arch/mips/dec: switch DECstation systems to rtc-cmos

This adds an RTC platform device for DECstation systems so that they can
use the rtc-cmos driver for their RTC device.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 45 insertions, 1 deletions

diff --git a/arch/mips/dec/Makefile b/arch/mips/dec/Makefile
index 3d5d2c56de8d..bd74e05c90b0 100644
--- a/arch/mips/dec/Makefile
+++ b/arch/mips/dec/Makefile
@@ -3,7 +3,7 @@
 #
 
 obj-y           := ecc-berr.o int-handler.o ioasic-irq.o kn01-berr.o \
-                   kn02-irq.o kn02xa-berr.o reset.o setup.o time.o
+                   kn02-irq.o kn02xa-berr.o platform.o reset.o setup.o time.o
 
 obj-$(CONFIG_TC)                += tc.o
 obj-$(CONFIG_CPU_HAS_WB)        += wbflush.o
diff --git a/arch/mips/dec/platform.c b/arch/mips/dec/platform.c
new file mode 100644
index 000000000000..c7ac86af847a
--- /dev/null
+++ b/arch/mips/dec/platform.c
@@ -0,0 +1,44 @@
+/*
+ *      DEC platform devices.
+ *
+ *      Copyright (c) 2014  Maciej W. Rozycki
+ *
+ *      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/ioport.h>
+#include <linux/kernel.h>
+#include <linux/mc146818rtc.h>
+#include <linux/platform_device.h>
+
+static struct resource dec_rtc_resources[] = {
+        {
+                .name = "rtc",
+                .flags = IORESOURCE_MEM,
+        },
+};
+
+static struct cmos_rtc_board_info dec_rtc_info = {
+        .flags = CMOS_RTC_FLAGS_NOFREQ,
+        .address_space = 64,
+};
+
+static struct platform_device dec_rtc_device = {
+        .name = "rtc_cmos",
+        .id = PLATFORM_DEVID_NONE,
+        .dev.platform_data = &dec_rtc_info,
+        .resource = dec_rtc_resources,
+        .num_resources = ARRAY_SIZE(dec_rtc_resources),
+};
+
+static int __init dec_add_devices(void)
+{
+        dec_rtc_resources[0].start = RTC_PORT(0);
+        dec_rtc_resources[0].end = RTC_PORT(0) + dec_kn_slot_size - 1;
+        return platform_device_register(&dec_rtc_device);
+}
+
+device_initcall(dec_add_devices);