diff options
Diffstat (limited to 'drivers/power/reset')
| -rw-r--r-- | drivers/power/reset/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/reset/at91-reset.c | 6 | ||||
| -rw-r--r-- | drivers/power/reset/at91-sama5d2_shdwc.c | 80 | ||||
| -rw-r--r-- | drivers/power/reset/gpio-restart.c | 8 | ||||
| -rw-r--r-- | drivers/power/reset/mt6323-poweroff.c | 97 | ||||
| -rw-r--r-- | drivers/power/reset/reboot-mode.c | 2 |
7 files changed, 172 insertions, 36 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index a564237278ff..513efe8e7628 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -26,7 +26,7 @@ config POWER_RESET_AT91_POWEROFF config POWER_RESET_AT91_RESET tristate "Atmel AT91 reset driver" depends on ARCH_AT91 - default SOC_AT91SAM9 || SOC_SAMA5 + default SOC_AT91SAM9 || SOC_SAM9X60 || SOC_SAMA5 help This driver supports restart for Atmel AT91SAM9 and SAMA5 SoCs @@ -34,7 +34,7 @@ config POWER_RESET_AT91_RESET config POWER_RESET_AT91_SAMA5D2_SHDWC tristate "Atmel AT91 SAMA5D2-Compatible shutdown controller driver" depends on ARCH_AT91 - default SOC_SAMA5 + default SOC_SAM9X60 || SOC_SAMA5 help This driver supports the alternate shutdown controller for some Atmel SAMA5 SoCs. It is present for example on SAMA5D2 SoC. @@ -140,6 +140,16 @@ config POWER_RESET_LTC2952 This driver supports an external powerdown trigger and board power down via the LTC2952. Bindings are made in the device tree. +config POWER_RESET_MT6323 + bool "MediaTek MT6323 power-off driver" + depends on MFD_MT6397 + help + The power-off driver is responsible for externally shutdown down + the power of a remote MediaTek SoC MT6323 is connected to through + controlling a tiny circuit BBPU inside MT6323 RTC. + + Say Y if you have a board where MT6323 could be found. + config POWER_RESET_QNAP bool "QNAP power-off driver" depends on OF_GPIO && PLAT_ORION diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 85da3198e4e0..da37f8b851dc 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o +obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c index 44ca983a49a1..d94e3267c3b6 100644 --- a/drivers/power/reset/at91-reset.c +++ b/drivers/power/reset/at91-reset.c @@ -131,7 +131,7 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode, static int sama5d3_restart(struct notifier_block *this, unsigned long mode, void *cmd) { - writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST), + writel(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST, at91_rstc_base); return NOTIFY_DONE; @@ -140,9 +140,7 @@ static int sama5d3_restart(struct notifier_block *this, unsigned long mode, static int samx7_restart(struct notifier_block *this, unsigned long mode, void *cmd) { - writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PROCRST), - at91_rstc_base); - + writel(AT91_RSTC_KEY | AT91_RSTC_PROCRST, at91_rstc_base); return NOTIFY_DONE; } diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c index e341cc5c0ea6..2fe3a627cb53 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -66,7 +66,7 @@ #define SHDW_CFG_NOT_USED (32) -struct shdwc_config { +struct shdwc_reg_config { u8 wkup_pin_input; u8 mr_rtcwk_shift; u8 mr_rttwk_shift; @@ -74,8 +74,17 @@ struct shdwc_config { u8 sr_rttwk_shift; }; +struct pmc_reg_config { + u8 mckr; +}; + +struct reg_config { + struct shdwc_reg_config shdwc; + struct pmc_reg_config pmc; +}; + struct shdwc { - const struct shdwc_config *cfg; + const struct reg_config *rcfg; struct clk *sclk; void __iomem *shdwc_base; void __iomem *mpddrc_base; @@ -95,6 +104,7 @@ static const unsigned long long sdwc_dbc_period[] = { static void __init at91_wakeup_status(struct platform_device *pdev) { struct shdwc *shdw = platform_get_drvdata(pdev); + const struct reg_config *rcfg = shdw->rcfg; u32 reg; char *reason = "unknown"; @@ -106,11 +116,11 @@ static void __init at91_wakeup_status(struct platform_device *pdev) if (!reg) return; - if (SHDW_WK_PIN(reg, shdw->cfg)) + if (SHDW_WK_PIN(reg, &rcfg->shdwc)) reason = "WKUP pin"; - else if (SHDW_RTCWK(reg, shdw->cfg)) + else if (SHDW_RTCWK(reg, &rcfg->shdwc)) reason = "RTC"; - else if (SHDW_RTTWK(reg, shdw->cfg)) + else if (SHDW_RTTWK(reg, &rcfg->shdwc)) reason = "RTT"; pr_info("AT91: Wake-Up source: %s\n", reason); @@ -131,9 +141,9 @@ static void at91_poweroff(void) " str %1, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t" /* Switch the master clock source to slow clock. */ - "1: ldr r6, [%4, #" __stringify(AT91_PMC_MCKR) "]\n\t" + "1: ldr r6, [%4, %5]\n\t" " bic r6, r6, #" __stringify(AT91_PMC_CSS) "\n\t" - " str r6, [%4, #" __stringify(AT91_PMC_MCKR) "]\n\t" + " str r6, [%4, %5]\n\t" /* Wait for clock switch. */ "2: ldr r6, [%4, #" __stringify(AT91_PMC_SR) "]\n\t" " tst r6, #" __stringify(AT91_PMC_MCKRDY) "\n\t" @@ -148,7 +158,8 @@ static void at91_poweroff(void) "r" cpu_to_le32(AT91_DDRSDRC_LPDDR2_PWOFF), "r" (at91_shdwc->shdwc_base), "r" cpu_to_le32(AT91_SHDW_KEY | AT91_SHDW_SHDW), - "r" (at91_shdwc->pmc_base) + "r" (at91_shdwc->pmc_base), + "r" (at91_shdwc->rcfg->pmc.mckr) : "r6"); } @@ -215,6 +226,7 @@ static u32 at91_shdwc_get_wakeup_input(struct platform_device *pdev, static void at91_shdwc_dt_configure(struct platform_device *pdev) { struct shdwc *shdw = platform_get_drvdata(pdev); + const struct reg_config *rcfg = shdw->rcfg; struct device_node *np = pdev->dev.of_node; u32 mode = 0, tmp, input; @@ -227,10 +239,10 @@ static void at91_shdwc_dt_configure(struct platform_device *pdev) mode |= AT91_SHDW_WKUPDBC(at91_shdwc_debouncer_value(pdev, tmp)); if (of_property_read_bool(np, "atmel,wakeup-rtc-timer")) - mode |= SHDW_RTCWKEN(shdw->cfg); + mode |= SHDW_RTCWKEN(&rcfg->shdwc); if (of_property_read_bool(np, "atmel,wakeup-rtt-timer")) - mode |= SHDW_RTTWKEN(shdw->cfg); + mode |= SHDW_RTTWKEN(&rcfg->shdwc); dev_dbg(&pdev->dev, "%s: mode = %#x\n", __func__, mode); writel(mode, shdw->shdwc_base + AT91_SHDW_MR); @@ -239,36 +251,52 @@ static void at91_shdwc_dt_configure(struct platform_device *pdev) writel(input, shdw->shdwc_base + AT91_SHDW_WUIR); } -static const struct shdwc_config sama5d2_shdwc_config = { - .wkup_pin_input = 0, - .mr_rtcwk_shift = 17, - .mr_rttwk_shift = SHDW_CFG_NOT_USED, - .sr_rtcwk_shift = 5, - .sr_rttwk_shift = SHDW_CFG_NOT_USED, +static const struct reg_config sama5d2_reg_config = { + .shdwc = { + .wkup_pin_input = 0, + .mr_rtcwk_shift = 17, + .mr_rttwk_shift = SHDW_CFG_NOT_USED, + .sr_rtcwk_shift = 5, + .sr_rttwk_shift = SHDW_CFG_NOT_USED, + }, + .pmc = { + .mckr = 0x30, + }, }; -static const struct shdwc_config sam9x60_shdwc_config = { - .wkup_pin_input = 0, - .mr_rtcwk_shift = 17, - .mr_rttwk_shift = 16, - .sr_rtcwk_shift = 5, - .sr_rttwk_shift = 4, +static const struct reg_config sam9x60_reg_config = { + .shdwc = { + .wkup_pin_input = 0, + .mr_rtcwk_shift = 17, + .mr_rttwk_shift = 16, + .sr_rtcwk_shift = 5, + .sr_rttwk_shift = 4, + }, + .pmc = { + .mckr = 0x28, + }, }; static const struct of_device_id at91_shdwc_of_match[] = { { .compatible = "atmel,sama5d2-shdwc", - .data = &sama5d2_shdwc_config, + .data = &sama5d2_reg_config, }, { .compatible = "microchip,sam9x60-shdwc", - .data = &sam9x60_shdwc_config, + .data = &sam9x60_reg_config, }, { /*sentinel*/ } }; MODULE_DEVICE_TABLE(of, at91_shdwc_of_match); +static const struct of_device_id at91_pmc_ids[] = { + { .compatible = "atmel,sama5d2-pmc" }, + { .compatible = "microchip,sam9x60-pmc" }, + { /* Sentinel. */ } +}; + static int __init at91_shdwc_probe(struct platform_device *pdev) { struct resource *res; @@ -297,7 +325,7 @@ static int __init at91_shdwc_probe(struct platform_device *pdev) } match = of_match_node(at91_shdwc_of_match, pdev->dev.of_node); - at91_shdwc->cfg = match->data; + at91_shdwc->rcfg = match->data; at91_shdwc->sclk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(at91_shdwc->sclk)) @@ -313,7 +341,7 @@ static int __init at91_shdwc_probe(struct