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-rw-r--r--arch/arm/plat-nomadik/Kconfig1
-rw-r--r--arch/arm/plat-nomadik/timer.c31
2 files changed, 4 insertions, 28 deletions
diff --git a/arch/arm/plat-nomadik/Kconfig b/arch/arm/plat-nomadik/Kconfig
index 187f4e84bb22..18296ee68802 100644
--- a/arch/arm/plat-nomadik/Kconfig
+++ b/arch/arm/plat-nomadik/Kconfig
@@ -5,6 +5,7 @@
config PLAT_NOMADIK
bool
depends on ARCH_NOMADIK || ARCH_U8500
+ select CLKSRC_MMIO
default y
help
Common platform code for Nomadik and other ST-Ericsson
diff --git a/arch/arm/plat-nomadik/timer.c b/arch/arm/plat-nomadik/timer.c
index 41723402006b..ef74e157a9d5 100644
--- a/arch/arm/plat-nomadik/timer.c
+++ b/arch/arm/plat-nomadik/timer.c
@@ -26,29 +26,6 @@
void __iomem *mtu_base; /* Assigned by machine code */
/*
- * Kernel assumes that sched_clock can be called early
- * but the MTU may not yet be initialized.
- */
-static cycle_t nmdk_read_timer_dummy(struct clocksource *cs)
-{
- return 0;
-}
-
-/* clocksource: MTU decrements, so we negate the value being read. */
-static cycle_t nmdk_read_timer(struct clocksource *cs)
-{
- return -readl(mtu_base + MTU_VAL(0));
-}
-
-static struct clocksource nmdk_clksrc = {
- .name = "mtu_0",
- .rating = 200,
- .read = nmdk_read_timer_dummy,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-/*
* Override the global weak sched_clock symbol with this
* local implementation which uses the clocksource to get some
* better resolution when scheduling the kernel.
@@ -172,12 +149,10 @@ void __init nmdk_timer_init(void)
writel(0, mtu_base + MTU_BGLR(0));
writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0));
- /* Now the clock source is ready */
- nmdk_clksrc.read = nmdk_read_timer;
-
- if (clocksource_register_hz(&nmdk_clksrc, rate))
+ if (clocksource_mmio_init(mtu_base + MTU_VAL(0), "mtu_0",
+ rate, 200, 32, clocksource_mmio_readl_down))
pr_err("timer: failed to initialize clock source %s\n",
- nmdk_clksrc.name);
+ "mtu_0");
init_sched_clock(&cd, nomadik_update_sched_clock, 32, rate);