diff options
Diffstat (limited to 'drivers/clocksource/samsung_pwm_timer.c')
| -rw-r--r-- | drivers/clocksource/samsung_pwm_timer.c | 70 |
1 files changed, 37 insertions, 33 deletions
diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index 9502bc4c3..54565bd00 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -130,9 +130,9 @@ static void samsung_time_stop(unsigned int channel) spin_lock_irqsave(&samsung_pwm_lock, flags); - tcon = __raw_readl(pwm.base + REG_TCON); + tcon = readl_relaxed(pwm.base + REG_TCON); tcon &= ~TCON_START(channel); - __raw_writel(tcon, pwm.base + REG_TCON); + writel_relaxed(tcon, pwm.base + REG_TCON); spin_unlock_irqrestore(&samsung_pwm_lock, flags); } @@ -148,14 +148,14 @@ static void samsung_time_setup(unsigned int channel, unsigned long tcnt) spin_lock_irqsave(&samsung_pwm_lock, flags); - tcon = __raw_readl(pwm.base + REG_TCON); + tcon = readl_relaxed(pwm.base + REG_TCON); tcon &= ~(TCON_START(tcon_chan) | TCON_AUTORELOAD(tcon_chan)); tcon |= TCON_MANUALUPDATE(tcon_chan); - __raw_writel(tcnt, pwm.base + REG_TCNTB(channel)); - __raw_writel(tcnt, pwm.base + REG_TCMPB(channel)); - __raw_writel(tcon, pwm.base + REG_TCON); + writel_relaxed(tcnt, pwm.base + REG_TCNTB(channel)); + writel_relaxed(tcnt, pwm.base + REG_TCMPB(channel)); + writel_relaxed(tcon, pwm.base + REG_TCON); spin_unlock_irqrestore(&samsung_pwm_lock, flags); } @@ -170,7 +170,7 @@ static void samsung_time_start(unsigned int channel, bool periodic) spin_lock_irqsave(&samsung_pwm_lock, flags); - tcon = __raw_readl(pwm.base + REG_TCON); + tcon = readl_relaxed(pwm.base + REG_TCON); tcon &= ~TCON_MANUALUPDATE(channel); tcon |= TCON_START(channel); @@ -180,7 +180,7 @@ static void samsung_time_start(unsigned int channel, bool periodic) else tcon &= ~TCON_AUTORELOAD(channel); - __raw_writel(tcon, pwm.base + REG_TCON); + writel_relaxed(tcon, pwm.base + REG_TCON); spin_unlock_irqrestore(&samsung_pwm_lock, flags); } @@ -333,11 +333,10 @@ static u64 notrace samsung_read_sched_clock(void) return samsung_clocksource_read(NULL); } -static void __init samsung_clocksource_init(void) +static int __init samsung_clocksource_init(void) { unsigned long pclk; unsigned long clock_rate; - int ret; pclk = clk_get_rate(pwm.timerclk); @@ -358,9 +357,7 @@ static void __init samsung_clocksource_init(void) pwm.variant.bits, clock_rate); samsung_clocksource.mask = CLOCKSOURCE_MASK(pwm.variant.bits); - ret = clocksource_register_hz(&samsung_clocksource, clock_rate); - if (ret) - panic("samsung_clocksource_timer: can't register clocksource\n"); + return clocksource_register_hz(&samsung_clocksource, clock_rate); } static void __init samsung_timer_resources(void) @@ -380,26 +377,31 @@ static void __init samsung_timer_resources(void) /* * PWM master driver */ -static void __init _samsung_pwm_clocksource_init(void) +static int __init _samsung_pwm_clocksource_init(void) { u8 mask; int channel; mask = ~pwm.variant.output_mask & ((1 << SAMSUNG_PWM_NUM) - 1); channel = fls(mask) - 1; - if (channel < 0) - panic("failed to find PWM channel for clocksource"); + if (channel < 0) { + pr_crit("failed to find PWM channel for clocksource"); + return -EINVAL; + } pwm.source_id = channel; mask &= ~(1 << channel); channel = fls(mask) - 1; - if (channel < 0) - panic("failed to find PWM channel for clock event"); + if (channel < 0) { + pr_crit("failed to find PWM channel for clock event"); + return -EINVAL; + } pwm.event_id = channel; samsung_timer_resources(); samsung_clockevent_init(); - samsung_clocksource_init(); + + return samsung_clocksource_init(); } void __init samsung_pwm_clocksource_init(void __iomem *base, @@ -417,8 +419,8 @@ void __init samsung_pwm_clocksource_init(void __iomem *base, } #ifdef CONFIG_CLKSRC_OF -static void __init samsung_pwm_alloc(struct device_node *np, - const struct samsung_pwm_variant *variant) +static int __init samsung_pwm_alloc(struct device_node *np, + const struct samsung_pwm_variant *variant) { struct property *prop; const __be32 *cur; @@ -441,14 +443,16 @@ static void __init samsung_pwm_alloc(struct device_node *np, pwm.base = of_iomap(np, 0); if (!pwm.base) { pr_err("%s: failed to map PWM registers\n", __func__); - return; + return -ENXIO; } pwm.timerclk = of_clk_get_by_name(np, "timers"); - if (IS_ERR(pwm.timerclk)) - panic("failed to get timers clock for timer"); + if (IS_ERR(pwm.timerclk)) { + pr_crit("failed to get timers clock for timer"); + return PTR_ERR(pwm.timerclk); + } - _samsung_pwm_clocksource_init(); + return _samsung_pwm_clocksource_init(); } static const struct samsung_pwm_variant s3c24xx_variant = { @@ -458,9 +462,9 @@ static const struct samsung_pwm_variant s3c24xx_variant = { .tclk_mask = (1 << 4), }; -static void __init s3c2410_pwm_clocksource_init(struct device_node *np) +static int __init s3c2410_pwm_clocksource_init(struct device_node *np) { - samsung_pwm_alloc(np, &s3c24xx_variant); + return samsung_pwm_alloc(np, &s3c24xx_variant); } CLOCKSOURCE_OF_DECLARE(s3c2410_pwm, "samsung,s3c2410-pwm", s3c2410_pwm_clocksource_init); @@ -471,9 +475,9 @@ static const struct samsung_pwm_variant s3c64xx_variant = { .tclk_mask = (1 << 7) | (1 << 6) | (1 << 5), }; -static void __init s3c64xx_pwm_clocksource_init(struct device_node *np) +static int __init s3c64xx_pwm_clocksource_init(struct device_node *np) { - samsung_pwm_alloc(np, &s3c64xx_variant); + return samsung_pwm_alloc(np, &s3c64xx_variant); } CLOCKSOURCE_OF_DECLARE(s3c6400_pwm, "samsung,s3c6400-pwm", s3c64xx_pwm_clocksource_init); @@ -484,9 +488,9 @@ static const struct samsung_pwm_variant s5p64x0_variant = { .tclk_mask = 0, }; -static void __init s5p64x0_pwm_clocksource_init(struct device_node *np) +static int __init s5p64x0_pwm_clocksource_init(struct device_node *np) { - samsung_pwm_alloc(np, &s5p64x0_variant); + return samsung_pwm_alloc(np, &s5p64x0_variant); } CLOCKSOURCE_OF_DECLARE(s5p6440_pwm, "samsung,s5p6440-pwm", s5p64x0_pwm_clocksource_init); @@ -497,9 +501,9 @@ static const struct samsung_pwm_variant s5p_variant = { .tclk_mask = (1 << 5), }; -static void __init s5p_pwm_clocksource_init(struct device_node *np) +static int __init s5p_pwm_clocksource_init(struct device_node *np) { - samsung_pwm_alloc(np, &s5p_variant); + return samsung_pwm_alloc(np, &s5p_variant); } CLOCKSOURCE_OF_DECLARE(s5pc100_pwm, "samsung,s5pc100-pwm", s5p_pwm_clocksource_init); #endif |