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/plat-mxc/epit.c b/arch/arm/plat-mxc/epit.c
index d69d343..d3467f8 100644
--- a/arch/arm/plat-mxc/epit.c
+++ b/arch/arm/plat-mxc/epit.c
@@ -83,26 +83,12 @@
__raw_writel(EPITSR_OCIF, timer_base + EPITSR);
}
-static cycle_t epit_read(struct clocksource *cs)
-{
- return 0 - __raw_readl(timer_base + EPITCNR);
-}
-
-static struct clocksource clocksource_epit = {
- .name = "epit",
- .rating = 200,
- .read = epit_read,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
static int __init epit_clocksource_init(struct clk *timer_clk)
{
unsigned int c = clk_get_rate(timer_clk);
- clocksource_register_hz(&clocksource_epit, c);
-
- return 0;
+ return clocksource_mmio_init(timer_base + EPITCNR, "epit", c, 200, 32,
+ clocksource_mmio_readl_down);
}
/* clock event */