@@ -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))
Use regmap_update_bits instead of open coding. Also add proper error handling. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> --- drivers/rtc/rtc-ds1347.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)