diff options
| -rw-r--r-- | arch/arm/plat-omap/dmtimer.c | 46 | ||||
| -rw-r--r-- | include/asm-arm/arch-omap/dmtimer.h | 1 |
2 files changed, 31 insertions, 16 deletions
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c index bfccebc77515..804a53534370 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -107,6 +107,14 @@ static struct omap_dm_timer dm_timers[] = { { .phys_base = 0x4808a000, .irq = INT_24XX_GPTIMER12 }, }; +static const char *dm_source_names[] = { + "sys_ck", + "func_32k_ck", + "alt_ck" +}; + +static struct clk *dm_source_clocks[3]; + #else #error OMAP architecture not supported! @@ -114,7 +122,6 @@ static struct omap_dm_timer dm_timers[] = { #endif static const int dm_timer_count = ARRAY_SIZE(dm_timers); - static spinlock_t dm_timer_lock; static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg) @@ -159,9 +166,8 @@ static void omap_dm_timer_reset(struct omap_dm_timer *timer) omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l); } -static void omap_dm_timer_reserve(struct omap_dm_timer *timer) +static void omap_dm_timer_prepare(struct omap_dm_timer *timer) { - timer->reserved = 1; #ifdef CONFIG_ARCH_OMAP2 clk_enable(timer->iclk); clk_enable(timer->fclk); @@ -181,11 +187,14 @@ struct omap_dm_timer *omap_dm_timer_request(void) continue; timer = &dm_timers[i]; - omap_dm_timer_reserve(timer); + timer->reserved = 1; break; } spin_unlock_irqrestore(&dm_timer_lock, flags); + if (timer != NULL) + omap_dm_timer_prepare(timer); + return timer; } @@ -204,9 +213,11 @@ struct omap_dm_timer *omap_dm_timer_request_specific(int id) } timer = &dm_timers[id-1]; - omap_dm_timer_reserve(timer); + timer->reserved = 1; spin_unlock_irqrestore(&dm_timer_lock, flags); + omap_dm_timer_prepare(timer); + return timer; } @@ -318,21 +329,12 @@ void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) { - static const char *source_timers[] = { - "sys_ck", - "func_32k_ck", - "alt_ck" - }; - struct clk *parent; - if (source < 0 || source >= 3) return; - parent = clk_get(NULL, source_timers[source]); clk_disable(timer->fclk); - clk_set_parent(timer->fclk, parent); + clk_set_parent(timer->fclk, dm_source_clocks[source]); clk_enable(timer->fclk); - clk_put(parent); /* When the functional clock disappears, too quick writes seem to * cause an abort. */ @@ -362,7 +364,7 @@ void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, u32 l; l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); - if (enable) + if (enable) l |= OMAP_TIMER_CTRL_CE; else l &= ~OMAP_TIMER_CTRL_CE; @@ -421,6 +423,11 @@ unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) return omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG); } +void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value) +{ + return omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value); +} + int omap_dm_timers_active(void) { int i; @@ -445,6 +452,13 @@ int omap_dm_timer_init(void) return -ENODEV; spin_lock_init(&dm_timer_lock); +#ifdef CONFIG_ARCH_OMAP2 + for (i = 0; i < ARRAY_SIZE(dm_source_names); i++) { + dm_source_clocks[i] = clk_get(NULL, dm_source_names[i]); + BUG_ON(dm_source_clocks[i] == NULL); + } +#endif + for (i = 0; i < dm_timer_count; i++) { #ifdef CONFIG_ARCH_OMAP2 char clk_name[16]; diff --git a/include/asm-arm/arch-omap/dmtimer.h b/include/asm-arm/arch-omap/dmtimer.h index 5b58e3d62742..7a289ff07404 100644 --- a/include/asm-arm/arch-omap/dmtimer.h +++ b/include/asm-arm/arch-omap/dmtimer.h @@ -73,6 +73,7 @@ void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int valu unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer); void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value); unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer); +void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value); int omap_dm_timers_active(void); |