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>
diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c
index 83b9bab..6a476f7 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 platform_device uart8250_device = {
+static struct platform_device malta_uart8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM2,
.dev = {
@@ -53,13 +60,44 @@
},
};
-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;
+
+ 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_init(uart8250_init);
-
-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);