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| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-10-19 22:49:37 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-10-19 22:56:03 +0200 |
| commit | ac08888b2590f690bed1f1afe7a39bdda76eb41f (patch) | |
| tree | 92e339691ac81525de465afbc819fc1d051ec4d1 /drivers/rtc | |
| parent | 580daaf43afc7024d10d23021093e9e76181e338 (diff) | |
| download | blackbird-op-linux-ac08888b2590f690bed1f1afe7a39bdda76eb41f.tar.gz blackbird-op-linux-ac08888b2590f690bed1f1afe7a39bdda76eb41f.zip | |
rtc: ds1343: use regmap_update_bits for glitch filter
Use regmap_update_bits to update DS1343_CONTROL_REG in a race free manner
when setting the glitch filter.
Link: https://lore.kernel.org/r/20191019204941.6203-5-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-ds1343.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c index ec8d1e82d7ac..28f9463322d0 100644 --- a/drivers/rtc/rtc-ds1343.c +++ b/drivers/rtc/rtc-ds1343.c @@ -108,20 +108,18 @@ static ssize_t ds1343_store_glitchfilter(struct device *dev, const char *buf, size_t count) { struct ds1343_priv *priv = dev_get_drvdata(dev->parent); - int data; - - regmap_read(priv->map, DS1343_CONTROL_REG, &data); + int data = 0; + int res; if (strncmp(buf, "enabled", 7) == 0) - data |= DS1343_EGFIL; - - else if (strncmp(buf, "disabled", 8) == 0) - data &= ~(DS1343_EGFIL); - - else + data = DS1343_EGFIL; + else if (strncmp(buf, "disabled", 8)) return -EINVAL; - regmap_write(priv->map, DS1343_CONTROL_REG, data); + res = regmap_update_bits(priv->map, DS1343_CONTROL_REG, + DS1343_EGFIL, data); + if (res) + return res; return count; } |
