From: George Stark <gnstark@xxxxxxxxxxxxxxxxx> It is highly recommended to leverage the DIV_ROUND_UP() function as a more refined and mathematically precise alternative to employing a coarse division method. Signed-off-by: George Stark <gnstark@xxxxxxxxxxxxxxxxx> Signed-off-by: Dmitry Rokosov <ddrokosov@xxxxxxxxxxxxxxxxx> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> --- drivers/leds/leds-aw200xx.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c index 4c83d4979cf5..c48aa11fd411 100644 --- a/drivers/leds/leds-aw200xx.c +++ b/drivers/leds/leds-aw200xx.c @@ -87,6 +87,8 @@ #define AW200XX_REG_DIM(x, columns) \ AW200XX_REG(AW200XX_PAGE4, AW200XX_LED2REG(x, columns) * 2) #define AW200XX_REG_DIM2FADE(x) ((x) + 1) +#define AW200XX_REG_FADE2DIM(fade) \ + DIV_ROUND_UP((fade) * AW200XX_DIM_MAX, AW200XX_FADE_MAX) /* * Duty ratio of display scan (see p.15 of datasheet for formula): @@ -195,9 +197,7 @@ static int aw200xx_brightness_set(struct led_classdev *cdev, dim = led->dim; if (dim < 0) - dim = max_t(int, - brightness / (AW200XX_FADE_MAX / AW200XX_DIM_MAX), - 1); + dim = AW200XX_REG_FADE2DIM(brightness); ret = regmap_write(chip->regmap, reg, dim); if (ret) @@ -460,6 +460,7 @@ static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) led->num = source; led->chip = chip; led->cdev.brightness_set_blocking = aw200xx_brightness_set; + led->cdev.max_brightness = AW200XX_FADE_MAX; led->cdev.groups = dim_groups; init_data.fwnode = child; -- 2.36.0
