diff options
| -rw-r--r-- | drivers/iio/light/vcnl4000.c | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index f6c83ecaad8b..bc8c974cd8b8 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -74,6 +74,9 @@ #define VCNL4000_PROX_EN BIT(1) /* start proximity measurement */ #define VCNL4000_SELF_TIMED_EN BIT(0) /* start self-timed measurement */ +#define VCNL4040_ALS_CONF_ALS_SHUTDOWN BIT(0) +#define VCNL4040_PS_CONF1_PS_SHUTDOWN BIT(0) + /* Bit masks for interrupt registers. */ #define VCNL4010_INT_THR_SEL BIT(0) /* Select threshold interrupt source */ #define VCNL4010_INT_THR_EN BIT(1) /* Threshold interrupt type */ @@ -188,16 +191,61 @@ static int vcnl4000_init(struct vcnl4000_data *data) return data->chip_spec->set_power_state(data, true); }; +static ssize_t vcnl4000_write_als_enable(struct vcnl4000_data *data, bool en) +{ + int ret; + + mutex_lock(&data->vcnl4000_lock); + + ret = i2c_smbus_read_word_data(data->client, VCNL4200_AL_CONF); + if (ret < 0) + goto out; + + if (en) + ret &= ~VCNL4040_ALS_CONF_ALS_SHUTDOWN; + else + ret |= VCNL4040_ALS_CONF_ALS_SHUTDOWN; + + ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, ret); + +out: + mutex_unlock(&data->vcnl4000_lock); + + return ret; +} + +static ssize_t vcnl4000_write_ps_enable(struct vcnl4000_data *data, bool en) +{ + int ret; + + mutex_lock(&data->vcnl4000_lock); + + ret = i2c_smbus_read_word_data(data->client, VCNL4200_PS_CONF1); + if (ret < 0) + goto out; + + if (en) + ret &= ~VCNL4040_PS_CONF1_PS_SHUTDOWN; + else + ret |= VCNL4040_PS_CONF1_PS_SHUTDOWN; + + ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, ret); + +out: + mutex_unlock(&data->vcnl4000_lock); + + return ret; +} + static int vcnl4200_set_power_state(struct vcnl4000_data *data, bool on) { - u16 val = on ? 0 /* power on */ : 1 /* shut down */; int ret; - ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, val); + ret = vcnl4000_write_als_enable(data, on); if (ret < 0) return ret; - ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, val); + ret = vcnl4000_write_ps_enable(data, on); if (ret < 0) return ret; |