* [PATCH v13 09/11] backlight: pwm_bl: Use 64-bit division function [not found] <cover.1587523702.git.gurus@codeaurora.org> @ 2020-04-22 2:57 ` Guru Das Srinagesh 2020-05-26 7:00 ` Lee Jones 0 siblings, 1 reply; 2+ messages in thread From: Guru Das Srinagesh @ 2020-04-22 2:57 UTC (permalink / raw) To: linux-pwm Cc: Guru Das Srinagesh, Daniel Thompson, David Collins, Bartlomiej Zolnierkiewicz, Jingoo Han, linux-kernel, dri-devel, Thierry Reding, linux-fbdev, Uwe Kleine-König, Subbaraman Narayanamurthy, Lee Jones 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 <lee.jones@linaro.org> Cc: Daniel Thompson <daniel.thompson@linaro.org> Cc: Jingoo Han <jingoohan1@gmail.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: linux-pwm@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linux-fbdev@vger.kernel.org Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> --- 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 ^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v13 09/11] backlight: pwm_bl: Use 64-bit division function 2020-04-22 2:57 ` [PATCH v13 09/11] backlight: pwm_bl: Use 64-bit division function Guru Das Srinagesh @ 2020-05-26 7:00 ` Lee Jones 0 siblings, 0 replies; 2+ messages in thread From: Lee Jones @ 2020-05-26 7:00 UTC (permalink / raw) To: Guru Das Srinagesh Cc: linux-pwm, Daniel Thompson, David Collins, Bartlomiej Zolnierkiewicz, Jingoo Han, linux-kernel, dri-devel, Thierry Reding, linux-fbdev, Uwe Kleine-König, Subbaraman Narayanamurthy On Tue, 21 Apr 2020, Guru Das Srinagesh wrote: > 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 <lee.jones@linaro.org> > Cc: Daniel Thompson <daniel.thompson@linaro.org> > Cc: Jingoo Han <jingoohan1@gmail.com> > Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> > Cc: linux-pwm@vger.kernel.org > Cc: dri-devel@lists.freedesktop.org > Cc: linux-fbdev@vger.kernel.org > > 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> -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog ^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-04-22 2:57 ` [PATCH v13 09/11] backlight: pwm_bl: Use 64-bit division function Guru Das Srinagesh
2020-05-26 7:00 ` Lee Jones
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