diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0529-rtc-pcf85063-Always-clear-EXT_TEST-from-set_time.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0529-rtc-pcf85063-Always-clear-EXT_TEST-from-set_time.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0529-rtc-pcf85063-Always-clear-EXT_TEST-from-set_time.patch b/target/linux/bcm27xx/patches-5.15/950-0529-rtc-pcf85063-Always-clear-EXT_TEST-from-set_time.patch new file mode 100644 index 0000000000..e8a6b41821 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0529-rtc-pcf85063-Always-clear-EXT_TEST-from-set_time.patch @@ -0,0 +1,36 @@ +From c3cfd27eb16d2fc12cfa77e6cd5f9eb352403c16 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Fri, 15 Oct 2021 11:45:36 +0100 +Subject: [PATCH] rtc: pcf85063: Always clear EXT_TEST from set_time + +Power-on reset after the insertion of a battery does not always complete +successfully, leading to corrupted register content. The EXT_TEST bit +will stop the clock from running, but currently the driver will never +recover. + +Safely handle the erroneous state by clearing EXT_TEST as part of the +usual set_time method. + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + drivers/rtc/rtc-pcf85063.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/drivers/rtc/rtc-pcf85063.c ++++ b/drivers/rtc/rtc-pcf85063.c +@@ -34,6 +34,7 @@ + #define PCF85063_REG_CTRL1 0x00 /* status */ + #define PCF85063_REG_CTRL1_CAP_SEL BIT(0) + #define PCF85063_REG_CTRL1_STOP BIT(5) ++#define PCF85063_REG_CTRL1_EXT_TEST BIT(7) + + #define PCF85063_REG_CTRL2 0x01 + #define PCF85063_CTRL2_AF BIT(6) +@@ -117,6 +118,7 @@ static int pcf85063_rtc_set_time(struct + * reset state until all time/date registers are written + */ + rc = regmap_update_bits(pcf85063->regmap, PCF85063_REG_CTRL1, ++ PCF85063_REG_CTRL1_EXT_TEST | + PCF85063_REG_CTRL1_STOP, + PCF85063_REG_CTRL1_STOP); + if (rc) |