diff options
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/samsung_pwm_timer.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index 1752457a4f7..d9048b84354 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -49,6 +49,9 @@ #define TCON_INVERT(chan) (1 << (4 * (chan) + 2)) #define TCON_AUTORELOAD(chan) (1 << (4 * (chan) + 3)) +DEFINE_SPINLOCK(samsung_pwm_lock); +EXPORT_SYMBOL(samsung_pwm_lock); + struct samsung_timer_source { unsigned int event_id; unsigned int source_id; @@ -72,14 +75,14 @@ static void samsung_timer_set_prescale(struct samsung_pwm *pwm, if (channel >= 2) shift = TCFG0_PRESCALER1_SHIFT; - spin_lock_irqsave(&pwm->slock, flags); + spin_lock_irqsave(&samsung_pwm_lock, flags); reg = readl(pwm->base + REG_TCFG0); reg &= ~(TCFG0_PRESCALER_MASK << shift); reg |= (prescale - 1) << shift; writel(reg, pwm->base + REG_TCFG0); - spin_unlock_irqrestore(&pwm->slock, flags); + spin_unlock_irqrestore(&samsung_pwm_lock, flags); } static void samsung_timer_set_divisor(struct samsung_pwm *pwm, @@ -92,14 +95,14 @@ static void samsung_timer_set_divisor(struct samsung_pwm *pwm, bits = (fls(divisor) - 1) - pwm->variant.div_base; - spin_lock_irqsave(&pwm->slock, flags); + spin_lock_irqsave(&samsung_pwm_lock, flags); reg = readl(pwm->base + REG_TCFG1); reg &= ~(TCFG1_MUX_MASK << shift); reg |= bits << shift; writel(reg, pwm->base + REG_TCFG1); - spin_unlock_irqrestore(&pwm->slock, flags); + spin_unlock_irqrestore(&samsung_pwm_lock, flags); } static void samsung_time_stop(unsigned int channel) @@ -110,13 +113,13 @@ static void samsung_time_stop(unsigned int channel) if (channel > 0) ++channel; - spin_lock_irqsave(&pwm->slock, flags); + spin_lock_irqsave(&samsung_pwm_lock, flags); tcon = __raw_readl(pwm->base + REG_TCON); tcon &= ~TCON_START(channel); __raw_writel(tcon, pwm->base + REG_TCON); - spin_unlock_irqrestore(&pwm->slock, flags); + spin_unlock_irqrestore(&samsung_pwm_lock, flags); } static void samsung_time_setup(unsigned int channel, unsigned long tcnt) @@ -128,7 +131,7 @@ static void samsung_time_setup(unsigned int channel, unsigned long tcnt) if (tcon_chan > 0) ++tcon_chan; - spin_lock_irqsave(&pwm->slock, flags); + spin_lock_irqsave(&samsung_pwm_lock, flags); tcon = __raw_readl(pwm->base + REG_TCON); @@ -141,7 +144,7 @@ static void samsung_time_setup(unsigned int channel, unsigned long tcnt) __raw_writel(tcnt, pwm->base + REG_TCMPB(channel)); __raw_writel(tcon, pwm->base + REG_TCON); - spin_unlock_irqrestore(&pwm->slock, flags); + spin_unlock_irqrestore(&samsung_pwm_lock, flags); } static void samsung_time_start(unsigned int channel, bool periodic) @@ -152,7 +155,7 @@ static void samsung_time_start(unsigned int channel, bool periodic) if (channel > 0) ++channel; - spin_lock_irqsave(&pwm->slock, flags); + spin_lock_irqsave(&samsung_pwm_lock, flags); tcon = __raw_readl(pwm->base + REG_TCON); @@ -166,7 +169,7 @@ static void samsung_time_start(unsigned int channel, bool periodic) __raw_writel(tcon, pwm->base + REG_TCON); - spin_unlock_irqrestore(&pwm->slock, flags); + spin_unlock_irqrestore(&samsung_pwm_lock, flags); } static int samsung_set_next_event(unsigned long cycles, @@ -394,7 +397,6 @@ static void __init samsung_pwm_alloc(struct device_node *np, return; } memcpy(&pwm->variant, variant, sizeof(pwm->variant)); - spin_lock_init(&pwm->slock); for (i = 0; i < SAMSUNG_PWM_NUM; ++i) pwm->irq[i] = irq_of_parse_and_map(np, i); |