diff options
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)) |