From 860c45b56d9367f220f6ff786588ccd2d6c44065 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Mon, 7 Oct 2019 15:47:23 +0200 Subject: [PATCH] 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 --- drivers/rtc/rtc-ds1347.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/rtc/rtc-ds1347.c b/drivers/rtc/rtc-ds1347.c index eeaf435..a49ce99 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)) -- 2.7.4