From: Wu Zhangjin <wuzj@xxxxxxxxxx>
by default, RTC_LIB is selected by MIPS, but if RTC_LIB is enabled,
Enhanced Real Time Clock Support(RTC) will be disabled, so, to enable
it, not select RTC_LIB in LEMOTE_FULOONG2E will fix this problem.
RTC support is needed by some tools like hwclock, if you want hwclock
work well, these two jobs need to do:
kernel configuration:
Device Drivers --->
Character devices --->
<*> Enhanced Real Time Clock Support (legacy PC RTC driver)
user-space configuration:
$ mknod /dev/rtc c 10 135
and there is another RTC support in linux, whose kernel option is
RTC_CLASS, it should be fixed for fuloong(2e) via enabling the binary
mode in driver/rtc/rtc-cmos.c and register the RTC device resource in a
machine specific rtc.c
to make hwclock work with it normally, please do:
kernel configuration:
Device Drivers --->
<*> Real Time Clock --->
<*> PC-style 'CMOS'
user-space configuration:
$ mknod /dev/rtc0 c 254 0
/dev/rtc0 is the default RTC device file.
Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
---
arch/mips/Kconfig | 2 +-
arch/mips/loongson/fuloong-2e/Makefile | 7 ++++
arch/mips/loongson/fuloong-2e/rtc.c | 55 ++++++++++++++++++++++++++++++++
drivers/rtc/rtc-cmos.c | 8 ++--
4 files changed, 67 insertions(+), 5 deletions(-)
create mode 100644 arch/mips/loongson/fuloong-2e/rtc.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 7897861..4a7e61f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -6,7 +6,7 @@ config MIPS
select HAVE_ARCH_KGDB
# Horrible source of confusion. Die, die, die ...
select EMBEDDED
- select RTC_LIB
+ select RTC_LIB if !LEMOTE_FULOONG2E
mainmenu "Linux/MIPS Kernel Configuration"
diff --git a/arch/mips/loongson/fuloong-2e/Makefile b/arch/mips/loongson/fuloong-2e/Makefile
index 035e04c..76904da 100644
--- a/arch/mips/loongson/fuloong-2e/Makefile
+++ b/arch/mips/loongson/fuloong-2e/Makefile
@@ -10,4 +10,11 @@ obj-y += setup.o init.o cmdline.o time.o reset.o irq.o \
#
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+#
+# Enable RTC Class support
+#
+# please enable CONFIG_RTC_DRV_CMOS
+#
+obj-$(CONFIG_RTC_DRV_CMOS) += rtc.o
+
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/loongson/fuloong-2e/rtc.c b/arch/mips/loongson/fuloong-2e/rtc.c
new file mode 100644
index 0000000..469ada8
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/rtc.c
@@ -0,0 +1,55 @@
+/*
+ * Registration of Cobalt RTC platform device.
+ *
+ * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@xxxxxxxxxxxxxx>
+ * Copyright (C) 2009 Wu Zhangjin <wuzj@xxxxxxxxxx>
+ *
+ * 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/init.h>
+#include <linux/ioport.h>
+#include <linux/mc146818rtc.h>
+#include <linux/platform_device.h>
+
+static struct resource rtc_cmos_resource[] = {
+ {
+ .start = RTC_PORT(0),
+ .end = RTC_PORT(1),
+ .flags = IORESOURCE_IO,
+ },
+ {
+ .start = RTC_IRQ,
+ .end = RTC_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device rtc_cmos_device = {
+ .name = "rtc_cmos",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(rtc_cmos_resource),
+ .resource = rtc_cmos_resource
+};
+
+static __init int rtc_cmos_init(void)
+{
+ platform_device_register(&rtc_cmos_device);
+
+ return 0;
+}
+
+device_initcall(rtc_cmos_init);
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 23e10b6..6f32ac5 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -691,7 +691,8 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
*/
#if defined(CONFIG_ATARI)
address_space = 64;
-#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__sparc__)
+#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) \
+ || defined(__sparc__) || defined(__mips__)
address_space = 128;
#else
#warning Assuming 128 bytes of RTC+NVRAM address space, not 64 bytes.
@@ -756,9 +757,8 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
/* FIXME teach the alarm code how to handle binary mode;
* <asm-generic/rtc.h> doesn't know 12-hour mode either.
*/
- if (is_valid_irq(rtc_irq) &&
- (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY)))) {
- dev_dbg(dev, "only 24-hr BCD mode supported\n");
+ if (is_valid_irq(rtc_irq) && !(rtc_control & RTC_24H)) {
+ dev_dbg(dev, "only 24-hr supported\n");
retval = -ENXIO;
goto cleanup1;
}
--
1.6.0.4
