diff options
Diffstat (limited to 'drivers/rtc')
33 files changed, 1520 insertions, 322 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index 0fe4ad8826b2..db2fe4ab4b4a 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -12,7 +12,7 @@ menuconfig RTC_CLASS select RTC_LIB help Generic RTC class support. If you say yes here, you will - be allowed to plug one or more RTCs to your system. You will + be allowed to plug one or more RTCs to your system. You will probably want to enable one or more of the interfaces below. if RTC_CLASS @@ -25,17 +25,9 @@ config RTC_HCTOSYS the value read from a specified RTC device. This is useful to avoid unnecessary fsck runs at boot time, and to network better. -config RTC_SYSTOHC - bool "Set the RTC time based on NTP synchronization" - default y - help - If you say yes here, the system time (wall clock) will be stored - in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11 - minutes if userspace reports synchronized NTP status. - config RTC_HCTOSYS_DEVICE string "RTC used to set the system time" - depends on RTC_HCTOSYS = y || RTC_SYSTOHC = y + depends on RTC_HCTOSYS default "rtc0" help The RTC device that will be used to (re)initialize the system @@ -56,6 +48,25 @@ config RTC_HCTOSYS_DEVICE sleep states. Do not specify an RTC here unless it stays powered during all this system's supported sleep states. +config RTC_SYSTOHC + bool "Set the RTC time based on NTP synchronization" + default y + help + If you say yes here, the system time (wall clock) will be stored + in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11 + minutes if userspace reports synchronized NTP status. + +config RTC_SYSTOHC_DEVICE + string "RTC used to synchronize NTP adjustment" + depends on RTC_SYSTOHC + default RTC_HCTOSYS_DEVICE if RTC_HCTOSYS + default "rtc0" + help + The RTC device used for NTP synchronization. The main difference + between RTC_HCTOSYS_DEVICE and RTC_SYSTOHC_DEVICE is that this + one can sleep when setting time, because it runs in the workqueue + context. + config RTC_DEBUG bool "RTC debug support" help @@ -135,7 +146,7 @@ if I2C config RTC_DRV_88PM860X tristate "Marvell 88PM860x" - depends on I2C && MFD_88PM860X + depends on MFD_88PM860X help If you say yes here you get support for RTC function in Marvell 88PM860x chips. @@ -145,7 +156,7 @@ config RTC_DRV_88PM860X config RTC_DRV_88PM80X tristate "Marvell 88PM80x" - depends on I2C && MFD_88PM800 + depends on MFD_88PM800 help If you say yes here you get support for RTC function in Marvell 88PM80x chips. @@ -154,10 +165,9 @@ config RTC_DRV_88PM80X will be called rtc-88pm80x. config RTC_DRV_ABB5ZES3 - depends on I2C - select REGMAP_I2C - tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3" - help + select REGMAP_I2C + tristate "Abracon AB-RTCMC-32.768kHz-B5ZE-S3" + help If you say yes here you get support for the Abracon AB-RTCMC-32.768kHz-B5ZE-S3 I2C RTC chip. @@ -204,7 +214,6 @@ config RTC_DRV_DS1307 config RTC_DRV_DS1374 tristate "Dallas/Maxim DS1374" - depends on I2C help If you say yes here you get support for Dallas Semiconductor DS1374 real-time clock chips. If an interrupt is associated @@ -232,7 +241,6 @@ config RTC_DRV_DS1672 config RTC_DRV_DS3232 tristate "Dallas/Maxim DS3232" - depends on I2C help If you say yes here you get support for Dallas Semiconductor DS3232 real-time clock chips. If an interrupt is associated @@ -243,7 +251,7 @@ config RTC_DRV_DS3232 config RTC_DRV_HYM8563 tristate "Haoyu Microelectronics HYM8563" - depends on I2C && OF + depends on OF help Say Y to enable support for the HYM8563 I2C RTC chip. Apart from the usual rtc functions it provides a clock output of @@ -365,10 +373,9 @@ config RTC_DRV_ISL12022 will be called rtc-isl12022. config RTC_DRV_ISL12057 - depends on I2C - select REGMAP_I2C - tristate "Intersil ISL12057" - help + select REGMAP_I2C + tristate "Intersil ISL12057" + help If you say yes here you get support for the Intersil ISL12057 I2C RTC chip. @@ -603,13 +610,13 @@ comment "SPI RTC drivers" if SPI_MASTER config RTC_DRV_M41T93 - tristate "ST M41T93" - help - If you say yes here you will get support for the - ST M41T93 SPI RTC chip. + tristate "ST M41T93" + help + If you say yes here you will get support for the + ST M41T93 SPI RTC chip. - This driver can also be built as a module. If so, the module - will be called rtc-m41t93. + This driver can also be built as a module. If so, the module + will be called rtc-m41t93. config RTC_DRV_M41T94 tristate "ST M41T94" @@ -1200,7 +1207,7 @@ config RTC_DRV_SH Say Y here to enable support for the on-chip RTC found in most SuperH processors. - To compile this driver as a module, choose M here: the + To compile this driver as a module, choose M here: the module will be called rtc-sh. config RTC_DRV_VR41XX @@ -1299,14 +1306,14 @@ config RTC_DRV_GENERIC just say Y. config RTC_DRV_PXA - tristate "PXA27x/PXA3xx" - depends on ARCH_PXA - help - If you say Y here you will get access to the real time clock - built into your PXA27x or PXA3xx CPU. + tristate "PXA27x/PXA3xx" + depends on ARCH_PXA + help + If you say Y here you will get access to the real time clock + built into your PXA27x or PXA3xx CPU. - This RTC driver uses PXA RTC registers available since pxa27x - series (RDxR, RYxR) instead of legacy RCNR, RTAR. + This RTC driver uses PXA RTC registers available since pxa27x + series (RDxR, RYxR) instead of legacy RCNR, RTAR. config RTC_DRV_VT8500 tristate "VIA/WonderMedia 85xx SoC RTC" @@ -1372,6 +1379,17 @@ config RTC_DRV_ARMADA38X This driver can also be built as a module. If so, the module will be called armada38x-rtc. +config RTC_DRV_GEMINI + tristate "Gemini SoC RTC" + depends on ARCH_GEMINI || COMPILE_TEST + depends on HAS_IOMEM + help + If you say Y here you will get support for the + RTC found on Gemini SoC's. + + This driver can also be built as a module. If so, the module + will be called rtc-gemini. + config RTC_DRV_PS3 tristate "PS3 RTC" depends on PPC_PS3 @@ -1396,6 +1414,7 @@ config RTC_DRV_COH901331 config RTC_DRV_STMP tristate "Freescale STMP3xxx/i.MX23/i.MX28 RTC" depends on ARCH_MXS + select STMP_DEVICE help If you say yes here you will get support for the onboard STMP3xxx/i.MX23/i.MX28 RTC. @@ -1520,6 +1539,17 @@ config RTC_DRV_SIRFSOC Say "yes" here to support the real time clock on SiRF SOC chips. This driver can also be built as a module called rtc-sirfsoc. +config RTC_DRV_ST_LPC + tristate "STMicroelectronics LPC RTC" + depends on ARCH_STI + depends on OF + help + Say Y here to include STMicroelectronics Low Power Controller + (LPC) based RTC support. + + To compile this driver as a module, choose M here: the + module will be called rtc-st-lpc. + config RTC_DRV_MOXART tristate "MOXA ART RTC" depends on ARCH_MOXART || COMPILE_TEST @@ -1530,9 +1560,20 @@ config RTC_DRV_MOXART This driver can also be built as a module. If so, the module will be called rtc-moxart +config RTC_DRV_MT6397 + tristate "Mediatek Real Time Clock driver" + depends on MFD_MT6397 || COMPILE_TEST + help + This selects the Mediatek(R) RTC driver. RTC is part of Mediatek + MT6397 PMIC. You should enable MT6397 PMIC MFD before select + Mediatek(R) RTC driver. + + If you want to use Mediatek(R) RTC interface, select Y or M here. + config RTC_DRV_XGENE tristate "APM X-Gene RTC" depends on HAS_IOMEM + depends on ARCH_XGENE || COMPILE_TEST help If you say yes here you get support for the APM X-Gene SoC real time clock. diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 2b82e2b0311b..1b09a62fcf4b 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -14,14 +14,14 @@ ifdef CONFIG_RTC_DRV_EFI rtc-core-y += rtc-efi-platform.o endif -rtc-core-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o -rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o -rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o +rtc-core-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o +rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o +rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o # Keep the list ordered. -obj-$(CONFIG_RTC_DRV_88PM860X) += rtc-88pm860x.o obj-$(CONFIG_RTC_DRV_88PM80X) += rtc-88pm80x.o +obj-$(CONFIG_RTC_DRV_88PM860X) += rtc-88pm860x.o obj-$(CONFIG_RTC_DRV_AB3100) += rtc-ab3100.o obj-$(CONFIG_RTC_DRV_AB8500) += rtc-ab8500.o obj-$(CONFIG_RTC_DRV_ABB5ZES3) += rtc-ab-b5ze-s3.o @@ -43,7 +43,6 @@ obj-$(CONFIG_RTC_DRV_DA9063) += rtc-da9063.o obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o obj-$(CONFIG_RTC_DRV_DIGICOLOR) += rtc-digicolor.o obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o -obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o obj-$(CONFIG_RTC_DRV_DS1286) += rtc-ds1286.o obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o @@ -58,20 +57,21 @@ obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o obj-$(CONFIG_RTC_DRV_DS1685_FAMILY) += rtc-ds1685.o obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o -obj-$(CONFIG_RTC_DRV_DS2404) += rtc-ds2404.o +obj-$(CONFIG_RTC_DRV_DS2404) += rtc-ds2404.o obj-$(CONFIG_RTC_DRV_DS3232) += rtc-ds3232.o obj-$(CONFIG_RTC_DRV_DS3234) += rtc-ds3234.o obj-$(CONFIG_RTC_DRV_EFI) += rtc-efi.o obj-$(CONFIG_RTC_DRV_EM3027) += rtc-em3027.o obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o +obj-$(CONFIG_RTC_DRV_GEMINI) += rtc-gemini.o obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o -obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o obj-$(CONFIG_RTC_DRV_ISL12057) += rtc-isl12057.o +obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o obj-$(CONFIG_RTC_DRV_LP8788) += rtc-lp8788.o obj-$(CONFIG_RTC_DRV_LPC32XX) += rtc-lpc32xx.o @@ -82,32 +82,35 @@ obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o