aboutsummaryrefslogtreecommitdiff
path: root/drivers/rtc/rtc-twl.c
diff options
context:
space:
mode:
authorBalaji T K <balajitk@ti.com>2009-12-13 22:16:31 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2009-12-14 00:26:08 +0100
commita6b49ffd2d4bba53ad172b1e78ee51fe15ab195e (patch)
tree1fc03d75e700644c3846c0eaa8b560cd5993d4ec /drivers/rtc/rtc-twl.c
parente8deb28ca8e221de0239eafb3c3d431d8854278e (diff)
downloadvexpress-lsk-a6b49ffd2d4bba53ad172b1e78ee51fe15ab195e.tar.gz
rtc: Add twl6030 RTC support
This patch adds support for RTC in phoenix TWL6030. Register offset addresses have changed in TWL6030 rtc-twl.c will hence forth support all twl RTC (4030, 5030, 6030 ..) Signed-off-by: Balaji T K <balajitk@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/rtc/rtc-twl.c')
-rw-r--r--drivers/rtc/rtc-twl.c152
1 files changed, 111 insertions, 41 deletions
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 7cea920ff6a..c6a83a2a722 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -34,27 +34,75 @@
/*
* RTC block register offsets (use TWL_MODULE_RTC)
*/
-#define REG_SECONDS_REG 0x00
-#define REG_MINUTES_REG 0x01
-#define REG_HOURS_REG 0x02
-#define REG_DAYS_REG 0x03
-#define REG_MONTHS_REG 0x04
-#define REG_YEARS_REG 0x05
-#define REG_WEEKS_REG 0x06
-
-#define REG_ALARM_SECONDS_REG 0x07
-#define REG_ALARM_MINUTES_REG 0x08
-#define REG_ALARM_HOURS_REG 0x09
-#define REG_ALARM_DAYS_REG 0x0A
-#define REG_ALARM_MONTHS_REG 0x0B
-#define REG_ALARM_YEARS_REG 0x0C
-
-#define REG_RTC_CTRL_REG 0x0D
-#define REG_RTC_STATUS_REG 0x0E
-#define REG_RTC_INTERRUPTS_REG 0x0F
-
-#define REG_RTC_COMP_LSB_REG 0x10
-#define REG_RTC_COMP_MSB_REG 0x11
+enum {
+ REG_SECONDS_REG = 0,
+ REG_MINUTES_REG,
+ REG_HOURS_REG,
+ REG_DAYS_REG,
+ REG_MONTHS_REG,
+ REG_YEARS_REG,
+ REG_WEEKS_REG,
+
+ REG_ALARM_SECONDS_REG,
+ REG_ALARM_MINUTES_REG,
+ REG_ALARM_HOURS_REG,
+ REG_ALARM_DAYS_REG,
+ REG_ALARM_MONTHS_REG,
+ REG_ALARM_YEARS_REG,
+
+ REG_RTC_CTRL_REG,
+ REG_RTC_STATUS_REG,
+ REG_RTC_INTERRUPTS_REG,
+
+ REG_RTC_COMP_LSB_REG,
+ REG_RTC_COMP_MSB_REG,
+};
+const static u8 twl4030_rtc_reg_map[] = {
+ [REG_SECONDS_REG] = 0x00,
+ [REG_MINUTES_REG] = 0x01,
+ [REG_HOURS_REG] = 0x02,
+ [REG_DAYS_REG] = 0x03,
+ [REG_MONTHS_REG] = 0x04,
+ [REG_YEARS_REG] = 0x05,
+ [REG_WEEKS_REG] = 0x06,
+
+ [REG_ALARM_SECONDS_REG] = 0x07,
+ [REG_ALARM_MINUTES_REG] = 0x08,
+ [REG_ALARM_HOURS_REG] = 0x09,
+ [REG_ALARM_DAYS_REG] = 0x0A,
+ [REG_ALARM_MONTHS_REG] = 0x0B,
+ [REG_ALARM_YEARS_REG] = 0x0C,
+
+ [REG_RTC_CTRL_REG] = 0x0D,
+ [REG_RTC_STATUS_REG] = 0x0E,
+ [REG_RTC_INTERRUPTS_REG] = 0x0F,
+
+ [REG_RTC_COMP_LSB_REG] = 0x10,
+ [REG_RTC_COMP_MSB_REG] = 0x11,
+};
+const static u8 twl6030_rtc_reg_map[] = {
+ [REG_SECONDS_REG] = 0x00,
+ [REG_MINUTES_REG] = 0x01,
+ [REG_HOURS_REG] = 0x02,
+ [REG_DAYS_REG] = 0x03,
+ [REG_MONTHS_REG] = 0x04,
+ [REG_YEARS_REG] = 0x05,
+ [REG_WEEKS_REG] = 0x06,
+
+ [REG_ALARM_SECONDS_REG] = 0x08,
+ [REG_ALARM_MINUTES_REG] = 0x09,
+ [REG_ALARM_HOURS_REG] = 0x0A,
+ [REG_ALARM_DAYS_REG] = 0x0B,
+ [REG_ALARM_MONTHS_REG] = 0x0C,
+ [REG_ALARM_YEARS_REG] = 0x0D,
+
+ [REG_RTC_CTRL_REG] = 0x10,
+ [REG_RTC_STATUS_REG] = 0x11,
+ [REG_RTC_INTERRUPTS_REG] = 0x12,
+
+ [REG_RTC_COMP_LSB_REG] = 0x13,
+ [REG_RTC_COMP_MSB_REG] = 0x14,
+};
/* RTC_CTRL_REG bitfields */
#define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01
@@ -84,6 +132,7 @@
#define ALL_TIME_REGS 6
/*----------------------------------------------------------------------*/
+static u8 *rtc_reg_map;
/*
* Supports 1 byte read from TWL RTC register.
