The patch titled
Subject: drivers/rtc/rtc-omap.c: add external 32k clock feature
has been added to the -mm tree. Its filename is
rtc-omap-add-external-32k-clock-feature.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/rtc-omap-add-external-32k-clock-feature.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/rtc-omap-add-external-32k-clock-feature.patch
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------------------------------------------------------
From: Keerthy <j-keerthy@xxxxxx>
Subject: drivers/rtc/rtc-omap.c: add external 32k clock feature
Add external 32k clock feature. The internal clock will be gated during
suspend. Hence make use of the external 32k clock so that rtc is
functional accross suspend/resume.
Signed-off-by: Keerthy <j-keerthy@xxxxxx>
Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-omap.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff -puN drivers/rtc/rtc-omap.c~rtc-omap-add-external-32k-clock-feature drivers/rtc/rtc-omap.c
--- a/drivers/rtc/rtc-omap.c~rtc-omap-add-external-32k-clock-feature
+++ a/drivers/rtc/rtc-omap.c
@@ -107,6 +107,8 @@
/* OMAP_RTC_OSC_REG bit fields: */
#define OMAP_RTC_OSC_32KCLK_EN BIT(6)
+#define OMAP_RTC_OSC_OSC32K_GZ BIT(4)
+#define OMAP_RTC_OSC_EXT_32K BIT(3)
/* OMAP_RTC_IRQWAKEEN bit fields: */
#define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1)
@@ -120,6 +122,7 @@
struct omap_rtc_device_type {
bool has_32kclk_en;
+ bool has_osc_ext_32k;
bool has_kicker;
bool has_irqwakeen;
bool has_pmic_mode;
@@ -446,6 +449,7 @@ static const struct omap_rtc_device_type
static const struct omap_rtc_device_type omap_rtc_am3352_type = {
.has_32kclk_en = true,
+ .has_osc_ext_32k = true,
.has_kicker = true,
.has_irqwakeen = true,
.has_pmic_mode = true,
@@ -543,7 +547,16 @@ static int __init omap_rtc_probe(struct
if (rtc->type->has_32kclk_en) {
reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
rtc_writel(rtc, OMAP_RTC_OSC_REG,
- reg | OMAP_RTC_OSC_32KCLK_EN);
+ reg | OMAP_RTC_OSC_32KCLK_EN);
+ }
+
+ /* Enable External clock as the source */
+
+ if (rtc->type->has_osc_ext_32k) {
+ rtc_writel(rtc, OMAP_RTC_OSC_REG,
+ (OMAP_RTC_OSC_EXT_32K |
+ rtc_read(rtc, OMAP_RTC_OSC_REG)) &
+ (~OMAP_RTC_OSC_OSC32K_GZ));
}
/* clear old status */
_
Patches currently in -mm which might be from j-keerthy@xxxxxx are
rtc-omap-add-external-32k-clock-feature.patch
rtc-omap-add-external-32k-clock-feature-fix.patch
linux-next.patch
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