pcf50633_rtc.patch

Move the RTC subdevice driver into drivers/rtc/rtc-pcf50633.c

3 files changed, 279 insertions, 0 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 8abbb2020af..e8a1c7c5420 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -219,6 +219,12 @@ config RTC_DRV_PCF8583
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-pcf8583.
 
+config RTC_DRV_PCF50633
+	tristate "Philips PCF50633"
+	help
+	  If you say yes here you get support for the Philips PCF50633
+	  PMU's RTC driver.
+
 config RTC_DRV_M41T80
 	tristate "ST M41T65/M41T80/81/82/83/84/85/87"
 	help
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index e9e8474cc8f..ab3a003991e 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_RTC_DRV_MAX6902)	+= rtc-max6902.o
 obj-$(CONFIG_RTC_DRV_OMAP)	+= rtc-omap.o
 obj-$(CONFIG_RTC_DRV_PCF8563)	+= rtc-pcf8563.o
 obj-$(CONFIG_RTC_DRV_PCF8583)	+= rtc-pcf8583.o
+obj-$(CONFIG_RTC_DRV_PCF50633)	+= rtc-pcf50633.o
 obj-$(CONFIG_RTC_DRV_PL030)	+= rtc-pl030.o
 obj-$(CONFIG_RTC_DRV_PL031)	+= rtc-pl031.o
 obj-$(CONFIG_RTC_DRV_PARISC)	+= rtc-parisc.o
diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c
new file mode 100644
index 00000000000..74b7e569d39
--- /dev/null
+++ b/drivers/rtc/rtc-pcf50633.c
@@ -0,0 +1,272 @@
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+#include <linux/bcd.h>
+#include <linux/pcf50633.h>
+#include <linux/rtc/pcf50633.h>
+#include <linux/i2c.h>
+
+enum pcf50633_time_indexes {
+	PCF50633_TI_SEC = 0,
+	PCF50633_TI_MIN,
+	PCF50633_TI_HOUR,
+	PCF50633_TI_WKDAY,
+	PCF50633_TI_DAY,
+	PCF50633_TI_MONTH,
+	PCF50633_TI_YEAR,
+	PCF50633_TI_EXTENT /* always last */
+};
+
+
+struct pcf50633_time {
+	u_int8_t time[PCF50633_TI_EXTENT];
+};
+
+static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf)
+{
+	rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);
+	rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);
+	rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);
+	rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);
+	rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);
+	rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]);
+	rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;
+}
+
+static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc)
+{
+	pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);
+	pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);
+	pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);
+	pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);
+	pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);
+	pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon);
+	pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year - 100);
+}
+
+static int pcf50633_rtc_ioctl(struct device *dev, unsigned int cmd,
+			      unsigned long arg)
+{
+	struct pcf50633_data *pcf = dev->platform_data;
+
+	switch (cmd) {
+	case RTC_AIE_OFF:
+		/* disable the alarm interrupt */
+		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_INT1M,
+				 PCF50633_INT1_ALARM, PCF50633_INT1_ALARM);
+		return 0;
+	case RTC_AIE_ON:
+		/* enable the alarm interrupt */
+		pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M, PCF50633_INT1_ALARM);
+		return 0;
+	case RTC_PIE_OFF:
+		/* disable periodic interrupt (hz tick) */
+		pcf->flags &= ~PCF50633_F_RTC_SECOND;
+		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_INT1M,
+				 PCF50633_INT1_SECOND, PCF50633_INT1_SECOND);
+		return 0;
+	case RTC_PIE_ON:
+		/* ensable periodic interrupt (hz tick) */
+		pcf->flags |= PCF50633_F_RTC_SECOND;
+		pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M, PCF50633_INT1_SECOND);
+		return 0;
+	}
+	return -ENOIOCTLCMD;
+}
+
+#ifdef PCF50633_RTC
+void pcf50633_rtc_handle_event(struct pcf50633_data *pcf,
+					enum pcf50633_rtc_event evt)
+{
+	switch(evt) {
+		case PCF50633_RTC_EVENT_ALARM:
+			rtc_update_irq(pcf->rtc, 1, RTC_AF | RTC_IRQF);
+			break;
+		case PCF50633_RTC_EVENT_SECOND:
+			rtc_update_irq(pcf->rtc, 1, RTC_PF | RTC_IRQF);
+	}
+}
+#else
+void pcf50633_rtc_handle_event(struct pcf50633_data *pcf,
+					enum pcf50633_rtc_event evt)
+{
+
+}
+#endif
+
+static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct pcf50633_data *pcf = dev->platform_data;
+	struct pcf50633_time pcf_tm;
+	int ret;
+
+	mutex_lock(&pcf->lock);
