clocksource: convert ARM 32-bit down counting clocksources
Convert SP804, MXC, Nomadik and Orion 32-bit down-counting clocksources
to generic mmio clocksource infrastructure.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Alessandro Rubini <rubini@unipv.it>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index 6ef3342..445b05e 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -32,35 +32,17 @@
#define TIMER_FREQ_KHZ (1000)
#define TIMER_RELOAD (TIMER_FREQ_KHZ * 1000 / HZ)
-static void __iomem *clksrc_base;
-
-static cycle_t sp804_read(struct clocksource *cs)
-{
- return ~readl(clksrc_base + TIMER_VALUE);
-}
-
-static struct clocksource clocksource_sp804 = {
- .name = "timer3",
- .rating = 200,
- .read = sp804_read,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
void __init sp804_clocksource_init(void __iomem *base)
{
- struct clocksource *cs = &clocksource_sp804;
-
- clksrc_base = base;
-
/* setup timer 0 as free-running clocksource */
- writel(0, clksrc_base + TIMER_CTRL);
- writel(0xffffffff, clksrc_base + TIMER_LOAD);
- writel(0xffffffff, clksrc_base + TIMER_VALUE);
+ writel(0, base + TIMER_CTRL);
+ writel(0xffffffff, base + TIMER_LOAD);
+ writel(0xffffffff, base + TIMER_VALUE);
writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
- clksrc_base + TIMER_CTRL);
+ base + TIMER_CTRL);
- clocksource_register_khz(cs, TIMER_FREQ_KHZ);
+ clocksource_mmio_init(base + TIMER_VALUE, "timer3",
+ TIMER_FREQ_KHZ * 1000, 200, 32, clocksource_mmio_readl_down);
}