[ep93xx] add support for the Simplemachines Sim.One board

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18540 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 78 insertions, 0 deletions

diff --git a/target/linux/ep93xx/patches-2.6.30/004-simone-rtc.patch b/target/linux/ep93xx/patches-2.6.30/004-simone-rtc.patch
new file mode 100644
index 0000000000..69f2c5a9bd
--- /dev/null
+++ b/target/linux/ep93xx/patches-2.6.30/004-simone-rtc.patch
@@ -0,0 +1,78 @@
+--- a/drivers/rtc/rtc-ds1307.c
++++ b/drivers/rtc/rtc-ds1307.c
+@@ -661,6 +661,13 @@ static int __devinit ds1307_probe(struct
+ 			goto exit_free;
+ 		}
+ 
++#if (defined(CONFIG_MACH_SIM_ONE))
++		/* SIM.ONE board needs 32khz clock on SQW/INTB pin */
++		i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL,
++					ds1307->regs[0] & ~DS1337_BIT_INTCN);
++		i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL,
++					ds1307->regs[0] | (DS1337_BIT_RS1 | DS1337_BIT_RS2));
++#endif
+ 		/* oscillator off?  turn it on, so clock can tick. */
+ 		if (ds1307->regs[0] & DS1337_BIT_nEOSC)
+ 			ds1307->regs[0] &= ~DS1337_BIT_nEOSC;
+--- a/drivers/rtc/Kconfig
++++ b/drivers/rtc/Kconfig
+@@ -570,6 +570,14 @@ config RTC_DRV_EP93XX
+ 	  This driver can also be built as a module. If so, the module
+ 	  will be called rtc-ep93xx.
+ 
++config RTC_DRV_EP93XX_DS1337
++	bool "Cirrus Logic EP93XX using DS1337 chip"
++	depends on RTC_DRV_EP93XX && I2C && MACH_SIM_ONE
++	help
++	  If you say yes here, the EP93XX driver will use the
++	  battery-backed-up DS1337 RTC chip on the SIM.ONE board.
++	  You almost certainly want this.
++
+ config RTC_DRV_SA1100
+ 	tristate "SA11x0/PXA2xx"
+ 	depends on ARCH_SA1100 || ARCH_PXA
+--- a/drivers/rtc/rtc-ep93xx.c
++++ b/drivers/rtc/rtc-ep93xx.c
+@@ -13,6 +13,13 @@
+ #include <linux/rtc.h>
+ #include <linux/platform_device.h>
+ #include <mach/hardware.h>
++#include <asm/io.h>
++
++#if defined(CONFIG_RTC_DRV_EP93XX_DS1337)
++extern int ds1337_do_command(int id, int cmd, void *arg);
++#define DS1337_GET_DATE         0
++#define DS1337_SET_DATE         1
++#endif
+ 
+ #define EP93XX_RTC_REG(x)	(EP93XX_RTC_BASE + (x))
+ #define EP93XX_RTC_DATA		EP93XX_RTC_REG(0x0000)
+@@ -37,16 +44,28 @@ static int ep93xx_get_swcomp(struct devi
+ 
+ static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm)
+ {
++#if defined(CONFIG_RTC_DRV_EP93XX_DS1337)
++	/* Reroute the internal device to the DS1337 */
++	return ds1337_do_command(0, DS1337_GET_DATE, (void *)tm);
++#else
+ 	unsigned long time = __raw_readl(EP93XX_RTC_DATA);
+ 
+ 	rtc_time_to_tm(time, tm);
+ 	return 0;
++#endif
+ }
+ 
+ static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs)
+ {
++#if defined(CONFIG_RTC_DRV_EP93XX_DS1337)
++	struct rtc_time tm;
++
++	rtc_time_to_tm(secs, &tm);
++	return ds1337_do_command(0, DS1337_SET_DATE, (void *)&tm);
++#else
+ 	__raw_writel(secs + 1, EP93XX_RTC_LOAD);
+ 	return 0;
++#endif
+ }
+ 
+ static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq)