diff options
author | Tony Lindgren <tony@atomide.com> | 2009-05-25 22:08:33 +0400 |
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committer | Tony Lindgren <tony@atomide.com> | 2009-05-25 22:08:33 +0400 |
commit | bed8b97d88b56fdad5677585262e20c5f0a1a8e2 (patch) | |
tree | be5cccc4cd606ea9cf4890077d9b25319f220a80 /arch/arm/plat-omap/common.c | |
parent | 59a3759d0fe8d969888c741bb33f4946e4d3750d (diff) | |
download | linux-bed8b97d88b56fdad5677585262e20c5f0a1a8e2.tar.xz |
ARM: OMAP2/3: Remove OMAP2_32KSYNCT_BASE
Use processor specific defines instead.
As an extra bonus, this patch fixes the problem of CONFIG_DEBUG_SPINLOCK
calling sched_clock before we have things initialized:
http://patchwork.kernel.org/patch/15810/
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/common.c')
-rw-r--r-- | arch/arm/plat-omap/common.c | 69 |
1 files changed, 58 insertions, 11 deletions
diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c index 433021f3d7cc..e1add789835f 100644 --- a/arch/arm/plat-omap/common.c +++ b/arch/arm/plat-omap/common.c @@ -175,25 +175,61 @@ console_initcall(omap_add_serial_console); * but systems won't necessarily want to spend resources that way. */ -#if defined(CONFIG_ARCH_OMAP16XX) -#define TIMER_32K_SYNCHRONIZED 0xfffbc410 -#elif defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) -#define TIMER_32K_SYNCHRONIZED (OMAP2_32KSYNCT_BASE + 0x10) -#endif +#define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410 -#ifdef TIMER_32K_SYNCHRONIZED +#if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) #include <linux/clocksource.h> -static cycle_t omap_32k_read(struct clocksource *cs) +#ifdef CONFIG_ARCH_OMAP16XX +static cycle_t omap16xx_32k_read(struct clocksource *cs) +{ + return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED); +} +#else +#define omap16xx_32k_read NULL +#endif + +#ifdef CONFIG_ARCH_OMAP2420 +static cycle_t omap2420_32k_read(struct clocksource *cs) +{ + return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10); +} +#else +#define omap2420_32k_read NULL +#endif + +#ifdef CONFIG_ARCH_OMAP2430 +static cycle_t omap2430_32k_read(struct clocksource *cs) +{ + return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10); +} +#else +#define omap2430_32k_read NULL +#endif + +#ifdef CONFIG_ARCH_OMAP34XX +static cycle_t omap34xx_32k_read(struct clocksource *cs) { - return omap_readl(TIMER_32K_SYNCHRONIZED); + return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10); +} +#else +#define omap34xx_32k_read NULL +#endif + +/* + * Kernel assumes that sched_clock can be called early but may not have + * things ready yet. + */ +static cycle_t omap_32k_read_dummy(struct clocksource *cs) +{ + return 0; } static struct clocksource clocksource_32k = { .name = "32k_counter", .rating = 250, - .read = omap_32k_read, + .read = omap_32k_read_dummy, .mask = CLOCKSOURCE_MASK(32), .shift = 10, .flags = CLOCK_SOURCE_IS_CONTINUOUS, @@ -207,7 +243,7 @@ unsigned long long sched_clock(void) { unsigned long long ret; - ret = (unsigned long long)omap_32k_read(&clocksource_32k); + ret = (unsigned long long)clocksource_32k.read(&clocksource_32k); ret = (ret * clocksource_32k.mult_orig) >> clocksource_32k.shift; return ret; } @@ -220,6 +256,17 @@ static int __init omap_init_clocksource_32k(void) if (cpu_is_omap16xx() || cpu_class_is_omap2()) { struct clk *sync_32k_ick; + if (cpu_is_omap16xx()) + clocksource_32k.read = omap16xx_32k_read; + else if (cpu_is_omap2420()) + clocksource_32k.read = omap2420_32k_read; + else if (cpu_is_omap2430()) + clocksource_32k.read = omap2430_32k_read; + else if (cpu_is_omap34xx()) + clocksource_32k.read = omap34xx_32k_read; + else + return -ENODEV; + sync_32k_ick = clk_get(NULL, "omap_32ksync_ick"); if (sync_32k_ick) clk_enable(sync_32k_ick); @@ -234,7 +281,7 @@ static int __init omap_init_clocksource_32k(void) } arch_initcall(omap_init_clocksource_32k); -#endif /* TIMER_32K_SYNCHRONIZED */ +#endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */ /* Global address base setup code */ |