ARM: mxs: use CLKSRC_OF helper to initialize timer

Select CLKSRC_OF and use clocksource_of_init() to initialize timer, so
that the call to mxs_timer_init() in clock driver can be removed.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

4 files changed, 6 insertions, 9 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 865c25ded153..5a1f0c9e0ab0 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -473,6 +473,7 @@ config ARCH_MXS
         select ARCH_REQUIRE_GPIOLIB
         select CLKDEV_LOOKUP
         select CLKSRC_MMIO
+        select CLKSRC_OF
         select COMMON_CLK
         select GENERIC_CLOCKEVENTS
         select HAVE_CLK_PREPARE
diff --git a/arch/arm/mach-mxs/include/mach/common.h b/arch/arm/mach-mxs/include/mach/common.h
index be5a9c93cb2a..e043c4735b5a 100644
--- a/arch/arm/mach-mxs/include/mach/common.h
+++ b/arch/arm/mach-mxs/include/mach/common.h
@@ -13,7 +13,6 @@
 
 extern const u32 *mxs_get_ocotp(void);
 extern int mxs_reset_block(void __iomem *);
-extern void mxs_timer_init(void);
 extern void mxs_restart(char, const char *);
 extern int mxs_saif_clkmux_select(unsigned int clkmux);
 
diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
index e7b781d3788f..c1c0fb414c28 100644
--- a/arch/arm/mach-mxs/mach-mxs.c
+++ b/arch/arm/mach-mxs/mach-mxs.c
@@ -12,6 +12,7 @@
 
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/clocksource.h>
 #include <linux/can/platform/flexcan.h>
 #include <linux/delay.h>
 #include <linux/err.h>
@@ -168,11 +169,13 @@ static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
 static void __init imx23_timer_init(void)
 {
         mx23_clocks_init();
+        clocksource_of_init();
 }
 
 static void __init imx28_timer_init(void)
 {
         mx28_clocks_init();
+        clocksource_of_init();
 }
 
 enum mac_oui {
diff --git a/arch/arm/mach-mxs/timer.c b/arch/arm/mach-mxs/timer.c
index 421020498a1b..fe2903d7939a 100644
--- a/arch/arm/mach-mxs/timer.c
+++ b/arch/arm/mach-mxs/timer.c
@@ -242,18 +242,11 @@ static int __init mxs_clocksource_init(struct clk *timer_clk)
         return 0;
 }
 
-void __init mxs_timer_init(void)
+static void __init mxs_timer_init(struct device_node *np)
 {
-        struct device_node *np;
         struct clk *timer_clk;
         int irq;
 
-        np = of_find_compatible_node(NULL, NULL, "fsl,timrot");
-        if (!np) {
-                pr_err("%s: failed find timrot node\n", __func__);
-                return;
-        }
-
         timer_clk = clk_get_sys("timrot", NULL);
         if (IS_ERR(timer_clk)) {
                 pr_err("%s: failed to get clk\n", __func__);
@@ -304,3 +297,4 @@ void __init mxs_timer_init(void)
         irq = irq_of_parse_and_map(np, 0);
         setup_irq(irq, &mxs_timer_irq);
 }
+CLOCKSOURCE_OF_DECLARE(mxs, "fsl,timrot", mxs_timer_init)