[PATCH 3/5] gpio: mvebu: make pwm apply/get_state closer to idempotent

[Baruch Siach]

Round up the result of division in period/duty_cycle calculation to make
the result closer to idempotent.

Reported-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 drivers/gpio/gpio-mvebu.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index c424d88e9e2b..6fc64846eda3 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -668,7 +668,7 @@ static void mvebu_pwm_get_state(struct pwm_chip *chip,
 
 	regmap_read(mvpwm->regs, mvebu_pwmreg_blink_on_duration(mvpwm), &u);
 	val = (unsigned long long) u * NSEC_PER_SEC;
-	do_div(val, mvpwm->clk_rate);
+	val = DIV_ROUND_UP_ULL(val, mvpwm->clk_rate);
 	if (val > UINT_MAX)
 		state->duty_cycle = UINT_MAX;
 	else if (val)
@@ -680,7 +680,7 @@ 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; /* period = on + off duration */
 	val *= NSEC_PER_SEC;
-	do_div(val, mvpwm->clk_rate);
+	val = DIV_ROUND_UP_ULL(val, mvpwm->clk_rate);
 	if (val > UINT_MAX)
 		state->period = UINT_MAX;
 	else if (val)
@@ -707,7 +707,7 @@ static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	unsigned int on, off;
 
 	val = (unsigned long long) mvpwm->clk_rate * state->duty_cycle;
-	do_div(val, NSEC_PER_SEC);
+	val = DIV_ROUND_UP_ULL(val, NSEC_PER_SEC);
 	if (val > UINT_MAX)
 		return -EINVAL;
 	if (val)
@@ -716,7 +716,7 @@ static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 		on = 1;
 
 	val = (unsigned long long) mvpwm->clk_rate * state->period;
-	do_div(val, NSEC_PER_SEC);
+	val = DIV_ROUND_UP_ULL(val, NSEC_PER_SEC);
 	val -= on;
 	if (val > UINT_MAX)
 		return -EINVAL;
-- 
2.29.2