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[PATCH] Support RTC on Malta

To: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: [PATCH] Support RTC on Malta
From: Tiejun Chen <tiejun.chen@windriver.com>
Date: Thu, 30 Oct 2008 19:15:44 +0800
Cc: Tiejun Chen <tiejun.chen@windriver.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
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 |    4 +-
 arch/mips/mti-malta/Makefile      |    2 +-
 arch/mips/mti-malta/malta-rtc.c   |   73 +++++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+), 3 deletions(-)
 create mode 100644 arch/mips/mti-malta/malta-rtc.c

diff --git a/arch/mips/configs/malta_defconfig 
b/arch/mips/configs/malta_defconfig
index 74daa0c..f84bdf6 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 +1198,8 @@ 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
+CONFIG_RTC_DRV_CMOS=y
 
 #
 # DMA Engine support
diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile
index cef2db8..26284fc 100644
--- a/arch/mips/mti-malta/Makefile
+++ b/arch/mips/mti-malta/Makefile
@@ -9,7 +9,7 @@ obj-y                           := malta-amon.o malta-cmdline.o 
\
                                   malta-display.o malta-init.o malta-int.o \
                                   malta-memory.o malta-mtd.o \
                                   malta-platform.o malta-reset.o \
-                                  malta-setup.o malta-time.o
+                                  malta-setup.o malta-time.o malta-rtc.o
 
 obj-$(CONFIG_EARLY_PRINTK)     += malta-console.o
 obj-$(CONFIG_PCI)              += malta-pci.o
diff --git a/arch/mips/mti-malta/malta-rtc.c b/arch/mips/mti-malta/malta-rtc.c
new file mode 100644
index 0000000..b987c31
--- /dev/null
+++ b/arch/mips/mti-malta/malta-rtc.c
@@ -0,0 +1,73 @@
+/*
+ *  Registration of Malta RTC platform device.
+ *
+ *  Copyright (C) 2008  Tiejun Chen <tiejun.chen@windriver.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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  
USA
+ */
+
+#include <linux/mc146818rtc.h>
+#include <linux/platform_device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+
+static struct resource malta_platform_rtc_resource[] __initdata = {
+       {
+               .start  = RTC_PORT(0),
+               .end    = RTC_PORT(7),
+               .flags  = IORESOURCE_IO,
+       },
+       {
+               .start  = RTC_IRQ,
+               .end    = RTC_IRQ,
+               .flags  = IORESOURCE_IRQ,
+       },
+};
+
+static __init int malta_platform_rtc_add(void)
+{
+       struct platform_device *pdev;
+       int ret;
+
+       pdev = platform_device_alloc("rtc_cmos", -1);
+       if (!pdev)
+               return -ENOMEM;
+
+       ret = platform_device_add_resources(pdev, malta_platform_rtc_resource,
+                                              
ARRAY_SIZE(malta_platform_rtc_resource));
+       if (ret)
+               goto err;
+
+       ret = platform_device_add(pdev);
+       if (ret)
+               goto err;
+
+       /* 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;
+
+err:
+       platform_device_put(pdev);
+
+       return ret;
+}
+
+device_initcall(malta_platform_rtc_add);
+
-- 
1.5.5.1


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