iio:temperature:mlx90632: Convert polling while loop to regmap

Reduce number of lines and improve readability to convert polling while
loops to regmap_read_poll_timeout.

Signed-off-by: Crt Mori <cmo@melexis.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200818213737.140613-4-cmo@melexis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
index ce75f5a3486b3ef5687960e3c521c29ba47b9bd9..d782634c107f1e744ad187f7ff188e301f534d18 100644 (file)
--- a/drivers/iio/temperature/mlx90632.c
+++ b/drivers/iio/temperature/mlx90632.c
@@ -180,25 +180,19 @@ static s32 mlx90632_pwr_continuous(struct regmap *regmap)
  */
 static int mlx90632_perform_measurement(struct mlx90632_data *data)
 {
-       int ret, tries = 100;
        unsigned int reg_status;
+       int ret;
 
        ret = regmap_update_bits(data->regmap, MLX90632_REG_STATUS,
                                 MLX90632_STAT_DATA_RDY, 0);
        if (ret < 0)
                return ret;
 
-       while (tries-- > 0) {
-               ret = regmap_read(data->regmap, MLX90632_REG_STATUS,
-                                 &reg_status);
-               if (ret < 0)
-                       return ret;
-               if (reg_status & MLX90632_STAT_DATA_RDY)
-                       break;
-               usleep_range(10000, 11000);
-       }
+       ret = regmap_read_poll_timeout(data->regmap, MLX90632_REG_STATUS, reg_status,
+                                      !(reg_status & MLX90632_STAT_DATA_RDY), 10000,
+                                      100 * 10000);
 
-       if (tries < 0) {
+       if (ret < 0) {
                dev_err(&data->client->dev, "data not ready");
                return -ETIMEDOUT;
        }