MIPS: Loongson: Define rtc device on MC146818-equipped systems

This patch declare the rtc device present on systems with clock compatible
with the mc146818 and handled by rtc-cmos.  Introduce a new Kconfig entry
because there are some systems without rtc_cmos compatible clock.

Signed-off-by: Arnaud Patard <apatard@mandriva.com>
To: linux-mips@linux-mips.org
Cc: aba@not.so.argh.org
Patchwork: http://patchwork.linux-mips.org/patch/1320/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 50 insertions, 0 deletions

diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig
index 3df1967dea08..c97ca69b94e0 100644
--- a/arch/mips/loongson/Kconfig
+++ b/arch/mips/loongson/Kconfig
@@ -23,6 +23,7 @@ config LEMOTE_FULOONG2E
         select GENERIC_HARDIRQS_NO__DO_IRQ
         select GENERIC_ISA_DMA_SUPPORT_BROKEN
         select CPU_HAS_WB
+        select LOONGSON_MC146818
         help
           Lemote Fuloong(2e) mini-PC board based on the Chinese Loongson-2E CPU and
           an FPGA northbridge
@@ -51,6 +52,7 @@ config LEMOTE_MACH2F
         select SYS_SUPPORTS_64BIT_KERNEL
         select SYS_SUPPORTS_HIGHMEM
         select SYS_SUPPORTS_LITTLE_ENDIAN
+        select LOONGSON_MC146818
         help
           Lemote Loongson 2F family machines utilize the 2F revision of
           Loongson processor and the AMD CS5536 south bridge.
@@ -83,3 +85,7 @@ config LOONGSON_UART_BASE
         bool
         default y
         depends on EARLY_PRINTK || SERIAL_8250
+
+config LOONGSON_MC146818
+        bool
+        default n
diff --git a/arch/mips/loongson/common/Makefile b/arch/mips/loongson/common/Makefile
index cdd2e812ba1a..e526488df655 100644
--- a/arch/mips/loongson/common/Makefile
+++ b/arch/mips/loongson/common/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_GENERIC_GPIO) += gpio.o
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 obj-$(CONFIG_SERIAL_8250) += serial.o
 obj-$(CONFIG_LOONGSON_UART_BASE) += uart_base.o
+obj-$(CONFIG_LOONGSON_MC146818) += rtc.o
 
 #
 # Enable CS5536 Virtual Support Module(VSM) to virtulize the PCI configure
diff --git a/arch/mips/loongson/common/rtc.c b/arch/mips/loongson/common/rtc.c
new file mode 100644
index 000000000000..a90d87c01555
--- /dev/null
+++ b/arch/mips/loongson/common/rtc.c
@@ -0,0 +1,43 @@
+/*
+ *  Lemote Fuloong platform support
+ *
+ *  Copyright(c) 2010 Arnaud Patard <apatard@mandriva.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.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/mc146818rtc.h>
+
+struct resource loongson_rtc_resources[] = {
+        {
+                .start  = RTC_PORT(0),
+                .end    = RTC_PORT(1),
+                .flags  = IORESOURCE_IO,
+        }, {
+                .start  = RTC_IRQ,
+                .end    = RTC_IRQ,
+                .flags  = IORESOURCE_IRQ,
+        }
+};
+
+static struct platform_device loongson_rtc_device = {
+        .name           = "rtc_cmos",
+        .id             = -1,
+        .resource       = loongson_rtc_resources,
+        .num_resources  = ARRAY_SIZE(loongson_rtc_resources),
+};
+
+
+static int __init loongson_rtc_platform_init(void)
+{
+        platform_device_register(&loongson_rtc_device);
+        return 0;
+}
+
+device_initcall(loongson_rtc_platform_init);