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From: Baruch Siach <baruch@tkos.co.il>
To: "Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Lee Jones" <lee.jones@linaro.org>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
	"Rob Herring" <robh+dt@kernel.org>
Cc: Baruch Siach <baruch@tkos.co.il>,
	Russell King <linux@armlinux.org.uk>,
	Andrew Lunn <andrew@lunn.ch>,
	Gregory Clement <gregory.clement@bootlin.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Chris Packham <chris.packham@alliedtelesis.co.nz>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Ralph Sennhauser <ralph.sennhauser@gmail.com>,
	linux-pwm@vger.kernel.org, linux-gpio@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH v5 1/4] gpio: mvebu: fix pwm get_state period calculation
Date: Tue,  5 Jan 2021 14:42:28 +0200	[thread overview]
Message-ID: <0cd077886d37699bdf0a20295fd8ee422e5285b5.1609849176.git.baruch@tkos.co.il> (raw)
In-Reply-To: <cover.1609849176.git.baruch@tkos.co.il>

The period is the sum of on and off values.

Reported-by: Russell King <linux@armlinux.org.uk>
Fixes: 757642f9a584e ("gpio: mvebu: Add limited PWM support")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
 drivers/gpio/gpio-mvebu.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 672681a976f5..ac7cb6d3702e 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -679,17 +679,13 @@ static void mvebu_pwm_get_state(struct pwm_chip *chip,
 	regmap_read(mvpwm->regs, mvebu_pwmreg_blink_off_duration(mvpwm), &u);
 	val = (unsigned long long) u * NSEC_PER_SEC;
 	do_div(val, mvpwm->clk_rate);
-	if (val < state->duty_cycle) {
+	val += state->duty_cycle;
+	if (val > UINT_MAX)
+		state->period = UINT_MAX;
+	else if (val)
+		state->period = val;
+	else
 		state->period = 1;
-	} else {
-		val -= state->duty_cycle;
-		if (val > UINT_MAX)
-			state->period = UINT_MAX;
-		else if (val)
-			state->period = val;
-		else
-			state->period = 1;
-	}
 
 	regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset, &u);
 	if (u)
-- 
2.29.2


WARNING: multiple messages have this Message-ID (diff)
From: Baruch Siach <baruch@tkos.co.il>
To: "Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Lee Jones" <lee.jones@linaro.org>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
	"Rob Herring" <robh+dt@kernel.org>
Cc: Andrew Lunn <andrew@lunn.ch>, Baruch Siach <baruch@tkos.co.il>,
	linux-pwm@vger.kernel.org,
	Gregory Clement <gregory.clement@bootlin.com>,
	Russell King <linux@armlinux.org.uk>,
	linux-gpio@vger.kernel.org, devicetree@vger.kernel.org,
	Chris Packham <chris.packham@alliedtelesis.co.nz>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Ralph Sennhauser <ralph.sennhauser@gmail.com>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	linux-arm-kernel@lists.infradead.org,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Subject: [PATCH v5 1/4] gpio: mvebu: fix pwm get_state period calculation
Date: Tue,  5 Jan 2021 14:42:28 +0200	[thread overview]
Message-ID: <0cd077886d37699bdf0a20295fd8ee422e5285b5.1609849176.git.baruch@tkos.co.il> (raw)
In-Reply-To: <cover.1609849176.git.baruch@tkos.co.il>

The period is the sum of on and off values.

Reported-by: Russell King <linux@armlinux.org.uk>
Fixes: 757642f9a584e ("gpio: mvebu: Add limited PWM support")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
 drivers/gpio/gpio-mvebu.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 672681a976f5..ac7cb6d3702e 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -679,17 +679,13 @@ static void mvebu_pwm_get_state(struct pwm_chip *chip,
 	regmap_read(mvpwm->regs, mvebu_pwmreg_blink_off_duration(mvpwm), &u);
 	val = (unsigned long long) u * NSEC_PER_SEC;
 	do_div(val, mvpwm->clk_rate);
-	if (val < state->duty_cycle) {
+	val += state->duty_cycle;
+	if (val > UINT_MAX)
+		state->period = UINT_MAX;
+	else if (val)
+		state->period = val;
+	else
 		state->period = 1;
-	} else {
-		val -= state->duty_cycle;
-		if (val > UINT_MAX)
-			state->period = UINT_MAX;
-		else if (val)
-			state->period = val;
-		else
-			state->period = 1;
-	}
 
 	regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset, &u);
 	if (u)
-- 
2.29.2


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  reply	other threads:[~2021-01-05 12:43 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-05 12:42 [PATCH v5 0/4] gpio: mvebu: Armada 8K/7K PWM support Baruch Siach
2021-01-05 12:42 ` Baruch Siach
2021-01-05 12:42 ` Baruch Siach [this message]
2021-01-05 12:42   ` [PATCH v5 1/4] gpio: mvebu: fix pwm get_state period calculation Baruch Siach
2021-01-05 12:49   ` Russell King - ARM Linux admin
2021-01-05 12:49     ` Russell King - ARM Linux admin
2021-01-05 12:42 ` [PATCH v5 2/4] gpio: mvebu: add pwm support for Armada 8K/7K Baruch Siach
2021-01-05 12:42   ` Baruch Siach
2021-01-05 12:42 ` [PATCH v5 3/4] arm64: dts: armada: add pwm offsets for ap/cp gpios Baruch Siach
2021-01-05 12:42   ` Baruch Siach
2021-01-05 12:42 ` [PATCH v5 4/4] dt-bindings: ap806: document gpio marvell,pwm-offset property Baruch Siach
2021-01-05 12:42   ` [PATCH v5 4/4] dt-bindings: ap806: document gpio marvell, pwm-offset property Baruch Siach

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