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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2013-12-10 07:22:40 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2013-12-10 07:22:40 +0100 |
| commit | 5d43889c07bb38694742936aa70d1187c012e198 (patch) | |
| tree | 73809dddae39ae3b746396e9779142dbd1973f33 /drivers/mfd/da9052-i2c.c | |
| parent | Input: ALPS - add support for DualPoint device on Dell XT2 model (diff) | |
| parent | Linux 3.13-rc3 (diff) | |
| download | linux-5d43889c07bb38694742936aa70d1187c012e198.tar.xz linux-5d43889c07bb38694742936aa70d1187c012e198.zip | |
Merge tag 'v3.13-rc3' into for-linus
Merging with the mainline to sync up on changes to serio core.
Diffstat (limited to 'drivers/mfd/da9052-i2c.c')
| -rw-r--r-- | drivers/mfd/da9052-i2c.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/mfd/da9052-i2c.c b/drivers/mfd/da9052-i2c.c index 6a9fec40d018..c319c4ef5d49 100644 --- a/drivers/mfd/da9052-i2c.c +++ b/drivers/mfd/da9052-i2c.c @@ -86,7 +86,11 @@ static int da9052_i2c_fix(struct da9052 *da9052, unsigned char reg) return 0; } -static int da9052_i2c_enable_multiwrite(struct da9052 *da9052) +/* + * According to errata item 24, multiwrite mode should be avoided + * in order to prevent register data corruption after power-down. + */ +static int da9052_i2c_disable_multiwrite(struct da9052 *da9052) { int reg_val, ret; @@ -94,8 +98,8 @@ static int da9052_i2c_enable_multiwrite(struct da9052 *da9052) if (ret < 0) return ret; - if (reg_val & DA9052_CONTROL_B_WRITEMODE) { - reg_val &= ~DA9052_CONTROL_B_WRITEMODE; + if (!(reg_val & DA9052_CONTROL_B_WRITEMODE)) { + reg_val |= DA9052_CONTROL_B_WRITEMODE; ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG, reg_val); if (ret < 0) @@ -154,7 +158,7 @@ static int da9052_i2c_probe(struct i2c_client *client, return ret; } - ret = da9052_i2c_enable_multiwrite(da9052); + ret = da9052_i2c_disable_multiwrite(da9052); if (ret < 0) return ret; |