# \[PATCH v13 09/11\] backlight: pwm\_bl: Use 64-bit division function - From: Guru Das Srinagesh \ - Date: 2020-04-22 02:57:43 - List: linux-fbdev - Page: https://ratatoskr.run/linux-fbdev/2020/04/5937095 - Thread: https://ratatoskr.run/linux-pwm/2020/04/9182340/t.md ```text Since the PWM framework is switching struct pwm_state.period's datatype to u64, prepare for this transition by using div_u64 to handle a 64-bit dividend instead of a straight division operation. Cc: Lee Jones Cc: Daniel Thompson Cc: Jingoo Han Cc: Bartlomiej Zolnierkiewicz Cc: Cc: Cc: Signed-off-by: Guru Das Srinagesh Reviewed-by: Daniel Thompson --- drivers/video/backlight/pwm_bl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 82b8d75..464baad 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -606,7 +606,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->scale = data->max_brightness; } - pb->lth_brightness = data->lth_brightness * (state.period / pb->scale); + pb->lth_brightness = data->lth_brightness * (div_u64(state.period, + pb->scale)); props.type = BACKLIGHT_RAW; props.max_brightness = data->max_brightness; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project ```