[09/10] rtc: ds1347: use regmap_update_bits
diff mbox series

Message ID 20191007134724.15505-9-alexandre.belloni@bootlin.com
State Accepted
Commit 860c45b56d9367f220f6ff786588ccd2d6c44065
Headers show
Series
  • [01/10] rtc: add a timestamp for year 0
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Commit Message

Alexandre Belloni Oct. 7, 2019, 1:47 p.m. UTC
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(-)

Patch
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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))