On 09/02/17 01:54, Brian Masney wrote:
> When proximity is enabled in isl29028_enable_proximity(), the function
> msleep() is called with the sampling frequency, which is not correct.
> This patch changes the code to sleep the specified amount of time listed
> in the datasheet instead.
>
> Signed-off-by: Brian Masney <masn...@onstation.org>
Seems sensible. Applied to the togreg branch of iio.git and pushed out as
testing for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> drivers/staging/iio/light/isl29028.c | 31 +++++++++++++++++++++----------
> 1 file changed, 21 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/staging/iio/light/isl29028.c
> b/drivers/staging/iio/light/isl29028.c
> index 8dc24c94..177dced 100644
> --- a/drivers/staging/iio/light/isl29028.c
> +++ b/drivers/staging/iio/light/isl29028.c
> @@ -63,6 +63,9 @@
>
> #define ISL29028_POWER_OFF_DELAY_MS 2000
>
> +static const unsigned int isl29028_prox_sleep_time[] = {800, 400, 200, 100,
> 75,
> + 50, 12, 0};
> +
> enum isl29028_als_ir_mode {
> ISL29028_MODE_NONE = 0,
> ISL29028_MODE_ALS,
> @@ -78,22 +81,29 @@ struct isl29028_chip {
> enum isl29028_als_ir_mode als_ir_mode;
> };
>
> -static int isl29028_set_proxim_sampling(struct isl29028_chip *chip,
> - unsigned int sampling)
> +static int isl29028_find_prox_sleep_time_index(int sampling)
> {
> - struct device *dev = regmap_get_device(chip->regmap);
> - static unsigned int prox_period[] = {800, 400, 200, 100, 75, 50, 12, 0};
> unsigned int period = DIV_ROUND_UP(1000, sampling);
> - int sel, ret;
> + int i;
>
> - for (sel = 0; sel < ARRAY_SIZE(prox_period); ++sel) {
> - if (period >= prox_period[sel])
> + for (i = 0; i < ARRAY_SIZE(isl29028_prox_sleep_time); ++i) {
> + if (period >= isl29028_prox_sleep_time[i])
> break;
> }
>
> + return i;
> +}
> +
> +static int isl29028_set_proxim_sampling(struct isl29028_chip *chip,
> + unsigned int sampling)
> +{
> + struct device *dev = regmap_get_device(chip->regmap);
> + int sleep_index, ret;
> +
> + sleep_index = isl29028_find_prox_sleep_time_index(sampling);
> ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
> ISL29028_CONF_PROX_SLP_MASK,
> - sel << ISL29028_CONF_PROX_SLP_SH);
> + sleep_index << ISL29028_CONF_PROX_SLP_SH);
>
> if (ret < 0) {
> dev_err(dev, "%s(): Error %d setting the proximity sampling\n",
> @@ -108,7 +118,7 @@ static int isl29028_set_proxim_sampling(struct
> isl29028_chip *chip,
>
> static int isl29028_enable_proximity(struct isl29028_chip *chip)
> {
> - int ret;
> + int sleep_index, ret;
>
> ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling);
> if (ret < 0)
> @@ -121,7 +131,8 @@ static int isl29028_enable_proximity(struct isl29028_chip
> *chip)
> return ret;
>
> /* Wait for conversion to be complete for first sample */
> - msleep(DIV_ROUND_UP(1000, chip->prox_sampling));
> + sleep_index = isl29028_find_prox_sleep_time_index(chip->prox_sampling);
> + msleep(isl29028_prox_sleep_time[sleep_index]);
>
> return 0;
> }
>
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