diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-s3c2412/clock.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-s3c2443/clock.c | 2 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/include/plat/clock.h | 5 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/pwm-clock.c | 28 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/time.c | 66 | ||||
| -rw-r--r-- | arch/arm/plat-s3c24xx/s3c2410-clock.c | 1 | ||||
| -rw-r--r-- | arch/arm/plat-s3c64xx/clock.c | 2 |
7 files changed, 71 insertions, 34 deletions
diff --git a/arch/arm/mach-s3c2412/clock.c b/arch/arm/mach-s3c2412/clock.c index 3ce15e082e7..a037df5e1c2 100644 --- a/arch/arm/mach-s3c2412/clock.c +++ b/arch/arm/mach-s3c2412/clock.c @@ -767,5 +767,6 @@ int __init s3c2412_baseclk_add(void) s3c2412_clkcon_enable(clkp, 0); } + s3c_pwmclk_init(); return 0; } diff --git a/arch/arm/mach-s3c2443/clock.c b/arch/arm/mach-s3c2443/clock.c index 363f3960878..fdd4ec335a7 100644 --- a/arch/arm/mach-s3c2443/clock.c +++ b/arch/arm/mach-s3c2443/clock.c @@ -1107,4 +1107,6 @@ void __init s3c2443_init_clocks(int xtal) (clkp->enable)(clkp, 0); } + + s3c_pwmclk_init(); } diff --git a/arch/arm/plat-s3c/include/plat/clock.h b/arch/arm/plat-s3c/include/plat/clock.h index ea1f3ffa971..a10622eed43 100644 --- a/arch/arm/plat-s3c/include/plat/clock.h +++ b/arch/arm/plat-s3c/include/plat/clock.h @@ -81,3 +81,8 @@ extern void s3c2443_setup_clocks(void); /* S3C64XX specific functions and clocks */ extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable); + +/* Init for pwm clock code */ + +extern void s3c_pwmclk_init(void); + diff --git a/arch/arm/plat-s3c/pwm-clock.c b/arch/arm/plat-s3c/pwm-clock.c index 988c0cd7ade..a318215ab53 100644 --- a/arch/arm/plat-s3c/pwm-clock.c +++ b/arch/arm/plat-s3c/pwm-clock.c @@ -407,7 +407,16 @@ static __init int clk_pwm_tin_register(struct clk *pwm) return clk_set_parent(pwm, parent); } -static __init int s3c24xx_pwmclk_init(void) +/** + * s3c_pwmclk_init() - initialise pwm clocks + * + * Initialise and register the clocks which provide the inputs for the + * pwm timer blocks. + * + * Note, this call is required by the time core, so must be called after + * the base clocks are added and before any of the initcalls are run. + */ +__init void s3c_pwmclk_init(void) { struct clk *clk_timers; unsigned int clk; @@ -416,7 +425,7 @@ static __init int s3c24xx_pwmclk_init(void) clk_timers = clk_get(NULL, "timers"); if (IS_ERR(clk_timers)) { printk(KERN_ERR "%s: no parent clock\n", __func__); - return -EINVAL; + return; } for (clk = 0; clk < ARRAY_SIZE(clk_timer_scaler); clk++) { @@ -424,7 +433,7 @@ static __init int s3c24xx_pwmclk_init(void) ret = s3c24xx_register_clock(&clk_timer_scaler[clk]); if (ret < 0) { printk(KERN_ERR "error adding pwm scaler%d clock\n", clk); - goto err; + return; } } @@ -432,7 +441,7 @@ static __init int s3c24xx_pwmclk_init(void) ret = s3c24xx_register_clock(&clk_timer_tclk[clk]); if (ret < 0) { printk(KERN_ERR "error adding pww tclk%d\n", clk); - goto err; + return; } } @@ -440,7 +449,7 @@ static __init int s3c24xx_pwmclk_init(void) ret = clk_pwm_tdiv_register(clk); if (ret < 0) { printk(KERN_ERR "error adding pwm%d tdiv clock\n", clk); - goto err; + return; } } @@ -448,14 +457,7 @@ static __init int s3c24xx_pwmclk_init(void) ret = clk_pwm_tin_register(&clk_tin[clk]); if (ret < 0) { printk(KERN_ERR "error adding pwm%d tin clock\n", clk); - goto err; + return; } } - - return 0; - - err: - return ret; } - -arch_initcall(s3c24xx_pwmclk_init); diff --git a/arch/arm/plat-s3c/time.c b/arch/arm/plat-s3c/time.c index a581ff7ba66..3b27b29da47 100644 --- a/arch/arm/plat-s3c/time.c +++ b/arch/arm/plat-s3c/time.c @@ -26,6 +26,7 @@ #include <linux/err.