From: Guru Das Srinagesh <gurus@codeaurora.org> To: linux-pwm@vger.kernel.org, "Thierry Reding" <thierry.reding@gmail.com>, "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> Cc: Subbaraman Narayanamurthy <subbaram@codeaurora.org>, David Collins <collinsd@codeaurora.org>, linux-kernel@vger.kernel.org, Joe Perches <joe@perches.com>, Stephen Boyd <sboyd@kernel.org>, Lee Jones <lee.jones@linaro.org>, Arnd Bergmann <arnd@arndb.de>, Geert Uytterhoeven <geert@linux-m68k.org>, Guenter Roeck <linux@roeck-us.net>, Daniel Thompson <daniel.thompson@linaro.org>, Dan Carpenter <dan.carpenter@oracle.com>, linux-arm-kernel@lists.infradead.org, Guru Das Srinagesh <gurus@codeaurora.org> Subject: [RESEND PATCH v14 09/11] backlight: pwm_bl: Use 64-bit division function Date: Tue, 12 May 2020 17:39:43 -0700 [thread overview] Message-ID: <24d6ba7dec636cdc67f089891ab8f830ba83d3ae.1589330178.git.gurus@codeaurora.org> (raw) In-Reply-To: <cover.1589330178.git.gurus@codeaurora.org> In-Reply-To: <cover.1589330178.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. 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> --- 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
WARNING: multiple messages have this Message-ID (diff)
From: Guru Das Srinagesh <gurus@codeaurora.org> To: linux-pwm@vger.kernel.org, "Thierry Reding" <thierry.reding@gmail.com>, "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> Cc: Subbaraman Narayanamurthy <subbaram@codeaurora.org>, David Collins <collinsd@codeaurora.org>, linux-kernel@vger.kernel.org, Joe Perches <joe@perches.com>, Stephen Boyd <sboyd@kernel.org>, Lee Jones <lee.jones@linaro.org>, Arnd Bergmann <arnd@arndb.de>, Geert Uytterhoeven <geert@linux-m68k.org>, Guenter Roeck <linux@roeck-us.net>, Daniel Thompson <daniel.thompson@linaro.org>, Dan Carpenter <dan.carpenter@oracle.com>, linux-arm-kernel@lists.infradead.org, Guru Das Srinagesh <gurus@codeaurora.org> Subject: [RESEND PATCH v14 09/11] backlight: pwm_bl: Use 64-bit division function Date: Wed, 20 May 2020 15:56:02 -0700 [thread overview] Message-ID: <24d6ba7dec636cdc67f089891ab8f830ba83d3ae.1589330178.git.gurus@codeaurora.org> (raw) Message-ID: <20200520225602.l3kmk0PvA_WUSa8CMkqad0DWNTkPY4nN8J5vn8_c7IM@z> (raw) In-Reply-To: <cover.1589330178.git.gurus@codeaurora.org> In-Reply-To: <cover.1589330178.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. 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> --- 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
next prev parent reply other threads:[~2020-05-13 0:40 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-13 0:39 [RESEND PATCH v14 00/11] Convert PWM period and duty cycle to u64 Guru Das Srinagesh 2020-05-04 18:50 ` Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 01/11] drm/i915: Use 64-bit division macro Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 02/11] hwmon: pwm-fan: " Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 03/11] ir-rx51: " Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 04/11] pwm: clps711x: Cast period to u32 before use as divisor Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 05/11] pwm: pwm-imx-tpm: Use 64-bit division macro Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 06/11] pwm: imx27: Use 64-bit division macro and function Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 07/11] pwm: sifive: Use 64-bit division macro Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 08/11] pwm: sun4i: Use nsecs_to_jiffies to avoid a division Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 09/11] backlight: pwm_bl: Use 64-bit division function Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 10/11] clk: pwm: " Guru Das Srinagesh 2020-05-04 18:50 ` [RESEND PATCH v14 11/11] pwm: core: Convert period and duty cycle to u64 Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 00/11] Convert PWM " Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 01/11] drm/i915: Use 64-bit division macro Guru Das Srinagesh 2020-05-20 22:55 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 02/11] hwmon: pwm-fan: " Guru Das Srinagesh 2020-05-20 22:55 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 03/11] ir-rx51: " Guru Das Srinagesh 2020-05-20 22:55 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 04/11] pwm: clps711x: Cast period to u32 before use as divisor Guru Das Srinagesh 2020-05-20 22:55 ` Guru Das Srinagesh 2020-05-21 10:19 ` Daniel Thompson 2020-05-21 20:25 ` Guru Das Srinagesh 2020-05-22 9:37 ` Daniel Thompson 2020-05-22 23:19 ` Guru Das Srinagesh 2020-05-23 17:08 ` Daniel Thompson 2020-05-13 0:39 ` [RESEND PATCH v14 05/11] pwm: pwm-imx-tpm: Use 64-bit division macro Guru Das Srinagesh 2020-05-20 22:55 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 06/11] pwm: imx27: Use 64-bit division macro and function Guru Das Srinagesh 2020-05-20 22:55 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 07/11] pwm: sifive: Use 64-bit division macro Guru Das Srinagesh 2020-05-20 22:56 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 08/11] pwm: sun4i: Use nsecs_to_jiffies to avoid a division Guru Das Srinagesh 2020-05-20 22:56 ` Guru Das Srinagesh 2020-05-13 0:39 ` Guru Das Srinagesh [this message] 2020-05-20 22:56 ` [RESEND PATCH v14 09/11] backlight: pwm_bl: Use 64-bit division function Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 10/11] clk: pwm: " Guru Das Srinagesh 2020-05-20 22:56 ` Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 11/11] pwm: core: Convert period and duty cycle to u64 Guru Das Srinagesh 2020-05-20 22:56 ` Guru Das Srinagesh 2020-05-20 22:55 ` [RESEND PATCH v14 00/11] Convert PWM " Guru Das Srinagesh
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=24d6ba7dec636cdc67f089891ab8f830ba83d3ae.1589330178.git.gurus@codeaurora.org \ --to=gurus@codeaurora.org \ --cc=arnd@arndb.de \ --cc=collinsd@codeaurora.org \ --cc=dan.carpenter@oracle.com \ --cc=daniel.thompson@linaro.org \ --cc=geert@linux-m68k.org \ --cc=joe@perches.com \ --cc=lee.jones@linaro.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-pwm@vger.kernel.org \ --cc=linux@roeck-us.net \ --cc=sboyd@kernel.org \ --cc=subbaram@codeaurora.org \ --cc=thierry.reding@gmail.com \ --cc=u.kleine-koenig@pengutronix.de \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).