diff options
Diffstat (limited to 'drivers/iio/adc/pac1934.c')
| -rw-r--r-- | drivers/iio/adc/pac1934.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/iio/adc/pac1934.c b/drivers/iio/adc/pac1934.c index 09fe88eb3fb0..48df16509260 100644 --- a/drivers/iio/adc/pac1934.c +++ b/drivers/iio/adc/pac1934.c @@ -88,6 +88,7 @@ #define PAC1934_VPOWER_3_ADDR 0x19 #define PAC1934_VPOWER_4_ADDR 0x1A #define PAC1934_REFRESH_V_REG_ADDR 0x1F +#define PAC1934_SLOW_REG_ADDR 0x20 #define PAC1934_CTRL_STAT_REGS_ADDR 0x1C #define PAC1934_PID_REG_ADDR 0xFD #define PAC1934_MID_REG_ADDR 0xFE @@ -1265,8 +1266,23 @@ static int pac1934_chip_configure(struct pac1934_chip_info *info) /* no SLOW triggered REFRESH, clear POR */ regs[PAC1934_SLOW_REG_OFF] = 0; - ret = i2c_smbus_write_block_data(client, PAC1934_CTRL_STAT_REGS_ADDR, - ARRAY_SIZE(regs), (u8 *)regs); + /* + * Write the three bytes sequentially, as the device does not support + * block write. + */ + ret = i2c_smbus_write_byte_data(client, PAC1934_CTRL_STAT_REGS_ADDR, + regs[PAC1934_CHANNEL_DIS_REG_OFF]); + if (ret) + return ret; + + ret = i2c_smbus_write_byte_data(client, + PAC1934_CTRL_STAT_REGS_ADDR + PAC1934_NEG_PWR_REG_OFF, + regs[PAC1934_NEG_PWR_REG_OFF]); + if (ret) + return ret; + + ret = i2c_smbus_write_byte_data(client, PAC1934_SLOW_REG_ADDR, + regs[PAC1934_SLOW_REG_OFF]); if (ret) return ret; @@ -1455,13 +1471,6 @@ static int pac1934_prep_custom_attributes(struct pac1934_chip_info *info, return 0; } -static void pac1934_mutex_destroy(void *data) -{ - struct mutex *lock = data; - - mutex_destroy(lock); -} - static const struct iio_info pac1934_info = { .read_raw = pac1934_read_raw, .write_raw = pac1934_write_raw, @@ -1520,9 +1529,7 @@ static int pac1934_probe(struct i2c_client *client) return dev_err_probe(dev, ret, "parameter parsing returned an error\n"); - mutex_init(&info->lock); - ret = devm_add_action_or_reset(dev, pac1934_mutex_destroy, - &info->lock); + ret = devm_mutex_init(dev, &info->lock); if (ret < 0) return ret; |