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pwm-sun4i: Convert "next_period" to local variable

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Its value is calculated in sun4i_pwm_apply() and is used only there.

Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Max Kellermann 2022-01-25 13:34:27 +01:00 committed by Thierry Reding
parent b2d229d4dd
commit c707897203
1 changed files with 4 additions and 5 deletions
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9
drivers/pwm/pwm-sun4i.c
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@ -89,7 +89,6 @@ struct sun4i_pwm_chip {
void __iomem *base;
spinlock_t ctrl_lock;
const struct sun4i_pwm_data *data;
unsigned long next_period[2];
};
static inline struct sun4i_pwm_chip *to_sun4i_pwm_chip(struct pwm_chip *chip)
@ -237,6 +236,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
int ret;
unsigned int delay_us, prescaler = 0;
unsigned long now;
unsigned long next_period;
bool bypass;
pwm_get_state(pwm, &cstate);
@ -284,7 +284,7 @@ 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 +
next_period = jiffies +
nsecs_to_jiffies(cstate.period + 1000);
if (state->polarity != PWM_POLARITY_NORMAL)
@ -306,9 +306,8 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
/* We need a full period to elapse before disabling the channel. */
now = jiffies;
if (time_before(now, sun4i_pwm->next_period[pwm->hwpwm])) {
delay_us = jiffies_to_usecs(sun4i_pwm->next_period[pwm->hwpwm] -
now);
if (time_before(now, next_period)) {
delay_us = jiffies_to_usecs(next_period - now);
if ((delay_us / 500) > MAX_UDELAY_MS)
msleep(delay_us / 1000 + 1);
else