platform_device *pdev) at91_shdwc_dt_configure(pdev); - np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-pmc"); + np = of_find_matching_node(NULL, at91_pmc_ids); if (!np) { ret = -ENODEV; goto clk_disable; diff --git a/drivers/power/reset/gpio-restart.c b/drivers/power/reset/gpio-restart.c index 2880cd5ae0d2..5466eeea261c 100644 --- a/drivers/power/reset/gpio-restart.c +++ b/drivers/power/reset/gpio-restart.c @@ -64,9 +64,11 @@ static int gpio_restart_probe(struct platform_device *pdev) gpio_restart->reset_gpio = devm_gpiod_get(&pdev->dev, NULL, open_source ? GPIOD_IN : GPIOD_OUT_LOW); - if (IS_ERR(gpio_restart->reset_gpio)) { - dev_err(&pdev->dev, "Could net get reset GPIO\n"); - return PTR_ERR(gpio_restart->reset_gpio); + ret = PTR_ERR_OR_ZERO(gpio_restart->reset_gpio); + if (ret) { + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "Could not get reset GPIO\n"); + return ret; } gpio_restart->restart_handler.notifier_call = gpio_restart_notify; diff --git a/drivers/power/reset/mt6323-poweroff.c b/drivers/power/reset/mt6323-poweroff.c new file mode 100644 index 000000000000..1caf43d9e46d --- /dev/null +++ b/drivers/power/reset/mt6323-poweroff.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Power off through MediaTek PMIC + * + * Copyright (C) 2018 MediaTek Inc. + * + * Author: Sean Wang <sean.wang@mediatek.com> + * + */ + +#include <linux/err.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/mfd/mt6397/core.h> +#include <linux/mfd/mt6397/rtc.h> + +struct mt6323_pwrc { + struct device *dev; + struct regmap *regmap; + u32 base; +}; + +static struct mt6323_pwrc *mt_pwrc; + +static void mt6323_do_pwroff(void) +{ + struct mt6323_pwrc *pwrc = mt_pwrc; + unsigned int val; + int ret; + + regmap_write(pwrc->regmap, pwrc->base + RTC_BBPU, RTC_BBPU_KEY); + regmap_write(pwrc->regmap, pwrc->base + RTC_WRTGR, 1); + + ret = regmap_read_poll_timeout(pwrc->regmap, + pwrc->base + RTC_BBPU, val, + !(val & RTC_BBPU_CBUSY), + MTK_RTC_POLL_DELAY_US, + MTK_RTC_POLL_TIMEOUT); + if (ret) + dev_err(pwrc->dev, "failed to write BBPU: %d\n", ret); + + /* Wait some time until system down, otherwise, notice with a warn */ + mdelay(1000); + + WARN_ONCE(1, "Unable to power off system\n"); +} + +static int mt6323_pwrc_probe(struct platform_device *pdev) +{ + struct mt6397_chip *mt6397_chip = dev_get_drvdata(pdev->dev.parent); + struct mt6323_pwrc *pwrc; + struct resource *res; + + pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL); + if (!pwrc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + pwrc->base = res->start; + pwrc->regmap = mt6397_chip->regmap; + pwrc->dev = &pdev->dev; + mt_pwrc = pwrc; + + pm_power_off = &mt6323_do_pwroff; + + return 0; +} + +static int mt6323_pwrc_remove(struct platform_device *pdev) +{ + if (pm_power_off == &mt6323_do_pwroff) + pm_power_off = NULL; + + return 0; +} + +static const struct of_device_id mt6323_pwrc_dt_match[] = { + { .compatible = "mediatek,mt6323-pwrc" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mt6323_pwrc_dt_match); + +static struct platform_driver mt6323_pwrc_driver = { + .probe = mt6323_pwrc_probe, + .remove = mt6323_pwrc_remove, + .driver = { + .name = "mt6323-pwrc", + .of_match_table = mt6323_pwrc_dt_match, + }, +}; + +module_platform_driver(mt6323_pwrc_driver); + +MODULE_DESCRIPTION("Poweroff driver for MT6323 PMIC"); +MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/power/reset/reboot-mode.c b/drivers/power/reset/reboot-mode.c index 06ff035b57f5..b4076b10b893 100644 --- a/drivers/power/reset/reboot-mode.c +++ b/drivers/power/reset/reboot-mode.c @@ -190,6 +190,6 @@ void devm_reboot_mode_unregister(struct device *dev, } EXPORT_SYMBOL_GPL(devm_reboot_mode_unregister); -MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com"); +MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>"); MODULE_DESCRIPTION("System reboot mode core library"); MODULE_LICENSE("GPL v2"); |