@@ -92,7 +141,7 @@ static int twl_rtc_read_u8(u8 *data, u8 reg)
{
int ret;
- ret = twl_i2c_read_u8(TWL_MODULE_RTC, data, reg);
+ ret = twl_i2c_read_u8(TWL_MODULE_RTC, data, (rtc_reg_map[reg]));
if (ret < 0)
pr_err("twl_rtc: Could not read TWL"
"register %X - error %d\n", reg, ret);
@@ -106,7 +155,7 @@ static int twl_rtc_write_u8(u8 data, u8 reg)
{
int ret;
- ret = twl_i2c_write_u8(TWL_MODULE_RTC, data, reg);
+ ret = twl_i2c_write_u8(TWL_MODULE_RTC, data, (rtc_reg_map[reg]));
if (ret < 0)
pr_err("twl_rtc: Could not write TWL"
"register %X - error %d\n", reg, ret);
@@ -202,7 +251,7 @@ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm)
return ret;
ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data,
- REG_SECONDS_REG, ALL_TIME_REGS);
+ (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
if (ret < 0) {
dev_err(dev, "rtc_read_time error %d\n", ret);
@@ -244,7 +293,7 @@ static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm)
/* update all the time registers in one shot */
ret = twl_i2c_write(TWL_MODULE_RTC, rtc_data,
- REG_SECONDS_REG, ALL_TIME_REGS);
+ (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
if (ret < 0) {
dev_err(dev, "rtc_set_time error %d\n", ret);
goto out;
@@ -267,7 +316,7 @@ static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
int ret;
ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data,
- REG_ALARM_SECONDS_REG, ALL_TIME_REGS);
+ (rtc_reg_map[REG_ALARM_SECONDS_REG]), ALL_TIME_REGS);
if (ret < 0) {
dev_err(dev, "rtc_read_alarm error %d\n", ret);
return ret;
@@ -306,7 +355,7 @@ static int twl_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
/* update all the alarm registers in one shot */
ret = twl_i2c_write(TWL_MODULE_RTC, alarm_data,
- REG_ALARM_SECONDS_REG, ALL_TIME_REGS);
+ (rtc_reg_map[REG_ALARM_SECONDS_REG]), ALL_TIME_REGS);
if (ret) {
dev_err(dev, "rtc_set_alarm error %d\n", ret);
goto out;
@@ -352,21 +401,23 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc)
if (res)
goto out;
- /* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1
- * needs 2 reads to clear the interrupt. One read is done in
- * do_twl_pwrirq(). Doing the second read, to clear
- * the bit.
- *
- * FIXME the reason PWR_ISR1 needs an extra read is that
- * RTC_IF retriggered until we cleared REG_ALARM_M above.
- * But re-reading like this is a bad hack; by doing so we
- * risk wrongly clearing status for some other IRQ (losing
- * the interrupt). Be smarter about handling RTC_UF ...
- */
- res = twl_i2c_read_u8(TWL4030_MODULE_INT,
+ if (twl_class_is_4030()) {
+ /* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1
+ * needs 2 reads to clear the interrupt. One read is done in
+ * do_twl_pwrirq(). Doing the second read, to clear
+ * the bit.
+ *
+ * FIXME the reason PWR_ISR1 needs an extra read is that
+ * RTC_IF retriggered until we cleared REG_ALARM_M above.
+ * But re-reading like this is a bad hack; by doing so we
+ * risk wrongly clearing status for some other IRQ (losing
+ * the interrupt). Be smarter about handling RTC_UF ...
+ */
+ res = twl_i2c_read_u8(TWL4030_MODULE_INT,
&rd_reg, TWL4030_INT_PWR_ISR1);
- if (res)
- goto out;
+ if (res)
+ goto out;
+ }
/* Notify RTC core on event */
rtc_update_irq(rtc, 1, events);
@@ -432,6 +483,13 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev)
goto out1;
}
+ if (twl_class_is_6030()) {
+ twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK,
+ REG_INT_MSK_LINE_A);
+ twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK,
+ REG_INT_MSK_STS_A);
+ }
+
/* Check RTC module status, Enable if it is off */
ret = twl_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG);
if (ret < 0)
@@ -472,6 +530,13 @@ static int __devexit twl_rtc_remove(struct platform_device *pdev)
mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+ if (twl_class_is_6030()) {
+ twl6030_interrupt_mask(TWL6030_RTC_INT_MASK,
+ REG_INT_MSK_LINE_A);
+ twl6030_interrupt_mask(TWL6030_RTC_INT_MASK,
+ REG_INT_MSK_STS_A);
+ }
+
free_irq(irq, rtc);
@@ -526,6 +591,11 @@ static struct platform_driver twl4030rtc_driver = {
static int __init twl_rtc_init(void)
{
+ if (twl_class_is_4030())
+ rtc_reg_map = (u8 *) twl4030_rtc_reg_map;
+ else
+ rtc_reg_map = (u8 *) twl6030_rtc_reg_map;
+
return platform_driver_register(&twl4030rtc_driver);
}
module_init(twl_rtc_init);