From 014714b8a62107d22bd2a089801bbfb4bb6412ae Mon Sep 17 00:00:00 2001 From: Kirill Yatsenko Date: Thu, 11 May 2023 22:26:32 +0200 Subject: hwmon: (aht10) Refactor aht10_read_values function Exit from the function immediately if the poll time hasn't yet expired. Therefore the code after the check can be moved one tab to the left which improves readability. Signed-off-by: Kirill Yatsenko Link: https://lore.kernel.org/r/20230511202633.299174-2-kiriyatsenko@gmail.com [groeck: Dropped else after return] Signed-off-by: Guenter Roeck --- drivers/hwmon/aht10.c | 68 ++++++++++++++++++++++++++------------------------- 1 file changed, 35 insertions(+), 33 deletions(-) (limited to 'drivers/hwmon') diff --git a/drivers/hwmon/aht10.c b/drivers/hwmon/aht10.c index 4ccf49c7cc8c..ec7459575c58 100644 --- a/drivers/hwmon/aht10.c +++ b/drivers/hwmon/aht10.c @@ -135,40 +135,42 @@ static int aht10_read_values(struct aht10_data *data) struct i2c_client *client = data->client; mutex_lock(&data->lock); - if (aht10_polltime_expired(data)) { - res = i2c_master_send(client, cmd_meas, sizeof(cmd_meas)); - if (res < 0) { - mutex_unlock(&data->lock); - return res; - } - - usleep_range(AHT10_MEAS_DELAY, - AHT10_MEAS_DELAY + AHT10_DELAY_EXTRA); - - res = i2c_master_recv(client, raw_data, AHT10_MEAS_SIZE); - if (res != AHT10_MEAS_SIZE) { - mutex_unlock(&data->lock); - if (res >= 0) - return -ENODATA; - else - return res; - } - - hum = ((u32)raw_data[1] << 12u) | - ((u32)raw_data[2] << 4u) | - ((raw_data[3] & 0xF0u) >> 4u); - - temp = ((u32)(raw_data[3] & 0x0Fu) << 16u) | - ((u32)raw_data[4] << 8u) | - raw_data[5]; - - temp = ((temp * 625) >> 15u) * 10; - hum = ((hum * 625) >> 16u) * 10; - - data->temperature = (int)temp - 50000; - data->humidity = hum; - data->previous_poll_time = ktime_get_boottime(); + if (!aht10_polltime_expired(data)) { + mutex_unlock(&data->lock); + return 0; + } + + res = i2c_master_send(client, cmd_meas, sizeof(cmd_meas)); + if (res < 0) { + mutex_unlock(&data->lock); + return res; } + + usleep_range(AHT10_MEAS_DELAY, AHT10_MEAS_DELAY + AHT10_DELAY_EXTRA); + + res = i2c_master_recv(client, raw_data, AHT10_MEAS_SIZE); + if (res != AHT10_MEAS_SIZE) { + mutex_unlock(&data->lock); + if (res >= 0) + return -ENODATA; + return res; + } + + hum = ((u32)raw_data[1] << 12u) | + ((u32)raw_data[2] << 4u) | + ((raw_data[3] & 0xF0u) >> 4u); + + temp = ((u32)(raw_data[3] & 0x0Fu) << 16u) | + ((u32)raw_data[4] << 8u) | + raw_data[5]; + + temp = ((temp * 625) >> 15u) * 10; + hum = ((hum * 625) >> 16u) * 10; + + data->temperature = (int)temp - 50000; + data->humidity = hum; + data->previous_poll_time = ktime_get_boottime(); + mutex_unlock(&data->lock); return 0; } -- cgit v1.2.3