obj-$(CONFIG_RTC_DRV_M48T35) += rtc-m48t35.o obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o -obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o +obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o +obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o +obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o obj-$(CONFIG_RTC_DRV_MAX8907) += rtc-max8907.o obj-$(CONFIG_RTC_DRV_MAX8925) += rtc-max8925.o -obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o -obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o -obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o -obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o +obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o -obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o +obj-$(CONFIG_RTC_DRV_MOXART) += rtc-moxart.o obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o +obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o +obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o +obj-$(CONFIG_RTC_DRV_MT6397) += rtc-mt6397.o obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o +obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o obj-$(CONFIG_RTC_DRV_NUC900) += rtc-nuc900.o -obj-$(CONFIG_RTC_DRV_OPAL) += rtc-opal.o obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o +obj-$(CONFIG_RTC_DRV_OPAL) += rtc-opal.o obj-$(CONFIG_RTC_DRV_PALMAS) += rtc-palmas.o obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o +obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o obj-$(CONFIG_RTC_DRV_PCF2127) += rtc-pcf2127.o +obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o +obj-$(CONFIG_RTC_DRV_PCF85063) += rtc-pcf85063.o obj-$(CONFIG_RTC_DRV_PCF8523) += rtc-pcf8523.o obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o -obj-$(CONFIG_RTC_DRV_PCF85063) += rtc-pcf85063.o obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o -obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o -obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o obj-$(CONFIG_RTC_DRV_PL030) += rtc-pl030.o obj-$(CONFIG_RTC_DRV_PL031) += rtc-pl031.o obj-$(CONFIG_RTC_DRV_PM8XXX) += rtc-pm8xxx.o @@ -130,21 +133,23 @@ obj-$(CONFIG_RTC_DRV_S3C) += rtc-s3c.o obj-$(CONFIG_RTC_DRV_S5M) += rtc-s5m.o obj-$(CONFIG_RTC_DRV_SA1100) += rtc-sa1100.o obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o +obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o obj-$(CONFIG_RTC_DRV_SNVS) += rtc-snvs.o obj-$(CONFIG_RTC_DRV_SPEAR) += rtc-spear.o obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o obj-$(CONFIG_RTC_DRV_STMP) += rtc-stmp3xxx.o +obj-$(CONFIG_RTC_DRV_ST_LPC) += rtc-st-lpc.o obj-$(CONFIG_RTC_DRV_SUN4V) += rtc-sun4v.o obj-$(CONFIG_RTC_DRV_SUN6I) += rtc-sun6i.o obj-$(CONFIG_RTC_DRV_SUNXI) += rtc-sunxi.o obj-$(CONFIG_RTC_DRV_TEGRA) += rtc-tegra.o obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o obj-$(CONFIG_RTC_DRV_TILE) += rtc-tile.o -obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl.o obj-$(CONFIG_RTC_DRV_TPS6586X) += rtc-tps6586x.o obj-$(CONFIG_RTC_DRV_TPS65910) += rtc-tps65910.o obj-$(CONFIG_RTC_DRV_TPS80031) += rtc-tps80031.o +obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl.o obj-$(CONFIG_RTC_DRV_TX4939) += rtc-tx4939.o obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o @@ -153,5 +158,3 @@ obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm831x.o obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o obj-$(CONFIG_RTC_DRV_XGENE) += rtc-xgene.o -obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o -obj-$(CONFIG_RTC_DRV_MOXART) += rtc-moxart.o diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 166fc60d8b55..11b639067312 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -91,51 +91,6 @@ int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm) } EXPORT_SYMBOL_GPL(rtc_set_time); -int rtc_set_mmss(struct rtc_device *rtc, unsigned long secs) -{ - int err; - - err = mutex_lock_interruptible(&rtc->ops_lock); - if (err) - return err; - - if (!rtc->ops) - err = -ENODEV; - else if (rtc->ops->set_mmss64) - err = rtc->ops->set_mmss64(rtc->dev.parent, secs); - else if (rtc->ops->set_mmss) - err = rtc->ops->set_mmss(rtc->dev.parent, secs); - else if (rtc->ops->read_time && rtc->ops->set_time) { - struct rtc_time new, old; - - err = rtc->ops->read_time(rtc->dev.parent, &old); - if (err == 0) { - rtc_time64_to_tm(secs, &new); - - /* - * avoid writing when we're going to change the day of - * the month. We will retry in the next minute. This - * basically means that if the RTC must not drift - * by more than 1 minute in 11 minutes. - */ - if (!((old.tm_hour == 23 && old.tm_min == 59) || - (new.tm_hour == 23 && new.tm_min == 59))) - err = rtc->ops->set_time(rtc->dev.parent, - &new); - } - } else { - err = -EINVAL; - } - - pm_stay_awake(rtc->dev.parent); - mutex_unlock(&rtc->ops_lock); - /* A timer might have just expired */ - schedule_work(&rtc->irqwork); - - return err; -} -EXPORT_SYMBOL_GPL(rtc_set_mmss); - static int rtc_read_alarm_internal(struct rtc_device *rtc, struct rtc_wkalrm *alarm) { int err; @@ -976,14 +931,12 @@ int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer, * * Kernel interface to cancel an rtc_timer */ -int rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer) +void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer) { - int ret = 0; mutex_lock(&rtc->ops_lock); if (timer->enabled) rtc_timer_remove(rtc, timer); mutex_unlock(&rtc->ops_lock); - return ret; } diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c index 6856f0a3a3d5..133d2e2e1a25 100644 --- a/drivers/rtc/rtc-ab8500.c +++ b/drivers/rtc/rtc-ab8500.c @@ -442,7 +442,7 @@ static const struct rtc_class_ops ab8540_rtc_ops = { .alarm_irq_enable = ab8500_rtc_irq_enable, }; -static struct platform_device_id ab85xx_rtc_ids[] = { +static const struct platform_device_id ab85xx_rtc_ids[] = { { "ab8500-rtc", (kernel_ulong_t)&ab8500_rtc_ops, }, { "ab8540-rtc", (kernel_ulong_t)&ab8540_rtc_ops, }, }; diff --git a/drivers/rtc/rtc-at32ap700x.c b/drivers/rtc/rtc-at32ap700x.c index d618d6c7ef93..83ac2337c0f7 100644 --- a/drivers/rtc/rtc-at32ap700x.c +++ b/drivers/rtc/rtc-at32ap700x.c @@ -282,6 +282,6 @@ static struct platform_driver at32_rtc_driver = { module_platform_driver_probe(at32_rtc_driver, at32_rtc_probe); -MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>"); +MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); MODULE_DESCRIPTION("Real time clock for AVR32 AT32AP700x"); MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-ds1216.c b/drivers/rtc/rtc-ds1216.c index d16f550897b8..12dbd70859ae 100644 --- a/drivers/rtc/rtc-ds1216.c +++ b/drivers/rtc/rtc-ds1216.c @@ -144,15 +144,13 @@ static int __init ds1216_rtc_probe(struct platform_device *pdev) struct ds1216_priv *priv; u8 dummy[8]; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; platform_set_drvdata(pdev, priv); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->ioaddr = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(priv->ioaddr)) return PTR_ERR(priv->ioaddr); diff --git a/drivers/rtc/rtc-ds1286.c b/drivers/rtc/rtc-ds1286.c index 2fe537f4e2bd..8247a29a4eb4 100644 --- a/drivers/rtc/rtc-ds1286.c +++ b/drivers/rtc/rtc-ds1286.c @@ -332,13 +332,11 @@ static int ds1286_probe(struct platform_device *pdev) struct resource *res; struct ds1286_priv *priv; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; priv = devm_kzalloc(&pdev->dev, sizeof(struct ds1286_priv), GFP_KERNEL); if (!priv) return -ENOMEM; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->rtcregs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(priv->rtcregs)) return PTR_ERR(priv->rtcregs); diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 4ffabb322a9a..6e76de1856fc 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -742,17 +742,17 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t) regs[6] &= ~MCP794XX_BIT_ALMX_IF; /* Set alarm match: second, minute, hour, day, date, month. */ regs[6] |= MCP794XX_MSK_ALMX_MATCH; - - if (t->enabled) - regs[0] |= MCP794XX_BIT_ALM0_EN; - else - regs[0] &= ~MCP794XX_BIT_ALM0_EN; + /* Disable interrupt. We will not enable until completely programmed */ + regs[0] &= ~MCP794XX_BIT_ALM0_EN; ret = ds1307->write_block_data(client, MCP794XX_REG_CONTROL, 10, regs); if (ret < 0) return ret; - return 0; + if (!t->enabled) + return 0; + regs[0] |= MCP794XX_BIT_ALM0_EN; + return i2c_smbus_write_byte_data(client, MCP794XX_REG_CONTROL, regs[0]); } static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled) diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c index a4888dbca2e1..92b1cbf2c4a7 100644 --- a/drivers/rtc/rtc-ds1672.c +++ b/drivers/rtc/rtc-ds1672.c @@ -198,6 +198,7 @@ static struct i2c_device_id ds1672_id[] = { { "ds1672", 0 }, { } }; +MODULE_DEVICE_TABLE(i2c, ds1672_id); static struct i2c_driver ds1672_driver = { .driver = { diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c index cb989cd00b14..3806961b4348 100644 --- a/drivers/rtc/rtc-efi.c +++ b/drivers/rtc/rtc-efi.c @@ -3,7 +3,7 @@ * * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. * - * Author: dann frazier <dannf@hp.com> + * Author: dann frazier <dannf@dannf.org> * Based on efirtc.c by Stephane Eranian * * This program is free software; you can redistribute it and/or modify it @@ -24,10 +24,6 @@ #include <linux/efi.h> #define EFI_ISDST (EFI_TIME_ADJUST_DAYLIGHT|EFI_TIME_IN_DAYLIGHT) -/* - * EFI Epoch is 1/1/1998 - */ -#define EFI_RTC_EPOCH 1998 /* * returns day of the year [0-365] @@ -38,31 +34,24 @@ compute_yday(efi_time_t *eft) /* efi_time_t.month is in the [1-12] so, we need -1 */ return rtc_year_days(eft->day, eft->month - 1, eft->year); } + /* * returns day of the week [0-6] 0=Sunday - * - * Don't try to provide a year that's before 1998, please ! */ static int -compute_wday(efi_time_t *eft) +compute_wday(efi_time_t *eft, int yday) { - int y; - int ndays = 0; - - if (eft->year < EFI_RTC_EPOCH) { - pr_err("EFI year < " __stringify(EFI_RTC_EPOCH) ", invalid date\n"); - return -1; - } - - for (y = EFI_RTC_EPOCH; y < eft->year; y++) - ndays += 365 + (is_leap_year(y) ? 