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 08/11] pwm: sun4i: Use nsecs_to_jiffies to avoid a division Date: Tue, 12 May 2020 17:39:42 -0700 [thread overview] Message-ID: <93595b4e546184b80cd7959e78e8e3f2c5ef61a3.1589330178.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 nsecs_to_jiffies() which does away with the need for a division operation. Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org> Acked-by: Chen-Yu Tsai <wens@csie.org> --- drivers/pwm/pwm-sun4i.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 5c677c5..1694e69 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -285,7 +285,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, val = (duty & PWM_DTY_MASK) | PWM_PRD(period); sun4i_pwm_writel(sun4i_pwm, val, PWM_CH_PRD(pwm->hwpwm)); sun4i_pwm->next_period[pwm->hwpwm] = jiffies + - usecs_to_jiffies(cstate.period / 1000 + 1); + nsecs_to_jiffies(cstate.period + 1000); if (state->polarity != PWM_POLARITY_NORMAL) ctrl &= ~BIT_CH(PWM_ACT_STATE, pwm->hwpwm); -- 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 08/11] pwm: sun4i: Use nsecs_to_jiffies to avoid a division Date: Wed, 20 May 2020 15:56:01 -0700 [thread overview] Message-ID: <93595b4e546184b80cd7959e78e8e3f2c5ef61a3.1589330178.git.gurus@codeaurora.org> (raw) Message-ID: <20200520225601.n2GZIr_4p9mcM8XDTD-L7EWuTQKnj27hseIMhrSziJU@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 nsecs_to_jiffies() which does away with the need for a division operation. Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org> Acked-by: Chen-Yu Tsai <wens@csie.org> --- drivers/pwm/pwm-sun4i.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 5c677c5..1694e69 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -285,7 +285,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, val = (duty & PWM_DTY_MASK) | PWM_PRD(period); sun4i_pwm_writel(sun4i_pwm, val, PWM_CH_PRD(pwm->hwpwm)); sun4i_pwm->next_period[pwm->hwpwm] = jiffies + - usecs_to_jiffies(cstate.period / 1000 + 1); + nsecs_to_jiffies(cstate.period + 1000); if (state->polarity != PWM_POLARITY_NORMAL) ctrl &= ~BIT_CH(PWM_ACT_STATE, pwm->hwpwm); -- 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 ` Guru Das Srinagesh [this message] 2020-05-20 22:56 ` [RESEND PATCH v14 08/11] pwm: sun4i: Use nsecs_to_jiffies to avoid a division Guru Das Srinagesh 2020-05-13 0:39 ` [RESEND PATCH v14 09/11] backlight: pwm_bl: Use 64-bit division function Guru Das Srinagesh 2020-05-20 22:56 ` 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
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