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authorMichal Simek <michal.simek@xilinx.com>2013-03-20 13:24:59 +0400
committerMichal Simek <michal.simek@xilinx.com>2013-04-04 11:09:10 +0400
commitc5263bb8b7944f1e34b36b5ea8a9119fc48a31ae (patch)
tree650ec881b4d9516263a1ea58dc5f0cceaeb6d9d1 /arch/arm/mach-zynq
parente932900a3279b5dbb6d8f43c7b369003620e137c (diff)
downloadlinux-c5263bb8b7944f1e34b36b5ea8a9119fc48a31ae.tar.xz
arm: zynq: Move timer to clocksource interface
Use clocksource timer initialization. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/arm/mach-zynq')
-rw-r--r--arch/arm/mach-zynq/common.c2
-rw-r--r--arch/arm/mach-zynq/common.h2
-rw-r--r--arch/arm/mach-zynq/timer.c43
3 files changed, 21 insertions, 26 deletions
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index 76493b050beb..68e0907de5d0 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -78,7 +78,7 @@ static void __init xilinx_zynq_timer_init(void)
xilinx_zynq_clocks_init(slcr);
- xttcps_timer_init();
+ clocksource_of_init();
}
/**
diff --git a/arch/arm/mach-zynq/common.h b/arch/arm/mach-zynq/common.h
index 8b4dbbaa01cf..5050bb10bb12 100644
--- a/arch/arm/mach-zynq/common.h
+++ b/arch/arm/mach-zynq/common.h
@@ -17,6 +17,4 @@
#ifndef __MACH_ZYNQ_COMMON_H__
#define __MACH_ZYNQ_COMMON_H__
-void __init xttcps_timer_init(void);
-
#endif
diff --git a/arch/arm/mach-zynq/timer.c b/arch/arm/mach-zynq/timer.c
index 82357d94a0e0..ab5b839e22f0 100644
--- a/arch/arm/mach-zynq/timer.c
+++ b/arch/arm/mach-zynq/timer.c
@@ -22,7 +22,6 @@
#include <linux/of_irq.h>
#include <linux/slab.h>
#include <linux/clk-provider.h>
-#include "common.h"
/*
* This driver configures the 2 16-bit count-up timers as follows:
@@ -260,8 +259,10 @@ static void __init xttc_setup_clocksource(struct clk *clk, void __iomem *base)
ttccs->xttc.clk = clk;
err = clk_prepare_enable(ttccs->xttc.clk);
- if (WARN_ON(err))
+ if (WARN_ON(err)) {
+ kfree(ttccs);
return;
+ }
ttccs->xttc.clk_rate_change_nb.notifier_call =
xttcps_rate_change_clocksource_cb;
@@ -290,9 +291,10 @@ static void __init xttc_setup_clocksource(struct clk *clk, void __iomem *base)
err = clocksource_register_hz(&ttccs->cs,
clk_get_rate(ttccs->xttc.clk) / PRESCALE);
- if (WARN_ON(err))
+ if (WARN_ON(err)) {
+ kfree(ttccs);
return;
-
+ }
}
static int xttcps_rate_change_clockevent_cb(struct notifier_block *nb,
@@ -341,8 +343,10 @@ static void __init xttc_setup_clockevent(struct clk *clk,
ttcce->xttc.clk = clk;
err = clk_prepare_enable(ttcce->xttc.clk);
- if (WARN_ON(err))
+ if (WARN_ON(err)) {
+ kfree(ttcce);
return;
+ }
ttcce->xttc.clk_rate_change_nb.notifier_call =
xttcps_rate_change_clockevent_cb;
@@ -373,8 +377,10 @@ static void __init xttc_setup_clockevent(struct clk *clk,
err = request_irq(irq, xttcps_clock_event_interrupt,
IRQF_DISABLED | IRQF_TIMER,
ttcce->ce.name, ttcce);
- if (WARN_ON(err))
+ if (WARN_ON(err)) {
+ kfree(ttcce);
return;
+ }
clockevents_config_and_register(&ttcce->ce,
clk_get_rate(ttcce->xttc.clk) / PRESCALE, 1, 0xfffe);
@@ -386,11 +392,17 @@ static void __init xttc_setup_clockevent(struct clk *clk,
* Initializes the timer hardware and register the clock source and clock event
* timers with Linux kernal timer framework
*/
-static void __init xttcps_timer_init_of(struct device_node *timer)
+static void __init xttcps_timer_init(struct device_node *timer)
{
unsigned int irq;
void __iomem *timer_baseaddr;
struct clk *clk;
+ static int initialized;
+
+ if (initialized)
+ return;
+
+ initialized = 1;
/*
* Get the 1st Triple Timer Counter (TTC) block from the device tree
@@ -421,19 +433,4 @@ static void __init xttcps_timer_init_of(struct device_node *timer)
pr_info("%s #0 at %p, irq=%d\n", timer->name, timer_baseaddr, irq);
}
-void __init xttcps_timer_init(void)
-{
- const char * const timer_list[] = {
- "cdns,ttc",
- NULL
- };
- struct device_node *timer;
-
- timer = of_find_compatible_node(NULL, NULL, timer_list[0]);
- if (!timer) {
- pr_err("ERROR: no compatible timer found\n");
- BUG();
- }
-
- xttcps_timer_init_of(timer);
-}
+CLOCKSOURCE_OF_DECLARE(ttc, "cdns,ttc", xttcps_timer_init);