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ARM: ux500: Provide local timer support for Device Tree

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This enables local timer (AKA: private timer) support for
all u8500 based hardware using DT.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Lee Jones 2012-03-16 09:53:24 +00:00 • committed by Arnd Bergmann
parent 15daf691e8
commit 71de5c46e0
2 changed files with 14 additions and 3 deletions
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6
arch/arm/boot/dts/db8500.dtsi
View file

@ -42,6 +42,12 @@
interrupts = <0 7 0x4>;
};
timer@a0410600 {
compatible = "arm,cortex-a9-twd-timer";
reg = <0xa0410600 0x20>;
interrupts = <1 13 0x304>;
};
rtc@80154000 {
compatible = "stericsson,db8500-rtc";
reg = <0x80154000 0x1000>;

11
arch/arm/mach-ux500/timer.c
View file

@ -7,6 +7,7 @@
#include <linux/io.h>
#include <linux/errno.h>
#include <linux/clksrc-dbx500-prcmu.h>
#include <linux/of.h>
#include <asm/smp_twd.h>
@ -30,9 +31,13 @@ static void __init ux500_twd_init(void)
twd_local_timer = cpu_is_u5500() ? &u5500_twd_local_timer :
&u8500_twd_local_timer;
err = twd_local_timer_register(twd_local_timer);
if (err)
pr_err("twd_local_timer_register failed %d\n", err);
if (of_have_populated_dt())
twd_local_timer_of_register();
else {
err = twd_local_timer_register(twd_local_timer);
if (err)
pr_err("twd_local_timer_register failed %d\n", err);
}
}
#else
#define ux500_twd_init() do { } while(0)