1 : 0); - - ndays += compute_yday(eft); + int ndays = eft->year * (365 % 7) + + (eft->year - 1) / 4 + - (eft->year - 1) / 100 + + (eft->year - 1) / 400 + + yday; /* - * 4=1/1/1998 was a Thursday + * 1/1/0000 may or may not have been a Sunday (if it ever existed at + * all) but assuming it was makes this calculation work correctly. */ - return (ndays + 4) % 7; + return ndays % 7; } static void @@ -103,16 +92,16 @@ convert_from_efi_time(efi_time_t *eft, struct rtc_time *wtime) if (!eft->month || eft->month > 12) return false; wtime->tm_mon = eft->month - 1; - wtime->tm_year = eft->year - 1900; - /* day of the week [0-6], Sunday=0 */ - wtime->tm_wday = compute_wday(eft); - if (wtime->tm_wday < 0) + if (eft->year < 1900 || eft->year > 9999) return false; + wtime->tm_year = eft->year - 1900; /* day in the year [1-365]*/ wtime->tm_yday = compute_yday(eft); + /* day of the week [0-6], Sunday=0 */ + wtime->tm_wday = compute_wday(eft, wtime->tm_yday); switch (eft->daylight & EFI_ISDST) { case EFI_ISDST: @@ -233,7 +222,7 @@ static struct platform_driver efi_rtc_driver = { module_platform_driver_probe(efi_rtc_driver, efi_rtc_probe); MODULE_ALIAS("platform:rtc-efi"); -MODULE_AUTHOR("dann frazier <dannf@hp.com>"); +MODULE_AUTHOR("dann frazier <dannf@dannf.org>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("EFI RTC driver"); MODULE_ALIAS("platform:rtc-efi"); diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c index de325d68c7e4..a1628adf9f52 100644 --- a/drivers/rtc/rtc-ep93xx.c +++ b/drivers/rtc/rtc-ep93xx.c @@ -45,7 +45,7 @@ static int ep93xx_rtc_get_swcomp(struct device *dev, unsigned short *preload, struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); unsigned long comp; - comp = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_SWCOMP); + comp = readl(ep93xx_rtc->mmio_base + EP93XX_RTC_SWCOMP); if (preload) *preload = (comp & EP93XX_RTC_SWCOMP_INT_MASK) @@ -63,7 +63,7 @@ static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm) struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); unsigned long time; - time = __raw_readl(ep93xx_rtc->mmio_base + EP93XX_RTC_DATA); + time = readl(ep93xx_rtc->mmio_base + EP93XX_RTC_DATA); rtc_time_to_tm(time, tm); return 0; @@ -73,7 +73,7 @@ static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs) { struct ep93xx_rtc *ep93xx_rtc = dev_get_platdata(dev); - __raw_writel(secs + 1, ep93xx_rtc->mmio_base + EP93XX_RTC_LOAD); + writel(secs + 1, ep93xx_rtc->mmio_base + EP93XX_RTC_LOAD); return 0; } diff --git a/drivers/rtc/rtc-gemini.c b/drivers/rtc/rtc-gemini.c new file mode 100644 index 000000000000..35f4486738fc --- /dev/null +++ b/drivers/rtc/rtc-gemini.c @@ -0,0 +1,175 @@ +/* + * Gemini OnChip RTC + * + * Copyright (C) 2009 Janos Laube <janos.dev@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Original code for older kernel 2.6.15 are from Stormlinksemi + * first update from Janos Laube for > 2.6.29 kernels + * + * checkpatch fixes and usage of rtc-lib code + * Hans Ulli Kroll <ulli.kroll@googlemail.com> + */ + +#include <linux/rtc.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#define DRV_NAME "rtc-gemini" +#define DRV_VERSION "0.2" + +MODULE_AUTHOR("Hans Ulli Kroll <ulli.kroll@googlemail.com>"); +MODULE_DESCRIPTION("RTC driver for Gemini SoC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); + +struct gemini_rtc { + struct rtc_device *rtc_dev; + void __iomem *rtc_base; + int rtc_irq; +}; + +enum gemini_rtc_offsets { + GEMINI_RTC_SECOND = 0x00, + GEMINI_RTC_MINUTE = 0x04, + GEMINI_RTC_HOUR = 0x08, + GEMINI_RTC_DAYS = 0x0C, + GEMINI_RTC_ALARM_SECOND = 0x10, + GEMINI_RTC_ALARM_MINUTE = 0x14, + GEMINI_RTC_ALARM_HOUR = 0x18, + GEMINI_RTC_RECORD = 0x1C, + GEMINI_RTC_CR = 0x20 +}; + +static irqreturn_t gemini_rtc_interrupt(int irq, void *dev) +{ + return IRQ_HANDLED; +} + +/* + * Looks like the RTC in the Gemini SoC is (totaly) broken + * We can't read/write directly the time from RTC registers. + * We must do some "offset" calculation to get the real time + * + * This FIX works pretty fine and Stormlinksemi aka Cortina-Networks does + * the same thing, without the rtc-lib.c calls. + */ + +static int gemini_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct gemini_rtc *rtc = dev_get_drvdata(dev); + + unsigned int days, hour, min, sec; + unsigned long offset, time; + + sec = readl(rtc->rtc_base + GEMINI_RTC_SECOND); + min = readl(rtc->rtc_base + GEMINI_RTC_MINUTE); + hour = readl(rtc->rtc_base + GEMINI_RTC_HOUR); + days = readl(rtc->rtc_base + GEMINI_RTC_DAYS); + offset = readl(rtc->rtc_base + GEMINI_RTC_RECORD); + + time = offset + days * 86400 + hour * 3600 + min * 60 + sec; + + rtc_time_to_tm(time, tm); + + return 0; +} + +static int gemini_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct gemini_rtc *rtc = dev_get_drvdata(dev); + unsigned int sec, min, hour, day; + unsigned long offset, time; + + if (tm->tm_year >= 2148) /* EPOCH Year + 179 */ + return -EINVAL; + + rtc_tm_to_time(tm, &time); + + sec = readl(rtc->rtc_base + GEMINI_RTC_SECOND); + min = readl(rtc->rtc_base + GEMINI_RTC_MINUTE); + hour = readl(rtc->rtc_base + GEMINI_RTC_HOUR); + day = readl(rtc->rtc_base + GEMINI_RTC_DAYS); + + offset = time - (day * 86400 + hour * 3600 + min * 60 + sec); + + writel(offset, rtc->rtc_base + GEMINI_RTC_RECORD); + writel(0x01, rtc->rtc_base + GEMINI_RTC_CR); + + return 0; +} + +static struct rtc_class_ops gemini_rtc_ops = { + .read_time = gemini_rtc_read_time, + .set_time = gemini_rtc_set_time, +}; + +static int gemini_rtc_probe(struct platform_device *pdev) +{ + struct gemini_rtc *rtc; + struct device *dev = &pdev->dev; + struct resource *res; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (unlikely(!rtc)) + return -ENOMEM; + platform_set_drvdata(pdev, rtc); + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) + return -ENODEV; + + rtc->rtc_irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + rtc->rtc_base = devm_ioremap(dev, res->start, + resource_size(res)); + + ret = devm_request_irq(dev, rtc->rtc_irq, gemini_rtc_interrupt, + IRQF_SHARED, pdev->name, dev); + if (unlikely(ret)) + return ret; + + rtc->rtc_dev = rtc_device_register(pdev->name, dev, + &gemini_rtc_ops, THIS_MODULE); + if (likely(IS_ERR(rtc->rtc_dev))) + return PTR_ERR(rtc->rtc_dev); + + return 0; +} + +static int gemini_rtc_remove(struct platform_device *pdev) +{ + struct gemini_rtc *rtc = platform_get_drvdata(pdev); + + rtc_device_unregister(rtc->rtc_dev); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver gemini_rtc_driver = { + .driver = { + .name = DRV_NAME, + }, + .probe = gemini_rtc_probe, + .remove = gemini_rtc_remove, +}; + +module_platform_driver_probe(gemini_rtc_driver, gemini_rtc_probe); diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c index af4f85a66b39..c398f74234c6 100644 --- a/drivers/rtc/rtc-hid-sensor-time.c +++ b/drivers/rtc/rtc-hid-sensor-time.c @@ -318,7 +318,7 @@ static int hid_time_remove(struct platform_device *pdev) return 0; } -static struct platform_device_id hid_time_ids[] = { +static const struct platform_device_id hid_time_ids[] = { { /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ .name = "HID-SENSOR-2000a0", diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c index 0f710e98538f..e9da7959d3fe 100644 --- a/drivers/rtc/rtc-hym8563.c +++ b/drivers/rtc/rtc-hym8563.c @@ -548,14 +548,16 @@ static int hym8563_probe(struct i2c_client *client, return ret; } - ret = devm_request_threaded_irq(&client->dev, client->irq, - NULL, hym8563_irq, - IRQF_TRIGGER_LOW | IRQF_ONESHOT, - client->name, hym8563); - if (ret < 0) { - dev_err(&client->dev, "irq %d request failed, %d\n", - client->irq, ret); - return ret; + if (client->irq > 0) { + ret = devm_request_threaded_irq(&client->dev, client->irq, + NULL, hym8563_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + client->name, hym8563); + if (ret < 0) { + dev_err(&client->dev, "irq %d request failed, %d\n", + client->irq, ret); + return ret; + } } /* check state of calendar information */ diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c index c666eab98273..7bffd7f0e306 100644 --- a/drivers/rtc/rtc-imxdi.c +++ b/drivers/rtc/rtc-imxdi.c @@ -129,6 +129,324 @@ struct imxdi_dev { struct work_struct work; }; +/* Some background: + * + * The DryIce unit is a complex security/tamper monitor device. To be able do + * its job in a useful manner it runs a bigger statemachine to bring it into + * security/tamper failure state and once again to bring it out of this state. + * + * This unit can be in one of three states: + * + * - "NON-VALID STATE" + * always after the battery power was removed + * - "FAILURE STATE" + * if one of the enabled security events has happened + * - "VALID STATE" + * if the unit works as expected + * + * Everything stops when the unit enters the failure state including the RTC + * counter (to be able to detect the time the security event happened). + * + * The following events (when enabled) let the DryIce unit enter the failure + * state: + * + * - wire-mesh-tamper detect + * - external tamper B detect + * - external tamper A detect + * - temperature tamper detect + * - clock tamper detect + * - voltage tamper detect + * - RTC counter overflow + * - monotonic counter overflow + * - external boot + * + * If we find the DryIce unit in "FAILURE STATE" and the TDCHL cleared, we + * can only detect this state. In this case the unit is completely locked and + * must force a second "SYSTEM POR" to bring the DryIce into the + * "NON-VALID STATE" + "FAILURE STATE" where a recovery is possible. + * If the TDCHL is set in the "FAILURE STATE" we are out of luck. In this case + * a battery power cycle is required. + * + * In the "NON-VALID STATE" + "FAILURE STATE" we can clear the "FAILURE STATE" + * and recover the DryIce unit. By clearing the "NON-VALID STATE" as the last + * task, we bring back this unit into life. + */ + +/* + * Do a write into the unit without interrupt support. + * We do not need to check the WEF here, because the only reason this kind of + * write error can happen is if we write to the unit twice within the 122 us + * interval. This cannot happen, since we are using this function only while + * setting up the unit. + */ +static void di_write_busy_wait(const struct imxdi_dev *imxdi, u32 val, + unsigned reg) +{ + /* do the register write */ + writel(val, imxdi->ioaddr + reg); + + /* + * now it takes four 32,768 kHz clock cycles to take + * the change into effect = 122 us + */ + usleep_range(130, 200); +} + +static void di_report_tamper_info(struct imxdi_dev *imxdi, u32 dsr) +{ + u32 dtcr; + + dtcr = readl(imxdi->ioaddr + DTCR); + + dev_emerg(&imxdi->pdev->dev, "DryIce tamper event detected\n"); + /* the following flags force a transition into the "FAILURE STATE" */ + if (dsr & DSR_VTD) + dev_emerg(&imxdi->pdev->dev, "%sVoltage Tamper Event\n", + dtcr & DTCR_VTE ? "" : "Spurious "); + + if (dsr & DSR_CTD) + dev_emerg(&imxdi->pdev->dev, "%s32768 Hz Clock Tamper Event\n", + dtcr & DTCR_CTE ? "" : "Spurious "); + + if (dsr & DSR_TTD) + dev_emerg(&imxdi->pdev->dev, "%sTemperature Tamper Event\n", + dtcr & DTCR_TTE ? "" : "Spurious "); + + if (dsr & DSR_SAD) + dev_emerg(&imxdi->pdev->dev, + "%sSecure Controller Alarm Event\n", + dtcr & DTCR_SAIE ? "" : "Spurious "); + + if (dsr & DSR_EBD) + dev_emerg(&imxdi->pdev->dev, "%sExternal Boot Tamper Event\n", + dtcr & DTCR_EBE ? "" : "Spurious "); + + if (dsr & DSR_ETAD) + dev_emerg(&imxdi->pdev->dev, "%sExternal Tamper A Event\n", + dtcr & DTCR_ETAE ? "" : "Spurious "); + + if (dsr & DSR_ETBD) + dev_emerg(&imxdi->pdev->dev, "%sExternal Tamper B Event\n", + dtcr & DTCR_ETBE ? "" : "Spurious "); + + if (dsr & DSR_WTD) + dev_emerg(&imxdi->pdev->dev, "%sWire-mesh Tamper Event\n", + dtcr & DTCR_WTE ? "" : "Spurious "); + + if (dsr & DSR_MCO) + dev_emerg(&imxdi->pdev->dev, + "%sMonotonic-counter Overflow Event\n", + dtcr & DTCR_MOE ? "" : "Spurious "); + + if (dsr & DSR_TCO) + dev_emerg(&imxdi->pdev->dev, "%sTimer-counter Overflow Event\n", + dtcr & DTCR_TOE ? "" : "Spurious "); +} + +static void di_what_is_to_be_done(struct imxdi_dev *imxdi, + const char *power_supply) +{ + dev_emerg(&imxdi->pdev->dev, "Please cycle the %s power supply in order to get the DryIce/RTC unit working again\n", + power_supply); +} + +static int di_handle_failure_state(struct imxdi_dev *imxdi, u32 dsr) +{ + u32 dcr; + + dev_dbg(&imxdi->pdev->dev, "DSR register reports: %08X\n", dsr); + + /* report the cause */ + di_report_tamper_info(imxdi, dsr); + + dcr = readl(imxdi->ioaddr + DCR); + + if (dcr & DCR_FSHL) { + /* we are out of luck */ + di_what_is_to_be_done(imxdi, "battery"); + return -ENODEV; + } + /* + * with the next SYSTEM POR we will transit from the "FAILURE STATE" + * into the "NON-VALID STATE" + "FAILURE STATE" + */ + di_what_is_to_be_done(imxdi, "main"); + + return -ENODEV; +} + +static int di_handle_valid_state(struct imxdi_dev *imxdi, u32 dsr) +{ + /* initialize alarm */ + di_write_busy_wait(imxdi, DCAMR_UNSET, DCAMR); + di_write_busy_wait(imxdi, 0, DCALR); + + /* clear alarm flag */ + if (dsr & DSR_CAF) + di_write_busy_wait(imxdi, DSR_CAF, DSR); + + return 0; +} + +static int di_handle_invalid_state(struct imxdi_dev *imxdi, u32 dsr) +{ + u32 dcr, sec; + + /* + * lets disable all sources which can force the DryIce unit into + * the "FAILURE STATE" for now + */ + di_write_busy_wait(imxdi, 0x00000000, DTCR); + /* and lets protect them at runtime from any change */ + di_write_busy_wait(imxdi, DCR_TDCSL, DCR); + + sec = readl(imxdi->ioaddr + DTCMR); + if (sec != 0) + dev_warn(&imxdi->pdev->dev, + "The security violation has happend at %u seconds\n", + sec); + /* + * the timer cannot be set/modified if + * - the TCHL or TCSL bit is set in DCR + */ + dcr = readl(imxdi->ioaddr + DCR); + if (!(dcr & DCR_TCE)) { + if (dcr & DCR_TCHL) { + /* we are out of luck */ + di_what_is_to_be_done(imxdi, "battery"); + return -ENODEV; + } + if (dcr & DCR_TCSL) { + di_what_is_to_be_done(imxdi, "main"); + return -ENODEV; + } + } + /* + * - the timer counter stops/is stopped if + * - its overflow flag is set (TCO in DSR) + * -> clear overflow bit to make it count again + * - NVF is set in DSR + * -> clear non-valid bit to make it count again + * - its TCE (DCR) is cleared + * -> set TCE to make it count + * - it was never set before + * -> write a time into it (required again if the NVF was set) + */ + /* state handled */ + di_write_busy_wait(imxdi, DSR_NVF, DSR); + /* clear overflow flag */ + di_write_busy_wait(imxdi, DSR_TCO, DSR); + /* enable the counter */ + di_write_busy_wait(imxdi, dcr | DCR_TCE, DCR); + /* set and trigger it to make it count */ + di_write_busy_wait(imxdi, sec, DTCMR); + + /* now prepare for the valid state */ + return di_handle_valid_state(imxdi, __raw_readl(imxdi->ioaddr + DSR)); +} + +static int di_handle_invalid_and_failure_state(struct imxdi_dev *imxdi, u32 dsr) +{ + u32 dcr; + + /* + * now we must first remove the tamper sources in order to get the + * device out of the "FAILURE STATE" + * To disable any of the following sources we need to modify the DTCR + */ + if (dsr & (DSR_WTD | DSR_ETBD | DSR_ETAD | DSR_EBD | DSR_SAD | + DSR_TTD | DSR_CTD | DSR_VTD | DSR_MCO | DSR_TCO)) { + dcr = __raw_readl(imxdi->ioaddr + DCR); + if (dcr & DCR_TDCHL) { + /* + * the tamper register is locked. We cannot disable the + * tamper detection. The TDCHL can only be reset by a + * DRYICE POR, but we cannot force a DRYICE POR in + * softwere because we are still in "FAILURE STATE". + * We need a DRYICE POR via battery power cycling.... + */ + /* + * out of luck! + * we cannot disable them without a DRYICE POR + */ + di_what_is_to_be_done(imxdi, "battery"); + return -ENODEV; + } + if (dcr & DCR_TDCSL) { + /* a soft lock can be removed by a SYSTEM POR */ + di_what_is_to_be_done(imxdi, "main"); + return -ENODEV; + } + } + + /* disable all sources */ + di_write_busy_wait(imxdi, 0x00000000, DTCR); + + /* clear the status bits now */ + di_write_busy_wait(imxdi, dsr & (DSR_WTD | DSR_ETBD | DSR_ETAD | + DSR_EBD | DSR_SAD | DSR_TTD | DSR_CTD | DSR_VTD | + DSR_MCO | DSR_TCO), DSR); + + dsr = readl(imxdi->ioaddr + DSR); + if ((dsr & ~(DSR_NVF | DSR_SVF | DSR_WBF | DSR_WNF | + DSR_WCF | DSR_WEF)) != 0) + dev_warn(&imxdi->pdev->dev, + "There are still some sources of pain in DSR: %08x!\n", + dsr & ~(DSR_NVF | DSR_SVF | DSR_WBF | DSR_WNF | + DSR_WCF | DSR_WEF)); + + /* + * now we are trying to clear the "Security-violation flag" to + * get the DryIce out of this state + */ + di_write_busy_wait(imxdi, DSR_SVF, DSR); + + /* success? */ + dsr = readl(imxdi->ioaddr + DSR); + if (dsr & DSR_SVF) { + dev_crit(&imxdi->pdev->dev, + "Cannot clear the security violation flag. We are ending up in an endless loop!\n"); + /* last resort */ + di_what_is_to_be_done(imxdi, "battery"); + return -ENODEV; + } + + /* + * now we have left the "FAILURE STATE" and ending up in the + * "NON-VALID STATE" time to recover everything + */ + return di_handle_invalid_state(imxdi, dsr); +} + +static int di_handle_state(struct imxdi_dev *imxdi) +{ + int rc; + u32 dsr; + + dsr = readl(imxdi->ioaddr + DSR); + + switch (dsr & (DSR_NVF | DSR_SVF)) { + case DSR_NVF: + dev_warn(&imxdi->pdev->dev, "Invalid stated unit detected\n"); + rc = di_handle_invalid_state(imxdi, dsr); + break; + case DSR_SVF: + dev_warn(&imxdi->pdev->dev, "Failure stated unit detected\n"); + rc = di_handle_failure_state(imxdi, dsr); + break; + case DSR_NVF | DSR_SVF: + dev_warn(&imxdi->pdev->dev, + "Failure+Invalid stated unit detected\n"); + rc = di_handle_invalid_and_failure_state(imxdi, dsr); + break; + default: + dev_notice(&imxdi->pdev->dev, "Unlocked unit detected\n"); + rc = di_handle_valid_state(imxdi, dsr); + } + + return rc; +} + /* * enable a dryice interrupt */ @@ -137,8 +455,8 @@ static void di_int_enable(struct imxdi_dev *imxdi, u32 intr) unsigned long flags; spin_lock_irqsave(&imxdi->irq_lock, flags); - __raw_writel(__raw_readl(imxdi->ioaddr + DIER) | intr, - imxdi->ioaddr + DIER); + writel(readl(imxdi->ioaddr + DIER) | intr, + imxdi->ioaddr + DIER); spin_unlock_irqrestore(&imxdi->irq_lock, flags); } @@ -150,8 +468,8 @@ static void di_int_disable(struct imxdi_dev *imxdi, u32 intr) unsigned long flags; spin_lock_irqsave(&imxdi->irq_lock, flags); - __raw_writel(__raw_readl(imxdi->ioaddr + DIER) & ~intr, - imxdi->ioaddr + DIER); + writel(readl(imxdi->ioaddr + DIER) & ~intr, + imxdi->ioaddr + DIER); spin_unlock_irqrestore(&imxdi->irq_lock, flags); } @@ -169,11 +487,11 @@ static void clear_write_error(struct imxdi_dev *imxdi) dev_warn(&imxdi->pdev->dev, "WARNING: Register write error!