diff options
Diffstat (limited to 'arch/arm/mach-msm')
| -rw-r--r-- | arch/arm/mach-msm/timer.c | 38 |
1 files changed, 17 insertions, 21 deletions
diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index fc0646442e0..ca0a957d862 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -40,20 +40,7 @@ #define GPT_HZ 32768 -/* TODO: Remove these ifdefs */ -#if defined(CONFIG_ARCH_QSD8X50) -#define DGT_HZ (19200000 / 4) /* 19.2 MHz / 4 by default */ -#define MSM_DGT_SHIFT (0) -#elif defined(CONFIG_ARCH_MSM7X30) -#define DGT_HZ (24576000 / 4) /* 24.576 MHz (LPXO) / 4 by default */ -#define MSM_DGT_SHIFT (0) -#elif defined(CONFIG_ARCH_MSM8X60) || defined(CONFIG_ARCH_MSM8960) -#define DGT_HZ (27000000 / 4) /* 27 MHz (PXO) / 4 by default */ -#define MSM_DGT_SHIFT (0) -#else -#define DGT_HZ 19200000 /* 19.2 MHz or 600 KHz after shift */ -#define MSM_DGT_SHIFT (5) -#endif +#define MSM_DGT_SHIFT 5 static void __iomem *event_base; @@ -123,18 +110,23 @@ static void __iomem *source_base; static cycle_t msm_read_timer_count(struct clocksource *cs) { + return readl_relaxed(source_base + TIMER_COUNT_VAL); +} + +static cycle_t msm_read_timer_count_shift(struct clocksource *cs) +{ /* * Shift timer count down by a constant due to unreliable lower bits * on some targets. */ - return readl_relaxed(source_base + TIMER_COUNT_VAL) >> MSM_DGT_SHIFT; + return msm_read_timer_count(cs) >> MSM_DGT_SHIFT; } static struct clocksource msm_clocksource = { .name = "dg_timer", .rating = 300, .read = msm_read_timer_count, - .mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)), + .mask = CLOCKSOURCE_MASK(32), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -143,27 +135,31 @@ static void __init msm_timer_init(void) struct clock_event_device *ce = &msm_clockevent; struct clocksource *cs = &msm_clocksource; int res; + u32 dgt_hz; if (cpu_is_msm7x01()) { event_base = MSM_CSR_BASE; source_base = MSM_CSR_BASE + 0x10; + dgt_hz = 19200000 >> MSM_DGT_SHIFT; /* 600 KHz */ + cs->read = msm_read_timer_count_shift; + cs->mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)); } else if (cpu_is_msm7x30()) { event_base = MSM_CSR_BASE + 0x04; source_base = MSM_CSR_BASE + 0x24; + dgt_hz = 24576000 / 4; } else if (cpu_is_qsd8x50()) { event_base = MSM_CSR_BASE; source_base = MSM_CSR_BASE + 0x10; + dgt_hz = 19200000 / 4; } else if (cpu_is_msm8x60() || cpu_is_msm8960()) { event_base = MSM_TMR_BASE + 0x04; /* Use CPU0's timer as the global clock source. */ source_base = MSM_TMR0_BASE + 0x24; + dgt_hz = 27000000 / 4; + writel_relaxed(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL); } else BUG(); -#ifdef CONFIG_ARCH_MSM_SCORPIONMP - writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL); -#endif - writel_relaxed(0, event_base + TIMER_ENABLE); writel_relaxed(0, event_base + TIMER_CLEAR); writel_relaxed(~0, event_base + TIMER_MATCH_VAL); @@ -201,7 +197,7 @@ static void __init msm_timer_init(void) clockevents_register_device(ce); err: writel_relaxed(TIMER_ENABLE_EN, source_base + TIMER_ENABLE); - res = clocksource_register_hz(cs, DGT_HZ >> MSM_DGT_SHIFT); + res = clocksource_register_hz(cs, dgt_hz); if (res) pr_err("clocksource_register failed\n"); } |