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Subject[PATCH 1/6] arm: use devicetree to get smp_twd clock
Date
From: Rob Herring <rob.herring@calxeda.com>

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
arch/arm/kernel/smp_twd.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index b22d700..600fbcc 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -237,12 +237,15 @@ static irqreturn_t twd_handler(int irq, void *dev_id)
return IRQ_NONE;
}

-static struct clk *twd_get_clock(void)
+static struct clk *twd_get_clock(struct device_node *np)
{
- struct clk *clk;
+ struct clk *clk = NULL;
int err;

- clk = clk_get_sys("smp_twd", NULL);
+ if (np)
+ clk = of_clk_get(np, 0);
+ if (!clk)
+ clk = clk_get_sys("smp_twd", NULL);
if (IS_ERR(clk)) {
pr_err("smp_twd: clock not found: %d\n", (int)PTR_ERR(clk));
return clk;
@@ -263,6 +266,7 @@ static struct clk *twd_get_clock(void)
return ERR_PTR(err);
}

+ twd_timer_rate = clk_get_rate(clk);
return clk;
}

@@ -273,12 +277,7 @@ static int __cpuinit twd_timer_setup(struct clock_event_device *clk)
{
struct clock_event_device **this_cpu_clk;

- if (!twd_clk)
- twd_clk = twd_get_clock();
-
- if (!IS_ERR_OR_NULL(twd_clk))
- twd_timer_rate = clk_get_rate(twd_clk);
- else
+ if (IS_ERR_OR_NULL(twd_clk))
twd_calibrate_rate();

__raw_writel(0, twd_base + TWD_TIMER_CONTROL);
@@ -349,6 +348,10 @@ int __init twd_local_timer_register(struct twd_local_timer *tlt)
if (!twd_base)
return -ENOMEM;

+ twd_clk = twd_get_clock(NULL);
+
+ twd_clk = twd_get_clock(NULL);
+
return twd_local_timer_common_register();
}

@@ -383,6 +386,8 @@ void __init twd_local_timer_of_register(void)
goto out;
}

+ twd_clk = twd_get_clock(np);
+
err = twd_local_timer_common_register();

out:
--
1.7.11.7


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