\n"); /* clear the write error flag */ - __raw_writel(DSR_WEF, imxdi->ioaddr + DSR); + writel(DSR_WEF, imxdi->ioaddr + DSR); /* wait for it to take effect */ for (cnt = 0; cnt < 1000; cnt++) { - if ((__raw_readl(imxdi->ioaddr + DSR) & DSR_WEF) == 0) + if ((readl(imxdi->ioaddr + DSR) & DSR_WEF) == 0) return; udelay(10); } @@ -201,7 +519,7 @@ static int di_write_wait(struct imxdi_dev *imxdi, u32 val, int reg) imxdi->dsr = 0; /* do the register write */ - __raw_writel(val, imxdi->ioaddr + reg); + writel(val, imxdi->ioaddr + reg); /* wait for the write to finish */ ret = wait_event_interruptible_timeout(imxdi->write_wait, @@ -235,7 +553,7 @@ static int dryice_rtc_read_time(struct device *dev, struct rtc_time *tm) struct imxdi_dev *imxdi = dev_get_drvdata(dev); unsigned long now; - now = __raw_readl(imxdi->ioaddr + DTCMR); + now = readl(imxdi->ioaddr + DTCMR); rtc_time_to_tm(now, tm); return 0; @@ -248,14 +566,35 @@ static int dryice_rtc_read_time(struct device *dev, struct rtc_time *tm) static int dryice_rtc_set_mmss(struct device *dev, unsigned long secs) { struct imxdi_dev *imxdi = dev_get_drvdata(dev); + u32 dcr, dsr; int rc; + dcr = readl(imxdi->ioaddr + DCR); + dsr = readl(imxdi->ioaddr + DSR); + + if (!(dcr & DCR_TCE) || (dsr & DSR_SVF)) { + if (dcr & DCR_TCHL) { + /* we are even more out of luck */ + di_what_is_to_be_done(imxdi, "battery"); + return -EPERM; + } + if ((dcr & DCR_TCSL) || (dsr & DSR_SVF)) { + /* we are out of luck for now */ + di_what_is_to_be_done(imxdi, "main"); + return -EPERM; + } + } + /* zero the fractional part first */ rc = di_write_wait(imxdi, 0, DTCLR); - if (rc == 0) - rc = di_write_wait(imxdi, secs, DTCMR); + if (rc != 0) + return rc; - return rc; + rc = di_write_wait(imxdi, secs, DTCMR); + if (rc != 0) + return rc; + + return di_write_wait(imxdi, readl(imxdi->ioaddr + DCR) | DCR_TCE, DCR); } static int dryice_rtc_alarm_irq_enable(struct device *dev, @@ -280,17 +619,17 @@ static int dryice_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) struct imxdi_dev *imxdi = dev_get_drvdata(dev); u32 dcamr; - dcamr = __raw_readl(imxdi->ioaddr + DCAMR); + dcamr = readl(imxdi->ioaddr + DCAMR); rtc_time_to_tm(dcamr, &alarm->time); /* alarm is enabled if the interrupt is enabled */ - alarm->enabled = (__raw_readl(imxdi->ioaddr + DIER) & DIER_CAIE) != 0; + alarm->enabled = (readl(imxdi->ioaddr + DIER) & DIER_CAIE) != 0; /* don't allow the DSR read to mess up DSR_WCF */ mutex_lock(&imxdi->write_mutex); /* alarm is pending if the alarm flag is set */ - alarm->pending = (__raw_readl(imxdi->ioaddr + DSR) & DSR_CAF) != 0; + alarm->pending = (readl(imxdi->ioaddr + DSR) & DSR_CAF) != 0; mutex_unlock(&imxdi->write_mutex); @@ -312,7 +651,7 @@ static int dryice_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) return rc; /* don't allow setting alarm in the past */ - now = __raw_readl(imxdi->ioaddr + DTCMR); + now = readl(imxdi->ioaddr + DTCMR); if (alarm_time < now) return -EINVAL; @@ -346,7 +685,26 @@ static irqreturn_t dryice_norm_irq(int irq, void *dev_id) u32 dsr, dier; irqreturn_t rc = IRQ_NONE; - dier = __raw_readl(imxdi->ioaddr + DIER); + dier = readl(imxdi->ioaddr + DIER); + dsr = readl(imxdi->ioaddr + DSR); + + /* handle the security violation event */ + if (dier & DIER_SVIE) { + if (dsr & DSR_SVF) { + /* + * Disable the interrupt when this kind of event has + * happened. + * There cannot be more than one event of this type, + * because it needs a complex state change + * including a main power cycle to get again out of + * this state. + */ + di_int_disable(imxdi, DIER_SVIE); + /* report the violation */ + di_report_tamper_info(imxdi, dsr); + rc = IRQ_HANDLED; + } + } /* handle write complete and write error cases */ if (dier & DIER_WCIE) { @@ -357,7 +715,6 @@ static irqreturn_t dryice_norm_irq(int irq, void *dev_id) return rc; /* DSR_WCF clears itself on DSR read */ - dsr = __raw_readl(imxdi->ioaddr + DSR); if (dsr & (DSR_WCF | DSR_WEF)) { /* mask the interrupt */ di_int_disable(imxdi, DIER_WCIE); @@ -373,7 +730,6 @@ static irqreturn_t dryice_norm_irq(int irq, void *dev_id) /* handle the alarm case */ if (dier & DIER_CAIE) { /* DSR_WCF clears itself on DSR read */ - dsr = __raw_readl(imxdi->ioaddr + DSR); if (dsr & DSR_CAF) { /* mask the interrupt */ di_int_disable(imxdi, DIER_CAIE); @@ -446,7 +802,11 @@ static int __init dryice_rtc_probe(struct platform_device *pdev) */ /* mask all interrupts */ - __raw_writel(0, imxdi->ioaddr + DIER); + writel(0, imxdi->ioaddr + DIER); + + rc = di_handle_state(imxdi); + if (rc != 0) + goto err; rc = devm_request_irq(&pdev->dev, imxdi->irq, dryice_norm_irq, IRQF_SHARED, pdev->name, imxdi); @@ -455,44 +815,6 @@ static int __init dryice_rtc_probe(struct platform_device *pdev) goto err; } - /* put dryice into valid state */ - if (__raw_readl(imxdi->ioaddr + DSR) & DSR_NVF) { - rc = di_write_wait(imxdi, DSR_NVF | DSR_SVF, DSR); - if (rc) - goto err; - } - - /* initialize alarm */ - rc = di_write_wait(imxdi, DCAMR_UNSET, DCAMR); - if (rc) - goto err; - rc = di_write_wait(imxdi, 0, DCALR); - if (rc) - goto err; - - /* clear alarm flag */ - if (__raw_readl(imxdi->ioaddr + DSR) & DSR_CAF) { - rc = di_write_wait(imxdi, DSR_CAF, DSR); - if (rc) - goto err; - } - - /* the timer won't count if it has never been written to */ - if (__raw_readl(imxdi->ioaddr + DTCMR) == 0) { - rc = di_write_wait(imxdi, 0, DTCMR); - if (rc) - goto err; - } - - /* start keeping time */ - if (!(__raw_readl(imxdi->ioaddr + DCR) & DCR_TCE)) { - rc = di_write_wait(imxdi, - __raw_readl(imxdi->ioaddr + DCR) | DCR_TCE, - DCR); - if (rc) - goto err; - } - platform_set_drvdata(pdev, imxdi); imxdi->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &dryice_rtc_ops, THIS_MODULE); @@ -516,7 +838,7 @@ static int __exit dryice_rtc_remove(struct platform_device *pdev) flush_work(&imxdi->work); /* mask all interrupts */ - __raw_writel(0, imxdi->ioaddr + DIER); + writel(0, imxdi->ioaddr + DIER); clk_disable_unprepare(imxdi->clk); diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index c3c549d511b9..aa3b8f1b34d9 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -370,22 +370,15 @@ isl1208_i2c_set_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) struct rtc_time *alarm_tm = &alarm->time; u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, }; const int offs = ISL1208_REG_SCA; - unsigned long rtc_secs, alarm_secs; struct rtc_time rtc_tm; int err, enable; err = isl1208_i2c_read_time(client, &rtc_tm); if (err) return err; - err = rtc_tm_to_time(&rtc_tm, &rtc_secs); - if (err) - return err; - err = rtc_tm_to_time(alarm_tm, &alarm_secs); - if (err) - return err; /* If the alarm time is before the current time disable the alarm */ - if (!alarm->enabled || alarm_secs <= rtc_secs) + if (!alarm->enabled || rtc_tm_sub(alarm_tm, &rtc_tm) <= 0) enable = 0x00; else enable = 0x80; diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c index 4804985b876e..b2a76077bbfa 100644 --- a/drivers/rtc/rtc-max6900.c +++ b/drivers/rtc/rtc-max6900.c @@ -234,6 +234,7 @@ static struct i2c_device_id max6900_id[] = { { "max6900", 0 }, { } }; +MODULE_DEVICE_TABLE(i2c, max6900_id); static struct i2c_driver max6900_driver = { .driver = { diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c index 7632a87784c3..7184a0eda793 100644 --- a/drivers/rtc/rtc-max77686.c +++ b/drivers/rtc/rtc-max77686.c @@ -511,6 +511,7 @@ static const struct platform_device_id rtc_id[] = { { "max77686-rtc", 0 }, {}, }; +MODULE_DEVICE_TABLE(platform, rtc_id); static struct platform_driver max77686_rtc_driver = { .driver = { diff --git a/drivers/rtc/rtc-max77802.c b/drivers/rtc/rtc-max77802.c index 7f8adf8d6feb..82ffcc5a5345 100644 --- a/drivers/rtc/rtc-max77802.c +++ b/drivers/rtc/rtc-max77802.c @@ -484,6 +484,7 @@ static const struct platform_device_id rtc_id[] = { { "max77802-rtc", 0 }, {}, }; +MODULE_DEVICE_TABLE(platform, rtc_id); static struct platform_driver max77802_rtc_driver = { .driver = { diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c index 5726ef7bd56e..30804b00985e 100644 --- a/drivers/rtc/rtc-max8998.c +++ b/drivers/rtc/rtc-max8998.c @@ -309,6 +309,7 @@ static const struct platform_device_id max8998_rtc_id[] = { { "lp3974-rtc", TYPE_LP3974 }, { } }; +MODULE_DEVICE_TABLE(platform, max8998_rtc_id); static struct platform_driver max8998_rtc_driver = { .driver = { diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c index 32df1d812367..a65868065743 100644 --- a/drivers/rtc/rtc-mc13xxx.c +++ b/drivers/rtc/rtc-mc13xxx.c @@ -216,7 +216,7 @@ static int mc13xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) s1970 = rtc_tm_to_time64(&alarm->time); - dev_dbg(dev, "%s: o%2.s %lld\n", __func__, alarm->enabled ? "n" : "ff", + dev_dbg(dev, "%s: %s %lld\n", __func__, alarm->enabled ? "on" : "off", (long long)s1970); ret = mc13xxx_rtc_irq_enable_unlocked(dev, alarm->enabled, diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c new file mode 100644 index 000000000000..c0090b698ff3 --- /dev/null +++ b/drivers/rtc/rtc-mt6397.c @@ -0,0 +1,395 @@ +/* +* Copyright (c) 2014-2015 MediaTek Inc. +* Author: Tianping.Fang <tianping.fang@mediatek.com> +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License version 2 as +* published by the Free Software Foundation. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +*/ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/rtc.h> +#include <linux/irqdomain.h> +#include <linux/platform_device.