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gpio: mvebu: make pwm .get_state closer to idempotent

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Round up the divisions in .get_state() to make applying the read out
configuration idempotent in most cases as .apply rounds down.

Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Baruch Siach 2021-01-20 18:16:26 +02:00 committed by Bartosz Golaszewski
parent aa37e27f61
commit de1eaf6016
1 changed files with 2 additions and 2 deletions
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4
drivers/gpio/gpio-mvebu.c
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@ -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)