Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
pwm-sun4i: Convert "next_period" to local variable
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>
authored by
Max Kellermann
and committed by
Thierry Reding
c7078972
b2d229d4
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-5
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-5
drivers/pwm/pwm-sun4i.c
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-5
drivers/pwm/pwm-sun4i.c
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void __iomem *base;
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spinlock_t ctrl_lock;
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const struct sun4i_pwm_data *data;
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-
unsigned long next_period[2];
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};
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static inline struct sun4i_pwm_chip *to_sun4i_pwm_chip(struct pwm_chip *chip)
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int ret;
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unsigned int delay_us, prescaler = 0;
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unsigned long now;
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unsigned long next_period;
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bool bypass;
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pwm_get_state(pwm, &cstate);
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val = (duty & PWM_DTY_MASK) | PWM_PRD(period);
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sun4i_pwm_writel(sun4i_pwm, val, PWM_CH_PRD(pwm->hwpwm));
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sun4i_pwm->next_period[pwm->hwpwm] = jiffies +
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next_period = jiffies +
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nsecs_to_jiffies(cstate.period + 1000);
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if (state->polarity != PWM_POLARITY_NORMAL)
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/* We need a full period to elapse before disabling the channel. */
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now = jiffies;
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if (time_before(now, sun4i_pwm->next_period[pwm->hwpwm])) {
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delay_us = jiffies_to_usecs(sun4i_pwm->next_period[pwm->hwpwm] -
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now);
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if (time_before(now, next_period)) {
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delay_us = jiffies_to_usecs(next_period - now);
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if ((delay_us / 500) > MAX_UDELAY_MS)
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msleep(delay_us / 1000 + 1);
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else