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/io.h> +#include <linux/mfd/mt6397/core.h> + +#define RTC_BBPU 0x0000 +#define RTC_BBPU_CBUSY BIT(6) + +#define RTC_WRTGR 0x003c + +#define RTC_IRQ_STA 0x0002 +#define RTC_IRQ_STA_AL BIT(0) +#define RTC_IRQ_STA_LP BIT(3) + +#define RTC_IRQ_EN 0x0004 +#define RTC_IRQ_EN_AL BIT(0) +#define RTC_IRQ_EN_ONESHOT BIT(2) +#define RTC_IRQ_EN_LP BIT(3) +#define RTC_IRQ_EN_ONESHOT_AL (RTC_IRQ_EN_ONESHOT | RTC_IRQ_EN_AL) + +#define RTC_AL_MASK 0x0008 +#define RTC_AL_MASK_DOW BIT(4) + +#define RTC_TC_SEC 0x000a +/* Min, Hour, Dom... register offset to RTC_TC_SEC */ +#define RTC_OFFSET_SEC 0 +#define RTC_OFFSET_MIN 1 +#define RTC_OFFSET_HOUR 2 +#define RTC_OFFSET_DOM 3 +#define RTC_OFFSET_DOW 4 +#define RTC_OFFSET_MTH 5 +#define RTC_OFFSET_YEAR 6 +#define RTC_OFFSET_COUNT 7 + +#define RTC_AL_SEC 0x0018 + +#define RTC_PDN2 0x002e +#define RTC_PDN2_PWRON_ALARM BIT(4) + +#define RTC_MIN_YEAR 1968 +#define RTC_BASE_YEAR 1900 +#define RTC_NUM_YEARS 128 +#define RTC_MIN_YEAR_OFFSET (RTC_MIN_YEAR - RTC_BASE_YEAR) + +struct mt6397_rtc { + struct device *dev; + struct rtc_device *rtc_dev; + struct mutex lock; + struct regmap *regmap; + int irq; + u32 addr_base; +}; + +static int mtk_rtc_write_trigger(struct mt6397_rtc *rtc) +{ + unsigned long timeout = jiffies + HZ; + int ret; + u32 data; + + ret = regmap_write(rtc->regmap, rtc->addr_base + RTC_WRTGR, 1); + if (ret < 0) + return ret; + + while (1) { + ret = regmap_read(rtc->regmap, rtc->addr_base + RTC_BBPU, + &data); + if (ret < 0) + break; + if (!(data & RTC_BBPU_CBUSY)) + break; + if (time_after(jiffies, timeout)) { + ret = -ETIMEDOUT; + break; + } + cpu_relax(); + } + + return ret; +} + +static irqreturn_t mtk_rtc_irq_handler_thread(int irq, void *data) +{ + struct mt6397_rtc *rtc = data; + u32 irqsta, irqen; + int ret; + + ret = regmap_read(rtc->regmap, rtc->addr_base + RTC_IRQ_STA, &irqsta); + if ((ret >= 0) && (irqsta & RTC_IRQ_STA_AL)) { + rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF); + irqen = irqsta & ~RTC_IRQ_EN_AL; + mutex_lock(&rtc->lock); + if (regmap_write(rtc->regmap, rtc->addr_base + RTC_IRQ_EN, + irqen) < 0) + mtk_rtc_write_trigger(rtc); + mutex_unlock(&rtc->lock); + + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static int __mtk_rtc_read_time(struct mt6397_rtc *rtc, + struct rtc_time *tm, int *sec) +{ + int ret; + u16 data[RTC_OFFSET_COUNT]; + + mutex_lock(&rtc->lock); + ret = regmap_bulk_read(rtc->regmap, rtc->addr_base + RTC_TC_SEC, + data, RTC_OFFSET_COUNT); + if (ret < 0) + goto exit; + + tm->tm_sec = data[RTC_OFFSET_SEC]; + tm->tm_min = data[RTC_OFFSET_MIN]; + tm->tm_hour = data[RTC_OFFSET_HOUR]; + tm->tm_mday = data[RTC_OFFSET_DOM]; + tm->tm_mon = data[RTC_OFFSET_MTH]; + tm->tm_year = data[RTC_OFFSET_YEAR]; + + ret = regmap_read(rtc->regmap, rtc->addr_base + RTC_TC_SEC, sec); +exit: + mutex_unlock(&rtc->lock); + return ret; +} + +static int mtk_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + time64_t time; + struct mt6397_rtc *rtc = dev_get_drvdata(dev); + int days, sec, ret; + + do { + ret = __mtk_rtc_read_time(rtc, tm, &sec); + if (ret < 0) + goto exit; + } while (sec < tm->tm_sec); + + /* HW register use 7 bits to store year data, minus + * RTC_MIN_YEAR_OFFSET before write year data to register, and plus + * RTC_MIN_YEAR_OFFSET back after read year from register + */ + tm->tm_year += RTC_MIN_YEAR_OFFSET; + + /* HW register start mon from one, but tm_mon start from zero. */ + tm->tm_mon--; + time = rtc_tm_to_time64(tm); + + /* rtc_tm_to_time64 covert Gregorian date to seconds since + * 01-01-1970 00:00:00, and this date is Thursday. + */ + days = div_s64(time, 86400); + tm->tm_wday = (days + 4) % 7; + +exit: + return ret; +} + +static int mtk_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct mt6397_rtc *rtc = dev_get_drvdata(dev); + int ret; + u16 data[RTC_OFFSET_COUNT]; + + tm->tm_year -= RTC_MIN_YEAR_OFFSET; + tm->tm_mon++; + + data[RTC_OFFSET_SEC] = tm->tm_sec; + data[RTC_OFFSET_MIN] = tm->tm_min; + data[RTC_OFFSET_HOUR] = tm->tm_hour; + data[RTC_OFFSET_DOM] = tm->tm_mday; + data[RTC_OFFSET_MTH] = tm->tm_mon; + data[RTC_OFFSET_YEAR] = tm->tm_year; + + mutex_lock(&rtc->lock); + ret = regmap_bulk_write(rtc->regmap, rtc->addr_base + RTC_TC_SEC, + data, RTC_OFFSET_COUNT); + if (ret < 0) + goto exit; + + /* Time register write to hardware after call trigger function */ + ret = mtk_rtc_write_trigger(rtc); + +exit: + mutex_unlock(&rtc->lock); + return ret; +} + +static int mtk_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct rtc_time *tm = &alm->time; + struct mt6397_rtc *rtc = dev_get_drvdata(dev); + u32 irqen, pdn2; + int ret; + u16 data[RTC_OFFSET_COUNT]; + + mutex_lock(&rtc->lock); + ret = regmap_read(rtc->regmap, rtc->addr_base + RTC_IRQ_EN, &irqen); + if (ret < 0) + goto err_exit; + ret = regmap_read(rtc->regmap, rtc->addr_base + RTC_PDN2, &pdn2); + if (ret < 0) + goto err_exit; + + ret = regmap_bulk_read(rtc->regmap, rtc->addr_base + RTC_AL_SEC, + data, RTC_OFFSET_COUNT); + if (ret < 0) + goto err_exit; + + alm->enabled = !!(irqen & RTC_IRQ_EN_AL); + alm->pending = !!(pdn2 & RTC_PDN2_PWRON_ALARM); + mutex_unlock(&rtc->lock); + + tm->tm_sec = data[RTC_OFFSET_SEC]; + tm->tm_min = data[RTC_OFFSET_MIN]; + tm->tm_hour = data[RTC_OFFSET_HOUR]; + tm->tm_mday = data[RTC_OFFSET_DOM]; + tm->tm_mon = data[RTC_OFFSET_MTH]; + tm->tm_year = data[RTC_OFFSET_YEAR]; + + tm->tm_year += RTC_MIN_YEAR_OFFSET; + tm->tm_mon--; + + return 0; +err_exit: + mutex_unlock(&rtc->lock); + return ret; +} + +static int mtk_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct rtc_time *tm = &alm->time; + struct mt6397_rtc *rtc = dev_get_drvdata(dev); + int ret; + u16 data[RTC_OFFSET_COUNT]; + + tm->tm_year -= RTC_MIN_YEAR_OFFSET; + tm->tm_mon++; + + data[RTC_OFFSET_SEC] = tm->tm_sec; + data[RTC_OFFSET_MIN] = tm->tm_min; + data[RTC_OFFSET_HOUR] = tm->tm_hour; + data[RTC_OFFSET_DOM] = tm->tm_mday; + data[RTC_OFFSET_MTH] = tm->tm_mon; + data[RTC_OFFSET_YEAR] = tm->tm_year; + + mutex_lock(&rtc->lock); + if (alm->enabled) { + ret = regmap_bulk_write(rtc->regmap, + rtc->addr_base + RTC_AL_SEC, + data, RTC_OFFSET_COUNT); + if (ret < 0) + goto exit; + ret = regmap_write(rtc->regmap, rtc->addr_base + RTC_AL_MASK, + RTC_AL_MASK_DOW); + if (ret < 0) + goto exit; + ret = regmap_update_bits(rtc->regmap, + rtc->addr_base + RTC_IRQ_EN, + RTC_IRQ_EN_ONESHOT_AL, + RTC_IRQ_EN_ONESHOT_AL); + if (ret < 0) + goto exit; + } else { + ret = regmap_update_bits(rtc->regmap, + rtc->addr_base + RTC_IRQ_EN, + RTC_IRQ_EN_ONESHOT_AL, 0); + if (ret < 0) + goto exit; + } + + /* All alarm time register write to hardware after calling + * mtk_rtc_write_trigger. This can avoid race condition if alarm + * occur happen during writing alarm time register. + */ + ret = mtk_rtc_write_trigger(rtc); +exit: + mutex_unlock(&rtc->lock); + return ret; +} + +static struct rtc_class_ops mtk_rtc_ops = { + .read_time = mtk_rtc_read_time, + .set_time = mtk_rtc_set_time, + .read_alarm = mtk_rtc_read_alarm, + .set_alarm = mtk_rtc_set_alarm, +}; + +static int mtk_rtc_probe(struct platform_device *pdev) +{ + struct resource *res; + struct mt6397_chip *mt6397_chip = dev_get_drvdata(pdev->dev.parent); + struct mt6397_rtc *rtc; + int ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(struct mt6397_rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rtc->addr_base = res->start; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + rtc->irq = irq_create_mapping(mt6397_chip->irq_domain, res->start); + if (rtc->irq <= 0) + return -EINVAL; + + rtc->regmap = mt6397_chip->regmap; + rtc->dev = &pdev->dev; + mutex_init(&rtc->lock); + + platform_set_drvdata(pdev, rtc); + + ret = request_threaded_irq(rtc->irq, NULL, + mtk_rtc_irq_handler_thread, + IRQF_ONESHOT | IRQF_TRIGGER_HIGH, + "mt6397-rtc", rtc); + if (ret) { + dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", + rtc->irq, ret); + goto out_dispose_irq; + } + + rtc->rtc_dev = rtc_device_register("mt6397-rtc", &pdev->dev, + &mtk_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc_dev)) { + dev_err(&pdev->dev, "register rtc device failed\n"); + ret = PTR_ERR(rtc->rtc_dev); + goto out_free_irq; + } + + device_init_wakeup(&pdev->dev, 1); + + return 0; + +out_free_irq: + free_irq(rtc->irq, rtc->rtc_dev); +out_dispose_irq: + irq_dispose_mapping(rtc->irq); + return ret; +} + +static int mtk_rtc_remove(struct platform_device *pdev) +{ + struct mt6397_rtc *rtc = platform_get_drvdata(pdev); + + rtc_device_unregister(rtc->rtc_dev); + free_irq(rtc->irq, rtc->rtc_dev); + irq_dispose_mapping(rtc->irq); + + return 0; +} + +static const struct of_device_id mt6397_rtc_of_match[] = { + { .compatible = "mediatek,mt6397-rtc", }, + { } +}; + +static struct platform_driver mtk_rtc_driver = { + .driver = { + .name = "mt6397-rtc", + .of_match_table = mt6397_rtc_of_match, + }, + .probe = mtk_rtc_probe, + .remove = mtk_rtc_remove, +}; + +module_platform_driver(mtk_rtc_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Tianping Fang <tianping.fang@mediatek.com>"); +MODULE_DESCRIPTION("RTC Driver for MediaTek MT6397 PMIC"); +MODULE_ALIAS("platform:mt6397-rtc"); diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index 423762241042..7f50d2ef7f6e 100644 --- a/drivers/rtc/rtc-mv.c +++ b/drivers/rtc/rtc-mv.c @@ -10,6 +10,7 @@ #include <linux/kernel.h> #include <linux/rtc.h> #include <linux/bcd.h> +#include <linux/bitops.h> #include <linux/io.h> #include <linux/platform_device.h> #include <linux/of.h> @@ -24,7 +25,7 @@ #define RTC_MINUTES_OFFS 8 #define RTC_HOURS_OFFS 16 #define RTC_WDAY_OFFS 24 -#define RTC_HOURS_12H_MODE (1 << 22) /* 12 hours mode */ +#define RTC_HOURS_12H_MODE BIT(22) /* 12 hour mode */ #define RTC_DATE_REG_OFFS 4 #define RTC_MDAY_OFFS 0 @@ -33,7 +34,7 @@ #define RTC_ALARM_TIME_REG_OFFS 8 #define RTC_ALARM_DATE_REG_OFFS 0xc -#define RTC_ALARM_VALID (1 << 7) +#define RTC_ALARM_VALID BIT(7) #define RTC_ALARM_INTERRUPT_MASK_REG_OFFS 0x10 #define RTC_ALARM_INTERRUPT_CASUE_REG_OFFS 0x14 @@ -77,7 +78,7 @@ static int mv_rtc_read_time(struct device *dev, struct rtc_time *tm) second = rtc_time & 0x7f; minute = (rtc_time >> RTC_MINUTES_OFFS) & 0x7f; - hour = (rtc_time >> RTC_HOURS_OFFS) & 0x3f; /* assume 24 hours mode */ + hour = (rtc_time >> RTC_HOURS_OFFS) & 0x3f; /* assume 24 hour mode */ wday = (rtc_time >> RTC_WDAY_OFFS) & 0x7; day = rtc_date & 0x3f; @@ -108,7 +109,7 @@ static int mv_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) second = rtc_time & 0x7f; minute = (rtc_time >> RTC_MINUTES_OFFS) & 0x7f; - hour = (rtc_time >> RTC_HOURS_OFFS) & 0x3f; /* assume 24 hours mode */ + hour = (rtc_time >> RTC_HOURS_OFFS) & 0x3f; /* assume 24 hour mode */ wday = (rtc_time >> RTC_WDAY_OFFS) & 0x7; day = rtc_date & 0x3f; @@ -239,10 +240,10 @@ static int __init mv_rtc_probe(struct platform_device *pdev) if (!IS_ERR(pdata->clk)) clk_prepare_enable(pdata->clk); - /* make sure the 24 hours mode is enabled */ + /* make sure the 24 hour mode is enabled */ rtc_time = readl(pdata->ioaddr + RTC_TIME_REG_OFFS); if (rtc_time & RTC_HOURS_12H_MODE) { - dev_err(&pdev->dev, "24 Hours mode not supported.