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