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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-23 15:15:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-23 15:15:27 -0700
commit42cd71bf1e3a081b3150018bbf448cb6c8a844a5 (patch)
tree4a5d2eb0444255e4ad827a76dbd1417dd3876db6 /arch/arm/plat-mxc/time.c
parentf5039935ac685b3b9b8c13fbc33cac8643dee32e (diff)
parent9a55d9752d8abfc62f1ab05ccc790d22a0c8e7c0 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (137 commits) ARM: bcmring: convert to use sp804 clockevents ARM: bcmring: convert to sp804 clocksource ARM: 6912/1: bcmring: Add clkdev table in init_early clockevents: ARM sp804: obtain sp804 timer rate via clks clockevents: ARM sp804: allow clockevent name to be specified clocksource: ARM sp804: obtain sp804 timer rate via clks clocksource: ARM sp804: allow clocksource name to be specified clocksource: convert OMAP1 to 32-bit down counting clocksource clocksource: convert MXS timrotv2 to 32-bit down counting clocksource clocksource: convert SPEAr platforms 16-bit up counting clocksource clocksource: convert Integrator/AP 16-bit down counting clocksource clocksource: convert W90x900 24-bit down counting clocksource clocksource: convert ARM 32-bit down counting clocksources clocksource: convert ARM 32-bit up counting clocksources clocksource: add common mmio clocksource ARM: update sa1100 to reflect PXA updates ARM: omap1: convert to using readl/writel instead of volatile struct ARM: omap1: delete useless interrupt handler ARM: s5p: consolidate selection of timer register ARM: 6939/1: fix missing 'cpu_relax()' declaration ...
Diffstat (limited to 'arch/arm/plat-mxc/time.c')
-rw-r--r--arch/arm/plat-mxc/time.c40
1 files changed, 8 insertions, 32 deletions
diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c
index 2237ff8b434..4b0fe285e83 100644
--- a/arch/arm/plat-mxc/time.c
+++ b/arch/arm/plat-mxc/time.c
@@ -54,7 +54,7 @@
#define MX2_TSTAT_CAPT (1 << 1)
#define MX2_TSTAT_COMP (1 << 0)
-/* MX31, MX35, MX25, MXC91231, MX5 */
+/* MX31, MX35, MX25, MX5 */
#define V2_TCTL_WAITEN (1 << 3) /* Wait enable mode */
#define V2_TCTL_CLK_IPG (1 << 6)
#define V2_TCTL_FRR (1 << 9)
@@ -106,56 +106,32 @@ static void gpt_irq_acknowledge(void)
__raw_writel(V2_TSTAT_OF1, timer_base + V2_TSTAT);
}
-static cycle_t dummy_get_cycles(struct clocksource *cs)
-{
- return 0;
-}
-
-static cycle_t mx1_2_get_cycles(struct clocksource *cs)
-{
- return __raw_readl(timer_base + MX1_2_TCN);
-}
-
-static cycle_t v2_get_cycles(struct clocksource *cs)
-{
- return __raw_readl(timer_base + V2_TCN);
-}
-
-static struct clocksource clocksource_mxc = {
- .name = "mxc_timer1",
- .rating = 200,
- .read = dummy_get_cycles,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
+static void __iomem *sched_clock_reg;
static DEFINE_CLOCK_DATA(cd);
unsigned long long notrace sched_clock(void)
{
- cycle_t cyc = clocksource_mxc.read(&clocksource_mxc);
+ cycle_t cyc = sched_clock_reg ? __raw_readl(sched_clock_reg) : 0;
return cyc_to_sched_clock(&cd, cyc, (u32)~0);
}
static void notrace mxc_update_sched_clock(void)
{
- cycle_t cyc = clocksource_mxc.read(&clocksource_mxc);
+ cycle_t cyc = sched_clock_reg ? __raw_readl(sched_clock_reg) : 0;
update_sched_clock(&cd, cyc, (u32)~0);
}
static int __init mxc_clocksource_init(struct clk *timer_clk)
{
unsigned int c = clk_get_rate(timer_clk);
+ void __iomem *reg = timer_base + (timer_is_v2() ? V2_TCN : MX1_2_TCN);
- if (timer_is_v2())
- clocksource_mxc.read = v2_get_cycles;
- else
- clocksource_mxc.read = mx1_2_get_cycles;
+ sched_clock_reg = reg;
init_sched_clock(&cd, mxc_update_sched_clock, 32, c);
- clocksource_register_hz(&clocksource_mxc, c);
-
- return 0;
+ return clocksource_mmio_init(reg, "mxc_timer1", c, 200, 32,
+ clocksource_mmio_readl_up);
}
/* clock event */