\n"); + dev_err(&pdev->dev, "12 Hour mode is enabled but not supported.\n"); ret = -EINVAL; goto out; } diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c index 09d422b9f7f7..5fc292c2dfdf 100644 --- a/drivers/rtc/rtc-mxc.c +++ b/drivers/rtc/rtc-mxc.c @@ -84,7 +84,7 @@ struct rtc_plat_data { enum imx_rtc_type devtype; }; -static struct platform_device_id imx_rtc_devtype[] = { +static const struct platform_device_id imx_rtc_devtype[] = { { .name = "imx1-rtc", .driver_data = IMX1_RTC, diff --git a/drivers/rtc/rtc-palmas.c b/drivers/rtc/rtc-palmas.c index 3b01d567496d..7ea2c471feca 100644 --- a/drivers/rtc/rtc-palmas.c +++ b/drivers/rtc/rtc-palmas.c @@ -239,7 +239,7 @@ static int palmas_rtc_probe(struct platform_device *pdev) struct palmas_rtc *palmas_rtc = NULL; int ret; bool enable_bb_charging = false; - bool high_bb_charging; + bool high_bb_charging = false; if (pdev->dev.of_node) { enable_bb_charging = of_property_read_bool(pdev->dev.of_node, diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index 0ba7e59929be..8bba022be946 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -22,7 +22,7 @@ #include <linux/of.h> #include <linux/err.h> -#define DRV_VERSION "0.4.3" +#define DRV_VERSION "0.4.4" #define PCF8563_REG_ST1 0x00 /* status */ #define PCF8563_REG_ST2 0x01 @@ -202,8 +202,9 @@ static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm) if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) { pcf8563->voltage_low = 1; - dev_info(&client->dev, + dev_err(&client->dev, "low voltage detected, date/time is not reliable.\n"); + return -EINVAL; } dev_dbg(&client->dev, @@ -234,12 +235,6 @@ static int pcf8563_get_datetime(struct i2c_client *client, struct rtc_time *tm) tm->tm_sec, tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); - /* the clock can give out invalid datetime, but we cannot return - * -EINVAL otherwise hwclock will refuse to set the time on bootup. - */ - if (rtc_valid_tm(tm) < 0) - dev_err(&client->dev, "retrieved date/time is not valid.\n"); - return 0; } @@ -363,13 +358,13 @@ static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm) struct i2c_client *client = to_i2c_client(dev); unsigned char buf[4]; int err; - unsigned long alarm_time; /* The alarm has no seconds, round up to nearest minute */ if (tm->time.tm_sec) { - rtc_tm_to_time(&tm->time, &alarm_time); - alarm_time += 60-tm->time.tm_sec; - rtc_time_to_tm(alarm_time, &tm->time); + time64_t alarm_time = rtc_tm_to_time64(&tm->time); + + alarm_time += 60 - tm->time.tm_sec; + rtc_time64_to_tm(alarm_time, &tm->time); } dev_dbg(dev, "%s, min=%d hour=%d wday=%d mday=%d " @@ -437,7 +432,7 @@ static int pcf8563_probe(struct i2c_client *client, } err = pcf8563_get_alarm_mode(client, NULL, &alm_pending); - if (err < 0) { + if (err) { dev_err(&client->dev, "%s: read error\n", __func__); return err; } diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index 76cbad7a99d3..a0f832362199 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -772,18 +772,6 @@ static struct s3c_rtc_data const s3c6410_rtc_data = { .disable = s3c6410_rtc_disable, }; -static struct s3c_rtc_data const exynos3250_rtc_data = { - .max_user_freq = 32768, - .needs_src_clk = true, - .irq_handler = s3c6410_rtc_irq, - .set_freq = s3c6410_rtc_setfreq, - .enable_tick = s3c6410_rtc_enable_tick, - .save_tick_cnt = s3c6410_rtc_save_tick_cnt, - .restore_tick_cnt = s3c6410_rtc_restore_tick_cnt, - .enable = s3c24xx_rtc_enable, - .disable = s3c6410_rtc_disable, -}; - static const struct of_device_id s3c_rtc_dt_match[] = { { .compatible = "samsung,s3c2410-rtc", @@ -799,7 +787,7 @@ static const struct of_device_id s3c_rtc_dt_match[] = { .data = (void *)&s3c6410_rtc_data, }, { .compatible = "samsung,exynos3250-rtc", - .data = (void *)&exynos3250_rtc_data, + .data = (void *)&s3c6410_rtc_data, }, { /* sentinel */ }, }; diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c index 0479e807a776..d87a85cefb66 100644 --- a/drivers/rtc/rtc-snvs.c +++ b/drivers/rtc/rtc-snvs.c @@ -322,6 +322,13 @@ static int snvs_rtc_suspend(struct device *dev) if (device_may_wakeup(dev)) enable_irq_wake(data->irq); + return 0; +} + +static int snvs_rtc_suspend_noirq(struct device *dev) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + if (data->clk) clk_disable_unprepare(data->clk); @@ -331,23 +338,28 @@ static int snvs_rtc_suspend(struct device *dev) static int snvs_rtc_resume(struct device *dev) { struct snvs_rtc_data *data = dev_get_drvdata(dev); - int ret; if (device_may_wakeup(dev)) - disable_irq_wake(data->irq); + return disable_irq_wake(data->irq); - if (data->clk) { - ret = clk_prepare_enable(data->clk); - if (ret) - return ret; - } + return 0; +} + +static int snvs_rtc_resume_noirq(struct device *dev) +{ + struct snvs_rtc_data *data = dev_get_drvdata(dev); + + if (data->clk) + return clk_prepare_enable(data->clk); return 0; } static const struct dev_pm_ops snvs_rtc_pm_ops = { - .suspend_noirq = snvs_rtc_suspend, - .resume_noirq = snvs_rtc_resume, + .suspend = snvs_rtc_suspend, + .suspend_noirq = snvs_rtc_suspend_noirq, + .resume = snvs_rtc_resume, + .resume_noirq = snvs_rtc_resume_noirq, }; #define SNVS_RTC_PM_OPS (&snvs_rtc_pm_ops) diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c index d2cdb9823a15..f05ef8568480 100644 --- a/drivers/rtc/rtc-spear.c +++ b/drivers/rtc/rtc-spear.c @@ -358,12 +358,6 @@ static int spear_rtc_probe(struct platform_device *pdev) int status = 0; int irq; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "no resource defined\n"); - return -EBUSY; - } - config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); if (!config) return -ENOMEM; @@ -383,6 +377,7 @@ static int spear_rtc_probe(struct platform_device *pdev) return status; } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); config->ioaddr = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(config->ioaddr)) return PTR_ERR(config->ioaddr); diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c new file mode 100644 index 000000000000..3f9d0acb81c7 --- /dev/null +++ b/drivers/rtc/rtc-st-lpc.c @@ -0,0 +1,354 @@ +/* + * rtc-st-lpc.c - ST's LPC RTC, powered by the Low Power Timer + * + * Copyright (C) 2014 STMicroelectronics Limited + * + * Author: David Paris <david.paris@st.com> for STMicroelectronics + * Lee Jones <lee.jones@linaro.org> for STMicroelectronics + * + * Based on the original driver written by Stuart Menefy. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> + +#include <dt-bindings/mfd/st-lpc.h> + +/* Low Power Timer */ +#define LPC_LPT_LSB_OFF 0x400 +#define LPC_LPT_MSB_OFF 0x404 +#define LPC_LPT_START_OFF 0x408 + +/* Low Power Alarm */ +#define LPC_LPA_LSB_OFF 0x410 +#define LPC_LPA_MSB_OFF 0x414 +#define LPC_LPA_START_OFF 0x418 + +/* LPC as WDT */ +#define LPC_WDT_OFF 0x510 +#define LPC_WDT_FLAG_OFF 0x514 + +struct st_rtc { + struct rtc_device *rtc_dev; + struct rtc_wkalrm alarm; + struct resource *res; + struct clk *clk; + unsigned long clkrate; + void __iomem *ioaddr; + bool irq_enabled:1; + spinlock_t lock; + short irq; +}; + +static void st_rtc_set_hw_alarm(struct st_rtc *rtc, + unsigned long msb, unsigned long lsb) +{ + unsigned long flags; + + spin_lock_irqsave(&rtc->lock, flags); + + writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF); + + writel_relaxed(msb, rtc->ioaddr + LPC_LPA_MSB_OFF); + writel_relaxed(lsb, rtc->ioaddr + LPC_LPA_LSB_OFF); + writel_relaxed(1, rtc->ioaddr + LPC_LPA_START_OFF); + + writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF); + + spin_unlock_irqrestore(&rtc->lock, flags); +} + +static irqreturn_t st_rtc_handler(int this_irq, void *data) +{ + struct st_rtc *rtc = (struct st_rtc *)data; + + rtc_update_irq(rtc->rtc_dev, 1, RTC_AF); + + return IRQ_HANDLED; +} + +static int st_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + unsigned long lpt_lsb, lpt_msb; + unsigned long long lpt; + unsigned long flags; + + spin_lock_irqsave(&rtc->lock, flags); + + do { + lpt_msb = readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF); + lpt_lsb = readl_relaxed(rtc->ioaddr + LPC_LPT_LSB_OFF); + } while (readl_relaxed(rtc->ioaddr + LPC_LPT_MSB_OFF) != lpt_msb); + + spin_unlock_irqrestore(&rtc->lock, flags); + + lpt = ((unsigned long long)lpt_msb << 32) | lpt_lsb; + do_div(lpt, rtc->clkrate); + rtc_time_to_tm(lpt, tm); + + return 0; +} + +static int st_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + unsigned long long lpt; + unsigned long secs, flags; + int ret; + + ret = rtc_tm_to_time(tm, &secs); + if (ret) + return ret; + + lpt = (unsigned long long)secs * rtc->clkrate; + + spin_lock_irqsave(&rtc->lock, flags); + + writel_relaxed(lpt >> 32, rtc->ioaddr + LPC_LPT_MSB_OFF); + writel_relaxed(lpt, rtc->ioaddr + LPC_LPT_LSB_OFF); + writel_relaxed(1, rtc->ioaddr + LPC_LPT_START_OFF); + + spin_unlock_irqrestore(&rtc->lock, flags); + + return 0; +} + +static int st_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + unsigned long flags; + + spin_lock_irqsave(&rtc->lock, flags); + + memcpy(wkalrm, &rtc->alarm, sizeof(struct rtc_wkalrm)); + + spin_unlock_irqrestore(&rtc->lock, flags); + + return 0; +} + +static int st_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + + if (enabled && !rtc->irq_enabled) { + enable_irq(rtc->irq); + rtc->irq_enabled = true; + } else if (!enabled && rtc->irq_enabled) { + disable_irq(rtc->irq); + rtc->irq_enabled = false; + } + + return 0; +} + +static int st_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *t) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + struct rtc_time now; + unsigned long now_secs; + unsigned long alarm_secs; + unsigned long long lpa; + + st_rtc_read_time(dev, &now); + rtc_tm_to_time(&now, &now_secs); + rtc_tm_to_time(&t->time, &alarm_secs); + + /* Invalid alarm time */ + if (now_secs > alarm_secs) + return -EINVAL; + + memcpy(&rtc->alarm, t, sizeof(struct rtc_wkalrm)); + + /* Now many secs to fire */ + alarm_secs -= now_secs; + lpa = (unsigned long long)alarm_secs * rtc->clkrate; + + st_rtc_set_hw_alarm(rtc, lpa >> 32, lpa); + st_rtc_alarm_irq_enable(dev, t->enabled); + + return 0; +} + +static struct rtc_class_ops st_rtc_ops = { + .read_time = st_rtc_read_time, + .set_time = st_rtc_set_time, + .read_alarm = st_rtc_read_alarm, + .set_alarm = st_rtc_set_alarm, + .alarm_irq_enable = st_rtc_alarm_irq_enable, +}; + +static int st_rtc_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct st_rtc *rtc; + struct resource *res; + struct rtc_time tm_check; + uint32_t mode; + int ret = 0; + + ret = of_property_read_u32(np, "st,lpc-mode", &mode); + if (ret) { + dev_err(&pdev->dev, "An LPC mode must be provided\n"); + return -EINVAL; + } + + /* LPC can either run in RTC or WDT mode */ + if (mode != ST_LPC_MODE_RTC) + return -ENODEV; + + rtc = devm_kzalloc(&pdev->dev, sizeof(struct st_rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + spin_lock_init(&rtc->lock); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rtc->ioaddr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(rtc->ioaddr)) + return PTR_ERR(rtc->ioaddr); + + rtc->irq = irq_of_parse_and_map(np, 0); + if (!rtc->irq) { + dev_err(&pdev->dev, "IRQ missing or invalid\n"); + return -EINVAL; + } + + ret = devm_request_irq(&pdev->dev, rtc->irq, st_rtc_handler, 0, + pdev->name, rtc); + if (ret) { + dev_err(&pdev->dev, "Failed to request irq %i\n", rtc->irq); + return ret; + } + + enable_irq_wake(rtc->irq); + disable_irq(rtc->irq); + + rtc->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(rtc->clk)) { + dev_err(&pdev->dev, "Unable to request clock\n"); + return PTR_ERR(rtc->clk); + } + + clk_prepare_enable(rtc->clk); + + rtc->clkrate = clk_get_rate(rtc->clk); + if (!rtc->clkrate) { + dev_err(&pdev->dev, "Unable to fetch clock rate\n"); + return -EINVAL; + } + + device_set_wakeup_capable(&pdev->dev, 1); + + platform_set_drvdata(pdev, rtc); + + /* + * The RTC-LPC is able to manage date.year > 2038 + * but currently the kernel can not manage this date! + * If the RTC-LPC has a date.year > 2038 then + * it's set to the epoch "Jan 1st 2000" + */ + st_rtc_read_time(&pdev->dev, &tm_check); + + if (tm_check.tm_year >= (2038 - 1900)) { + memset(&tm_check, 0, sizeof(tm_check)); + tm_check.tm_year = 100; + tm_check.tm_mday = 1; + st_rtc_set_time(&pdev->dev, &tm_check); + } + + rtc->rtc_dev = rtc_device_register("st-lpc-rtc", &pdev->dev, + &st_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc_dev)) { + clk_disable_unprepare(rtc->clk); + return PTR_ERR(rtc->rtc_dev); + } + + return 0; +} + +static int st_rtc_remove(struct platform_device *pdev) +{ + struct st_rtc *rtc = platform_get_drvdata(pdev); + + if (likely(rtc->rtc_dev)) + rtc_device_unregister(rtc->rtc_dev); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int st_rtc_suspend(struct device *dev) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + return 0; + + writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF); + writel_relaxed(0, rtc->ioaddr + LPC_LPA_START_OFF); + writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF); + + return 0; +} + +static int st_rtc_resume(struct device *dev) +{ + struct st_rtc *rtc = dev_get_drvdata(dev); + + rtc_alarm_irq_enable(rtc->rtc_dev, 0); + + /* + * clean 'rtc->alarm' to allow a new + * .set_alarm to the upper RTC layer + */ + memset(&rtc->alarm, 0, sizeof(struct rtc_wkalrm)); + + writel_relaxed(0, rtc->ioaddr + LPC_LPA_MSB_OFF); + writel_relaxed(0, rtc->ioaddr + LPC_LPA_LSB_OFF); + writel_relaxed(1, rtc->ioaddr + LPC_WDT_OFF); + writel_relaxed(1, rtc->ioaddr + LPC_LPA_START_OFF); + writel_relaxed(0, rtc->ioaddr + LPC_WDT_OFF); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(st_rtc_pm_ops, st_rtc_suspend, st_rtc_resume); + +static const struct of_device_id st_rtc_match[] = { + { .compatible = "st,stih407-lpc" }, + {} +}; +MODULE_DEVICE_TABLE(of, st_rtc_match); + +static struct platform_driver st_rtc_platform_driver = { + .driver = { + .name = "st-lpc-rtc", + .pm = &st_rtc_pm_ops, + .of_match_table = st_rtc_match, + }, + .probe = st_rtc_probe, + .remove = st_rtc_remove, +}; + +module_platform_driver(st_rtc_platform_driver); + +MODULE_DESCRIPTION("STMicroelectronics LPC RTC driver"); +MODULE_AUTHOR("David Paris <david.paris@st.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/rtc/rtc-sunxi.c b/drivers/rtc/rtc-sunxi.c index 6e678fa4dfaf..52543ae37c98 100644 --- a/drivers/rtc/rtc-sunxi.c +++ b/drivers/rtc/rtc-sunxi.c @@ -269,14 +269,13 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) struct sunxi_rtc_dev *chip = dev_get_drvdata(dev); struct rtc_time *alrm_tm = &wkalrm->time; struct rtc_time tm_now; - u32 alrm = 0; - unsigned long time_now = 0; - unsigned long time_set = 0; - unsigned long time_gap = 0; - unsigned long time_gap_day = 0; - unsigned long time_gap_hour = 0; - unsigned long time_gap_min = 0; - int ret = 0; + u32 alrm; + time64_t diff; + unsigned long time_gap; + unsigned long time_gap_day; + unsigned long time_gap_hour; + unsigned long time_gap_min; + int ret; ret = sunxi_rtc_gettime(dev, &tm_now); if (ret < 0) { @@ -284,14 +283,18 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) return -EINVAL; } - rtc_tm_to_time(alrm_tm, &time_set); - rtc_tm_to_time(&tm_now, &time_now); - if (time_set <= time_now) { + diff = rtc_tm_sub(alrm_tm, &tm_now); + if (diff <= 0) { dev_err(dev, "Date to set in the past\n"); return -EINVAL; } - time_gap = time_set - time_now; + if (diff > 255 * SEC_IN_DAY) { + dev_err(dev, "Day must be in the range 0 - 255\n"); + return -EINVAL; + } + + time_gap = diff; time_gap_day = time_gap / SEC_IN_DAY; time_gap -= time_gap_day * SEC_IN_DAY; time_gap_hour = time_gap / SEC_IN_HOUR; @@ -299,11 +302,6 @@ static int sunxi_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm) time_gap_min = time_gap / SEC_IN_MIN; time_gap -= time_gap_min * SEC_IN_MIN; - if (time_gap_day > 255) { - dev_err(dev, "Day must be in the range 0 - 255\n"); - return -EINVAL; - } - sunxi_rtc_setaie(0, chip); writel(0, chip->base + SUNXI_ALRM_DHMS); usleep_range(100, 300); diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c index bfbfa7ed7bbf..f9f97098c254 100644 --- a/drivers/rtc/rtc-v3020.c +++ b/drivers/rtc/rtc-v3020.c @@ -49,18 +49,13 @@ struct v3020_chip_ops { #define V3020_RD 2 #define V3020_IO 3 -struct v3020_gpio { - const char *name; - unsigned int gpio; -}; - struct v3020 { /* MMIO access */ void __iomem *ioaddress; int leftshift; /* GPIO access */ - struct v3020_gpio *gpio; + struct gpio *gpio; struct v3020_chip_ops *ops; @@ -107,48 +102,34 @@ static struct v3020_chip_ops v3020_mmio_ops = { .write_bit = v3020_mmio_write_bit, }; -static struct v3020_gpio v3020_gpio[] = { - { "RTC CS", 0 }, - { "RTC WR", 0 }, - { "RTC RD", 0 }, - { "RTC IO", 0 }, +static struct gpio v3020_gpio[] = { + { 0, GPIOF_OUT_INIT_HIGH, "RTC CS"}, + { 0, GPIOF_OUT_INIT_HIGH, "RTC WR"}, + { 0, GPIOF_OUT_INIT_HIGH, "RTC RD"}, + { 0, GPIOF_OUT_INIT_HIGH, "RTC IO"}, }; static int v3020_gpio_map(struct v3020 *chip, struct platform_device *pdev, struct v3020_platform_data *pdata) { - int i, err; + int err; v3020_gpio[V3020_CS].gpio = pdata->gpio_cs; v3020_gpio[V3020_WR].gpio = pdata->gpio_wr; v3020_gpio[V3020_RD].gpio = pdata->gpio_rd; v3020_gpio[V3020_IO].gpio = pdata->gpio_io; - for (i = 0; i < ARRAY_SIZE(v3020_gpio); i++) { - err = gpio_request(v3020_gpio[i].gpio, v3020_gpio[i].name); - if (err) - goto err_request; + err = gpio_request_array(v3020_gpio, ARRAY_SIZE(v3020_gpio)); - gpio_direction_output(v3020_gpio[i].gpio, 1); - } - - chip->gpio = v3020_gpio; - - return 0; - -err_request: - while (--i >= 0) - gpio_free(v3020_gpio[i].gpio); + if (!err) + chip->gpio = v3020_gpio; return err; } static void v3020_gpio_unmap(struct v3020 *chip) { - int i; - - for (i = 0; i < ARRAY_SIZE(v3020_gpio); i++) - gpio_free(v3020_gpio[i].gpio); + gpio_free_array(v3020_gpio, ARRAY_SIZE(v3020_gpio)); } static void v3020_gpio_write_bit(struct v3020 *chip, unsigned char bit) diff --git a/drivers/rtc/systohc.c b/drivers/rtc/systohc.c index 7728d5e32bf4..b4a68ffcd06b 100644 --- a/drivers/rtc/systohc.c +++ b/drivers/rtc/systohc.c @@ -31,7 +31,7 @@ int rtc_set_ntp_time(struct timespec64 now) else rtc_time64_to_tm(now.tv_sec + 1, &tm); - rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE); + rtc = rtc_class_open(CONFIG_RTC_SYSTOHC_DEVICE); if (rtc) { /* rtc_hctosys exclusively uses UTC, so we call set_time here, * not set_mmss. */ |
