[PATCH v2] Support RTC on Malta

[PATCH v2] Support RTC on Malta

[Tiejun Chen]

To create platform device for RTC to call platform driver successfully.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
---
 arch/mips/configs/malta_defconfig    |    8 ++++-
 arch/mips/mti-malta/malta-platform.c |   47 +++++++++++++++++++++++++++++----
 2 files changed, 47 insertions(+), 8 deletions(-)

diff --git a/arch/mips/configs/malta_defconfig b/arch/mips/configs/malta_defconfig
index 74daa0c..aec64d0 100644
--- a/arch/mips/configs/malta_defconfig
+++ b/arch/mips/configs/malta_defconfig
@@ -1126,7 +1126,6 @@ CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
 # CONFIG_WATCHDOG is not set
 CONFIG_HW_RANDOM=m
-CONFIG_RTC=y
 # CONFIG_R3964 is not set
 # CONFIG_APPLICOM is not set
 # CONFIG_DRM is not set
@@ -1199,7 +1198,12 @@ CONFIG_USB_ARCH_HAS_EHCI=y
 # CONFIG_MMC is not set
 # CONFIG_NEW_LEDS is not set
 # CONFIG_INFINIBAND is not set
-# CONFIG_RTC_CLASS is not set
+CONFIG_RTC_CLASS=y
+
+#
+# Platform RTC drivers
+#
+CONFIG_RTC_DRV_CMOS=y
 
 #
 # DMA Engine support
diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c
index 83b9bab..039e6e6 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)						\
 {									\
@@ -53,13 +60,41 @@ static struct platform_device uart8250_device = {
 	},
 };
 
-static int __init uart8250_init(void)
+static int __init malta_uart8250_init(void)
 {
 	return platform_device_register(&uart8250_device);
 }
 
-module_init(uart8250_init);
+struct resource malta_rtc_resource[] = {
+	{
+		.start	= RTC_PORT(0),			
+		.end	= RTC_PORT(7),
+		.flags	= IORESOURCE_IO,
+	}, {
+		.start	= RTC_IRQ,
+		.end	= RTC_IRQ,
+		.flags	= IORESOURCE_IRQ,
+	}
+};
+
+static int __init malta_rtc_init(void)
+{
+	struct platform_device *pd;
+	
+	pd = platform_device_register_simple("rtc_cmos", -1, malta_rtc_resource, 
+						ARRAY_SIZE(malta_rtc_resource));
+
+	if (IS_ERR(pd))
+		return PTR_ERR(pd);
+	
+	/* Try setting rtc as BCD mode to support
+	 * current alarm code if possible.
+	 */
+	if (!RTC_ALWAYS_BCD)
+		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_rtc_init);
+device_initcall(malta_uart8250_init);
-- 
1.5.5.1