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backlight: pwm_bl: Use 64-bit division function

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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.

Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Guru Das Srinagesh 2020-06-02 15:31:14 -07:00 committed by Thierry Reding
parent c7dcccaec2
commit 134ada17db
1 changed files with 2 additions and 1 deletions
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3
drivers/video/backlight/pwm_bl.c
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@ -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;