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authorChris Packham <chris.packham@alliedtelesis.co.nz>2020-02-07 06:18:11 +0300
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2020-03-22 23:40:01 +0300
commitdf11b323b16fce74d32571c2f80074df41df002d (patch)
tree76a8f39ba7f35ceeec05770dbb550b0bbcb55e12 /drivers/rtc
parent30a790653d8ac46d3116abe99ba745a7b0c27b8b (diff)
downloadlinux-df11b323b16fce74d32571c2f80074df41df002d.tar.xz
rtc: ds1307: handle oscillator failure flags for ds1388 variant
The FLAG register is at a different location to the other supported RTCs so this requires an extra case in the existing switch statement. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Link: https://lore.kernel.org/r/20200207031812.14424-2-chris.packham@alliedtelesis.co.nz Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-ds1307.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 1f7e8aefc1eb..31a38d468378 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -144,6 +144,8 @@ enum ds_type {
# define M41TXX_BIT_CALIB_SIGN BIT(5)
# define M41TXX_M_CALIBRATION GENMASK(4, 0)
+#define DS1388_REG_FLAG 0x0b
+# define DS1388_BIT_OSF BIT(7)
/* negative offset step is -2.034ppm */
#define M41TXX_NEG_OFFSET_STEP_PPB 2034
/* positive offset step is +4.068ppm */
@@ -252,6 +254,13 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
if (tmp & DS1340_BIT_OSF)
return -EINVAL;
break;
+ case ds_1388:
+ ret = regmap_read(ds1307->regmap, DS1388_REG_FLAG, &tmp);
+ if (ret)
+ return ret;
+ if (tmp & DS1388_BIT_OSF)
+ return -EINVAL;
+ break;
case mcp794xx:
if (!(tmp & MCP794XX_BIT_ST))
return -EINVAL;