From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Jones Date: Fri, 20 Mar 2020 13:31:23 +0000 Subject: Re: [PATCH v11 10/12] backlight: pwm_bl: Use 64-bit division function Message-Id: <20200320133123.GD5477@dell> List-Id: References: <17fc1dcf8b9b392d1e37dc7e3e67409e3c502840.1584667964.git.gurus@codeaurora.org> In-Reply-To: <17fc1dcf8b9b392d1e37dc7e3e67409e3c502840.1584667964.git.gurus@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: Guru Das Srinagesh Cc: linux-pwm@vger.kernel.org, Daniel Thompson , Bartlomiej Zolnierkiewicz , Jingoo Han , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Thierry Reding , linux-fbdev@vger.kernel.org, Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Subbaraman Narayanamurthy On Thu, 19 Mar 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 > Cc: Daniel Thompson > Cc: Jingoo Han > Cc: Bartlomiej Zolnierkiewicz > Cc: linux-pwm@vger.kernel.org > Cc: dri-devel@lists.freedesktop.org > Cc: linux-fbdev@vger.kernel.org > > Signed-off-by: Guru Das Srinagesh > Reviewed-by: Daniel Thompson > --- > drivers/video/backlight/pwm_bl.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Can this patch be taken on its own? > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > index efb4efc..3e5dbcf 100644 > --- a/drivers/video/backlight/pwm_bl.c > +++ b/drivers/video/backlight/pwm_bl.c > @@ -625,7 +625,8 @@ 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; -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog