clocksource: convert ARM 32-bit up counting clocksources

Convert ixp4xx, lpc32xx, mxc, netx, pxa, sa1100, tcc8k, tegra and u300
to use the generic mmio clocksource recently introduced.

Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khc@pm.waw.pl>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Acked-by: "Hans J. Koch" <hjk@hansjkoch.de>
Acked-by: Colin Cross <ccross@android.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Olof Johansson <olof@lixom.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 31 deletions

diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c
index 2237ff8b434f..e4ac94a86832 100644
--- a/arch/arm/plat-mxc/time.c
+++ b/arch/arm/plat-mxc/time.c
@@ -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 */