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authorTiejun Chen <tiejun.chen@windriver.com>2008-11-25 16:33:20 +0800
committerRalf Baechle <ralf@linux-mips.org>2008-12-04 17:47:27 +0000
commit192cc7f0900a088e464635a59a63d974ee7a3e97 (patch)
tree18b8c7f2104f18314e82f6cc186a7f68c7375bba /arch/mips/mti-malta
parente807f9574e37a3f202e677feaaad1b7c5d2c0db8 (diff)
downloadblackbird-obmc-linux-192cc7f0900a088e464635a59a63d974ee7a3e97.tar.gz
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MIPS: Malta: Add back RTC support
With the conversion of MIPS to RTC_LIB the old RTC driver CONFIG_RTC became unselectable. Fix by setting up a platform device. Also enable RTC_CLASS so system time gets set from RTC on kernel initialization. [Ralf: Original patch by Tiejun; polished nice and shiny by me] Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mti-malta')
-rw-r--r--arch/mips/mti-malta/malta-platform.c56
1 files changed, 47 insertions, 9 deletions
diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c
index 83b9bab3cd3f..6a476f7733b3 100644
--- a/arch/mips/mti-malta/malta-platform.c
+++ b/arch/mips/mti-malta/malta-platform.c
@@ -6,7 +6,10 @@
* Copyright (C) 2007 MIPS Technologies, Inc.
* written by Ralf Baechle (ralf@linux-mips.org)
*
- * Probe driver for the Malta's UART ports:
+ * Copyright (C) 2008 Wind River Systems, Inc.
+ * updated by Tiejun Chen <tiejun.chen@windriver.com>
+ *
+ * 1. Probe driver for the Malta's UART ports:
*
* o 2 ports in the SMC SuperIO
* o 1 port in the CBUS UART, a discrete 16550 which normally is only used
@@ -14,10 +17,14 @@
*
* We don't use 8250_platform.c on Malta as it would result in the CBUS
* UART becoming ttyS0.
+ *
+ * 2. Register RTC-CMOS platform device on Malta.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/serial_8250.h>
+#include <linux/mc146818rtc.h>
+#include <linux/platform_device.h>
#define SMC_PORT(base, int) \
{ \
@@ -45,7 +52,7 @@ static struct plat_serial8250_port uart8250_data[] = {
{ },
};
-static struct platform_device uart8250_device = {
+static struct platform_device malta_uart8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM2,
.dev = {
@@ -53,13 +60,44 @@ static struct platform_device uart8250_device = {
},
};
-static int __init uart8250_init(void)
+struct resource malta_rtc_resources[] = {
+ {
+ .start = RTC_PORT(0),
+ .end = RTC_PORT(7),
+ .flags = IORESOURCE_IO,
+ }, {
+ .start = RTC_IRQ,
+ .end = RTC_IRQ,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static struct platform_device malta_rtc_device = {
+ .name = "rtc_cmos",
+ .id = -1,
+ .resource = malta_rtc_resources,
+ .num_resources = ARRAY_SIZE(malta_rtc_resources),
+};
+
+static struct platform_device *malta_devices[] __initdata = {
+ &malta_uart8250_device,
+ &malta_rtc_device,
+};
+
+static int __init malta_add_devices(void)
{
- return platform_device_register(&uart8250_device);
-}
+ int err;
-module_init(uart8250_init);
+ err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
+ if (err)
+ return err;
+
+ /*
+ * Set RTC to BCD mode to support current alarm code.
+ */
+ CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL);
+
+ return 0;
+}
-MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("8250 UART probe driver for the Malta CBUS UART");
+device_initcall(malta_add_devices);
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