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power_supply: max17042: Use regmap_update_bits instead read and write 

Consolidate regmap_read() and regmap_write() into one
regmap_update_bits() call. This is more readable and safer because
regmap's mutex will prevent any concurrent access to modified registers
(the concurrent access could happen through max17042_init_chip() in
scheduled work).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2015-02-24 10:54:47 +01:00 committed by Sebastian Reichel
parent 52fa74ee69
commit bc352686f6
1 changed files with 4 additions and 6 deletions
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10
drivers/power/max17042_battery.c
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@ -529,7 +529,6 @@ static int max17042_init_chip(struct max17042_chip *chip)
{
struct regmap *map = chip->regmap;
int ret;
int val;
max17042_override_por_values(chip);
/* After Power up, the MAX17042 requires 500mS in order
@ -572,8 +571,7 @@ static int max17042_init_chip(struct max17042_chip *chip)
max17042_load_new_capacity_params(chip);
/* Init complete, Clear the POR bit */
regmap_read(map, MAX17042_STATUS, &val);
regmap_write(map, MAX17042_STATUS, val & (~STATUS_POR_BIT));
regmap_update_bits(map, MAX17042_STATUS, STATUS_POR_BIT, 0x0);
return 0;
}
@ -745,9 +743,9 @@ static int max17042_probe(struct i2c_client *client,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
chip->battery.name, chip);
if (!ret) {
regmap_read(chip->regmap, MAX17042_CONFIG, &val);
val |= CONFIG_ALRT_BIT_ENBL;
regmap_write(chip->regmap, MAX17042_CONFIG, val);
regmap_update_bits(chip->regmap, MAX17042_CONFIG,
CONFIG_ALRT_BIT_ENBL,
CONFIG_ALRT_BIT_ENBL);
max17042_set_soc_threshold(chip, 1);
} else {
client->irq = 0;