clocksource: convert SPEAr platforms 16-bit up counting clocksource
Convert SPEAr platforms 16-bit up counting clocksource, which requires
a 16-bit register access read rather than 32-bit.
Acked-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-spear/time.c b/arch/arm/plat-spear/time.c
index dbb6e4f..0c77e42 100644
--- a/arch/arm/plat-spear/time.c
+++ b/arch/arm/plat-spear/time.c
@@ -70,19 +70,6 @@
static int clockevent_next_event(unsigned long evt,
struct clock_event_device *clk_event_dev);
-static cycle_t clocksource_read_cycles(struct clocksource *cs)
-{
- return (cycle_t) readw(gpt_base + COUNT(CLKSRC));
-}
-
-static struct clocksource clksrc = {
- .name = "tmr1",
- .rating = 200, /* its a pretty decent clock */
- .read = clocksource_read_cycles,
- .mask = 0xFFFF, /* 16 bits */
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
static void spear_clocksource_init(void)
{
u32 tick_rate;
@@ -103,7 +90,8 @@
writew(val, gpt_base + CR(CLKSRC));
/* register the clocksource */
- clocksource_register_hz(&clksrc, tick_rate);
+ clocksource_mmio_init(gpt_base + COUNT(CLKSRC), "tmr1", tick_rate,
+ 200, 16, clocksource_mmio_readw_up);
}
static struct clock_event_device clkevt = {