+
+	ret = i2c_smbus_read_i2c_block_data(pcf->client,
+					    PCF50633_REG_RTCSC,
+					    PCF50633_TI_EXTENT,
+					    &pcf_tm.time[0]);
+	if (ret != PCF50633_TI_EXTENT)
+		dev_err(dev, "Failed to read time :-(\n");
+
+	mutex_unlock(&pcf->lock);
+
+	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
+		pcf_tm.time[PCF50633_TI_DAY],
+		pcf_tm.time[PCF50633_TI_MONTH],
+		pcf_tm.time[PCF50633_TI_YEAR],
+		pcf_tm.time[PCF50633_TI_HOUR],
+		pcf_tm.time[PCF50633_TI_MIN],
+		pcf_tm.time[PCF50633_TI_SEC]);
+
+	pcf2rtc_time(tm, &pcf_tm);
+
+	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
+		tm->tm_mday, tm->tm_mon, tm->tm_year,
+		tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	return 0;
+}
+
+static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct pcf50633_data *pcf = dev->platform_data;
+	struct pcf50633_time pcf_tm;
+	int ret;
+
+	dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
+		tm->tm_mday, tm->tm_mon, tm->tm_year,
+		tm->tm_hour, tm->tm_min, tm->tm_sec);
+	rtc2pcf_time(&pcf_tm, tm);
+	dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
+		pcf_tm.time[PCF50633_TI_DAY],
+		pcf_tm.time[PCF50633_TI_MONTH],
+		pcf_tm.time[PCF50633_TI_YEAR],
+		pcf_tm.time[PCF50633_TI_HOUR],
+		pcf_tm.time[PCF50633_TI_MIN],
+		pcf_tm.time[PCF50633_TI_SEC]);
+
+	mutex_lock(&pcf->lock);
+	/* FIXME: disable second interrupt */
+
+	ret = i2c_smbus_write_i2c_block_data(pcf->client,
+					     PCF50633_REG_RTCSC,
+					     PCF50633_TI_EXTENT,
+					     &pcf_tm.time[0]);
+	if (ret)
+		dev_err(dev, "Failed to set time %d\n", ret);
+
+	/* FIXME: re-enable second interrupt */
+	mutex_unlock(&pcf->lock);
+
+	return 0;
+}
+
+static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct pcf50633_data *pcf = dev->platform_data;
+	struct pcf50633_time pcf_tm;
+	int ret;
+	u_int8_t reg;
+
+	mutex_lock(&pcf->lock);
+	
+	pcf50633_read(pcf, PCF50633_REG_INT1M, 1, &reg);     
+	alrm->enabled = reg & PCF50633_INT1_ALARM ? 0 : 1;
+
+	ret = pcf50633_read(pcf, PCF50633_REG_RTCSCA,
+				PCF50633_TI_EXTENT, &pcf_tm.time[0]);
+
+	if (ret != PCF50633_TI_EXTENT)
+		dev_err(dev, "Failed to read Alarm time :-(\n");
+
+	mutex_unlock(&pcf->lock);
+
+	pcf2rtc_time(&alrm->time, &pcf_tm);
+
+	return 0;
+}
+
+static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+	struct pcf50633_data *pcf = dev->platform_data;
+	struct pcf50633_time pcf_tm;
+	u_int8_t irqmask;
+	int ret;
+
+	rtc2pcf_time(&pcf_tm, &alrm->time);
+
+	mutex_lock(&pcf->lock);
+
+	/* disable alarm interrupt */
+	pcf50633_read(pcf, PCF50633_REG_INT1M, 1, &irqmask);
+	irqmask |= PCF50633_INT1_ALARM;
+	pcf50633_write(pcf, PCF50633_REG_INT1M, 1, &irqmask);
+
+	ret = pcf50633_write(pcf, PCF50633_REG_RTCSCA,
+					PCF50633_TI_EXTENT, &pcf_tm.time[0]);
+	if (ret)
+		dev_err(dev, "Failed to write alarm time :-( %d\n", ret);
+
+	if (alrm->enabled) {
+		/* (re-)enaable alarm interrupt */
+		pcf50633_read(pcf, PCF50633_REG_INT1M, 1, &irqmask);
+		irqmask &= ~PCF50633_INT1_ALARM;
+		pcf50633_write(pcf, PCF50633_REG_INT1M, 1, &irqmask);
+	}
+
+	mutex_unlock(&pcf->lock);
+
+	/* FIXME */
+	return 0;
+}
+static struct rtc_class_ops pcf50633_rtc_ops = {
+	.ioctl		= pcf50633_rtc_ioctl,
+	.read_time	= pcf50633_rtc_read_time,
+	.set_time	= pcf50633_rtc_set_time,
+	.read_alarm	= pcf50633_rtc_read_alarm,
+	.set_alarm	= pcf50633_rtc_set_alarm,
+};
+
+static int pcf50633_rtc_probe(struct platform_device *pdev)
+{
+	struct rtc_device *rtc;
+
+	rtc = rtc_device_register("pcf50633", &pdev->dev,
+					&pcf50633_rtc_ops, THIS_MODULE);
+	if (IS_ERR(rtc))
+		return -ENODEV;
+	
+	return 0;
+}
+
+static int pcf50633_rtc_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+
+static struct platform_driver pcf50633_rtc_driver = {
+	.driver = {
+		.name = "pcf50633-rtc",
+	},
+	.probe = pcf50633_rtc_probe,
+	.remove = __devexit_p(pcf50633_rtc_remove),
+};
+
+static int __init pcf50633_rtc_init(void)
+{
+	return platform_driver_register(&pcf50633_rtc_driver);
+}
+module_init(pcf50633_rtc_init);
+
+static void __exit pcf50633_rtc_exit(void)
+{
+	platform_driver_unregister(&pcf50633_rtc_driver);
+}
+module_exit(pcf50633_rtc_exit);
+
+
+MODULE_DESCRIPTION("RTC driver for NXP PCF50633 power management unit");
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_LICENSE("GPL");
+