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leds: lm3642: Use regmap_update_bits() in lm3642_chip_init()

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Use regmap_update_bits() to replace regmap_read() + regmap_write().
With this patch, we only show the error message when regmap_update_bits()
fails.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: G.Shark Jeong<gshark.jeong@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
This commit is contained in:
Axel Lin 2012-09-22 14:40:14 +08:00 committed by Bryan Wu
parent 8b7cfbec05
commit e76a322af1
1 changed files with 3 additions and 12 deletions
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15
drivers/leds/leds-lm3642.c
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@ -95,23 +95,14 @@ struct lm3642_chip_data {
/* chip initialize */
static int __devinit lm3642_chip_init(struct lm3642_chip_data *chip)
{
unsigned int reg_val;
int ret;
struct lm3642_platform_data *pdata = chip->pdata;
/* set enable register */
ret = regmap_read(chip->regmap, REG_ENABLE, &reg_val);
ret = regmap_update_bits(chip->regmap, REG_ENABLE, EX_PIN_ENABLE_MASK,
pdata->tx_pin);
if (ret < 0)
goto out;
reg_val &= (~EX_PIN_ENABLE_MASK);
reg_val |= pdata->tx_pin;
ret = regmap_write(chip->regmap, REG_ENABLE, reg_val);
if (ret < 0)
goto out;
out:
dev_err(chip->dev, "Failed to read REG_ENABLE Register\n");
dev_err(chip->dev, "Failed to update REG_ENABLE Register\n");
return ret;
}