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| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-10-07 15:47:23 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-10-07 15:49:36 +0200 |
| commit | 860c45b56d9367f220f6ff786588ccd2d6c44065 (patch) | |
| tree | aca96b9efaf9c593dff3dd5c624d4a1b5202e2e1 /drivers/rtc/rtc-ds1347.c | |
| parent | rtc: ds1347: properly handle oscillator failures (diff) | |
| download | linux-860c45b56d9367f220f6ff786588ccd2d6c44065.tar.xz linux-860c45b56d9367f220f6ff786588ccd2d6c44065.zip | |
rtc: ds1347: use regmap_update_bits
Use regmap_update_bits instead of open coding. Also add proper error
handling.
Link: https://lore.kernel.org/r/20191007134724.15505-9-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc/rtc-ds1347.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1347.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-ds1347.c b/drivers/rtc/rtc-ds1347.c index eeaf43586bce..a49ce9991916 100644 --- a/drivers/rtc/rtc-ds1347.c +++ b/drivers/rtc/rtc-ds1347.c @@ -29,6 +29,8 @@ #define DS1347_STATUS_REG 0x17 #define DS1347_CLOCK_BURST 0x3F +#define DS1347_WP_BIT BIT(7) + #define DS1347_NEOSC_BIT BIT(7) #define DS1347_OSF_BIT BIT(2) @@ -117,7 +119,7 @@ static int ds1347_probe(struct spi_device *spi) struct rtc_device *rtc; struct regmap_config config; struct regmap *map; - unsigned int data; + int err; memset(&config, 0, sizeof(config)); config.reg_bits = 8; @@ -141,9 +143,9 @@ static int ds1347_probe(struct spi_device *spi) spi_set_drvdata(spi, map); /* Disable the write protect of rtc */ - regmap_read(map, DS1347_CONTROL_REG, &data); - data = data & ~(1<<7); - regmap_write(map, DS1347_CONTROL_REG, data); + err = regmap_update_bits(map, DS1347_CONTROL_REG, DS1347_WP_BIT, 0); + if (err) + return err; rtc = devm_rtc_allocate_device(&spi->dev); if (IS_ERR(rtc)) |