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From: Guru Das Srinagesh <gurus@codeaurora.org>
To: linux-pwm@vger.kernel.org
Cc: "Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <uwe@kleine-koenig.org>,
	"Subbaraman Narayanamurthy" <subbaram@codeaurora.org>,
	linux-kernel@vger.kernel.org,
	"Guru Das Srinagesh" <gurus@codeaurora.org>,
	"Lee Jones" <lee.jones@linaro.org>,
	"Daniel Thompson" <daniel.thompson@linaro.org>,
	"Jingoo Han" <jingoohan1@gmail.com>,
	"Bartlomiej Zolnierkiewicz" <b.zolnierkie@samsung.com>,
	dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org
Subject: [PATCH v8 11/12] backlight: pwm_bl: Use 64-bit division function
Date: Tue, 10 Mar 2020 18:41:20 -0700	[thread overview]
Message-ID: <a9f914f92ee637c68e1d336e5b4894a565eb3cdc.1583889178.git.gurus@codeaurora.org> (raw)
In-Reply-To: <cover.1583889178.git.gurus@codeaurora.org>
In-Reply-To: <cover.1583889178.git.gurus@codeaurora.org>

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>
---
 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 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;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2020-03-11  1:41 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <cover.1583889178.git.gurus@codeaurora.org>
2020-03-11  1:41 ` [PATCH v8 01/12] clk: pwm: Use 64-bit division function Guru Das Srinagesh
2020-03-11 16:58   ` David Laight
2020-03-12  2:09     ` Guru Das Srinagesh
2020-03-12  9:14       ` David Laight
2020-03-12 19:09         ` Guru Das Srinagesh
2020-03-19 20:53           ` Guru Das Srinagesh
2020-04-09  2:40         ` Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 02/12] drm/i915: Use 64-bit division macro Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 03/12] hwmon: pwm-fan: " Guru Das Srinagesh
2020-03-11 15:08   ` Guenter Roeck
2020-03-11  1:41 ` [PATCH v8 04/12] ir-rx51: " Guru Das Srinagesh
2020-03-11  2:11   ` Sean Young
2020-03-11  1:41 ` [PATCH v8 05/12] pwm: clps711x: " Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 06/12] pwm: pwm-imx-tpm: " Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 07/12] pwm: imx27: Use 64-bit division macro and function Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 08/12] pwm: sifive: Use 64-bit division macro Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 09/12] pwm: stm32-lp: Use %llu format specifier for period Guru Das Srinagesh
2020-03-11  1:41 ` [PATCH v8 10/12] pwm: sun4i: Use 64-bit division function Guru Das Srinagesh
2020-03-11  3:35   ` Chen-Yu Tsai
2020-03-11  1:41 ` Guru Das Srinagesh [this message]
2020-03-11 10:05   ` [PATCH v8 11/12] backlight: pwm_bl: " Daniel Thompson
2020-03-11  1:41 ` [PATCH v8 12/12] pwm: core: Convert period and duty cycle to u64 Guru Das Srinagesh

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