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pwm: solve the bug sleeping function called from invalid context at kernel/mutex.c:413

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This commit is contained in:
许盛飞 2014-02-11 11:19:03 +08:00
parent 2ffcdebe6d
commit 9defda9cd2
1 changed files with 7 additions and 14 deletions
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21
drivers/pwm/pwm-rockchip.c
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@ -227,9 +227,8 @@ static inline void rk_pwm_writel(struct rk_pwm_chip *chip,
}
#if 1
static int __rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
static int rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns)
{
struct rk_pwm_chip *pc = to_rk_pwm_chip(chip);
@ -238,6 +237,10 @@ static int __rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int ret;
u32 off, on;
int conf=0;
unsigned long flags;
spinlock_t *lock;
lock = &pwm_lock[pwm->hwpwm];
off = PWM_RESET;
on = PWM_ENABLE | PWM_TIMER_EN;
@ -293,6 +296,7 @@ static int __rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
if (ret)
return ret;
#endif
spin_lock_irqsave(lock, flags);
barrier();
rk_pwm_writel(pc, pwm->hwpwm, PWM_REG_CTRL,off);
@ -304,6 +308,7 @@ static int __rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
dsb();
rk_pwm_writel(pc, pwm->hwpwm, PWM_REG_CTRL,on|conf);
dsb();
spin_unlock_irqrestore(lock, flags);
#if PWM_CLK
clk_disable(pc->clk);
@ -312,18 +317,6 @@ static int __rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
return 0;
}
#endif
static int rk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns)
{
unsigned long flags;
spinlock_t *lock;
lock = &pwm_lock[pwm->hwpwm];
spin_lock_irqsave(lock, flags);
__rk_pwm_config(chip, pwm, duty_ns, period_ns);
spin_unlock_irqrestore(lock, flags);
return 0;
}
static int rk_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{