diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-05-17 17:24:04 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-05-17 17:24:04 +0100 |
| commit | ac1d426e825ab5778995f2f6f053ca2e6b45c622 (patch) | |
| tree | 75b91356ca39463e0112931aa6790802fb1e07a2 /arch/arm/plat-omap/common.c | |
| parent | fda0e18c8a7a3e02747c2b045b4fcd2c920410b9 (diff) | |
| parent | a3685f00652af83f12b63e3b4ef48f29581ba48b (diff) | |
Merge branch 'devel-stable' into devel
Conflicts:
arch/arm/Kconfig
arch/arm/include/asm/system.h
arch/arm/mm/Kconfig
Diffstat (limited to 'arch/arm/plat-omap/common.c')
| -rw-r--r-- | arch/arm/plat-omap/common.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c index 088c1a03b94..f12f0e39ddf 100644 --- a/arch/arm/plat-omap/common.c +++ b/arch/arm/plat-omap/common.c @@ -44,9 +44,6 @@ #define NO_LENGTH_CHECK 0xffffffff -unsigned char omap_bootloader_tag[512]; -int omap_bootloader_tag_len; - struct omap_board_config_kernel *omap_board_config; int omap_board_config_size; @@ -100,10 +97,17 @@ EXPORT_SYMBOL(omap_get_var_config); #include <linux/clocksource.h> +/* + * offset_32k holds the init time counter value. It is then subtracted + * from every counter read to achieve a counter that counts time from the + * kernel boot (needed for sched_clock()). + */ +static u32 offset_32k __read_mostly; + #ifdef CONFIG_ARCH_OMAP16XX static cycle_t omap16xx_32k_read(struct clocksource *cs) { - return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED); + return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k; } #else #define omap16xx_32k_read NULL @@ -112,7 +116,7 @@ static cycle_t omap16xx_32k_read(struct clocksource *cs) #ifdef CONFIG_ARCH_OMAP2420 static cycle_t omap2420_32k_read(struct clocksource *cs) { - return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10); + return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k; } #else #define omap2420_32k_read NULL @@ -121,7 +125,7 @@ static cycle_t omap2420_32k_read(struct clocksource *cs) #ifdef CONFIG_ARCH_OMAP2430 static cycle_t omap2430_32k_read(struct clocksource *cs) { - return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10); + return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k; } #else #define omap2430_32k_read NULL @@ -130,7 +134,7 @@ static cycle_t omap2430_32k_read(struct clocksource *cs) #ifdef CONFIG_ARCH_OMAP3 static cycle_t omap34xx_32k_read(struct clocksource *cs) { - return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10); + return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k; } #else #define omap34xx_32k_read NULL @@ -139,7 +143,7 @@ static cycle_t omap34xx_32k_read(struct clocksource *cs) #ifdef CONFIG_ARCH_OMAP4 static cycle_t omap44xx_32k_read(struct clocksource *cs) { - return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10); + return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k; } #else #define omap44xx_32k_read NULL @@ -227,6 +231,8 @@ static int __init omap_init_clocksource_32k(void) clocksource_32k.mult = clocksource_hz2mult(32768, clocksource_32k.shift); + offset_32k = clocksource_32k.read(&clocksource_32k); + if (clocksource_register(&clocksource_32k)) printk(err, clocksource_32k.name); } |