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/platform_device.h> #include <asm/system.h> #include <asm/leds.h> @@ -147,6 +148,10 @@ static struct irqaction s3c2410_timer_irq = { machine_is_anubis() || \ machine_is_osiris()) +static struct clk *tin; +static struct clk *tdiv; +static struct clk *timerclk; + /* * Set up timer interrupt, and return the current time in seconds. * @@ -162,12 +167,6 @@ static void s3c2410_timer_setup (void) tcnt = TICK_MAX; /* default value for tcnt */ - /* read the current timer configuration bits */ - - tcon = __raw_readl(S3C2410_TCON); - tcfg1 = __raw_readl(S3C2410_TCFG1); - tcfg0 = __raw_readl(S3C2410_TCFG0); - /* configure the system for whichever machine is in use */ if (use_tclk1_12()) { @@ -175,11 +174,13 @@ static void s3c2410_timer_setup (void) timer_usec_ticks = timer_mask_usec_ticks(1, 12000000); tcnt = 12000000 / HZ; + tcfg1 = __raw_readl(S3C2410_TCFG1); tcfg1 &= ~S3C2410_TCFG1_MUX4_MASK; tcfg1 |= S3C2410_TCFG1_MUX4_TCLK1; + __raw_writel(tcfg1, S3C2410_TCFG1); } else { unsigned long pclk; - struct clk *clk; + struct clk *tscaler; /* for the h1940 (and others), we use the pclk from the core * to generate the timer values. since values around 50 to @@ -190,29 +191,25 @@ static void s3c2410_timer_setup (void) * (8.45 ticks per usec) */ - /* this is used as default if no other timer can be found */ - - clk = clk_get(NULL, "timers"); - if (IS_ERR(clk)) - panic("failed to get clock for system timer"); - - clk_enable(clk); - - pclk = clk_get_rate(clk); + pclk = clk_get_rate(timerclk); /* configure clock tick */ timer_usec_ticks = timer_mask_usec_ticks(6, pclk); - tcfg1 &= ~S3C2410_TCFG1_MUX4_MASK; - tcfg1 |= S3C2410_TCFG1_MUX4_DIV2; + tscaler = clk_get_parent(tdiv); - tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK; - tcfg0 |= ((6 - 1) / 2) << S3C2410_TCFG_PRESCALER1_SHIFT; + clk_set_rate(tscaler, pclk / 3); + clk_set_rate(tdiv, pclk / 6); + clk_set_parent(tin, tdiv); - tcnt = (pclk / 6) / HZ; + tcnt = clk_get_rate(tin) / HZ; } + tcon = __raw_readl(S3C2410_TCON); + tcfg0 = __raw_readl(S3C2410_TCFG0); + tcfg1 = __raw_readl(S3C2410_TCFG1); + /* timers reload after counting zero, so reduce the count by 1 */ tcnt--; @@ -248,8 +245,35 @@ static void s3c2410_timer_setup (void) __raw_writel(tcon, S3C2410_TCON); } +static void __init s3c2410_timer_resources(void) +{ + struct platform_device tmpdev; + + tmpdev.dev.bus = &platform_bus_type; + tmpdev.id = 4; + + timerclk = clk_get(NULL, "timers"); + if (IS_ERR(timerclk)) + panic("failed to get clock for system timer"); + + clk_enable(timerclk); + + if (!use_tclk1_12()) { + tin = clk_get(&tmpdev.dev, "pwm-tin"); + if (IS_ERR(tin)) + panic("failed to get pwm-tin clock for system timer"); + + tdiv = clk_get(&tmpdev.dev, "pwm-tdiv"); + if (IS_ERR(tdiv)) + panic("failed to get pwm-tdiv clock for system timer"); + } + + clk_enable(tin); +} + static void __init s3c2410_timer_init(void) { + s3c2410_timer_resources(); s3c2410_timer_setup(); setup_irq(IRQ_TIMER4, &s3c2410_timer_irq); } diff --git a/arch/arm/plat-s3c24xx/s3c2410-clock.c b/arch/arm/plat-s3c24xx/s3c2410-clock.c index 4e07943c1e2..b61bdb79373 100644 --- a/arch/arm/plat-s3c24xx/s3c2410-clock.c +++ b/arch/arm/plat-s3c24xx/s3c2410-clock.c @@ -272,5 +272,6 @@ int __init s3c2410_baseclk_add(void) (clkslow & S3C2410_CLKSLOW_MPLL_OFF) ? "off" : "on", (clkslow & S3C2410_CLKSLOW_UCLK_OFF) ? "off" : "on"); + s3c_pwmclk_init(); return 0; } diff --git a/arch/arm/plat-s3c64xx/clock.c b/arch/arm/plat-s3c64xx/clock.c index 523da0cb55c..5a1e97e1f8f 100644 --- a/arch/arm/plat-s3c64xx/clock.c +++ b/arch/arm/plat-s3c64xx/clock.c @@ -277,4 +277,6 @@ void s3c64xx_register_clocks(void) (clkp->enable)(clkp, 0); } + + s3c_pwmclk_init(); } |