Benoit,
On Mon, Sep 10, 2012 at 7:09 PM, Shilimkar, Santosh
<santosh.shilimkar@xxxxxx> wrote:
> On Mon, Sep 10, 2012 at 6:44 PM, Benoit Cousson <b-cousson@xxxxxx> wrote:
>>
[...]
>> >> Silly question: Don't we have one arch-timer per CPU?
>> >>
>> > It is per CPU just like A9 TWD
>>
>> Shouldn't we have two nodes then?
>>
> I need to check this but arch timer DT node should be same
> as the twd DT node. May be one node with reference to
> each CPU node should do but am not too sure about the DT
> nodes and how all that work.
>
Here is an updated patch based on our discussion. Thanks for comments.
Let me know if you are ok with this version.
>From 98f6a3b4b52ef7c76ed8b19bf9257c51ee5d7323 Mon Sep 17 00:00:00 2001
From: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Date: Mon, 13 Aug 2012 14:39:03 +0530
Subject: [PATCH] ARM: OMAP5: Enable arch timer support
Enable Cortex A15 generic timer support for OMAP5 based SOCs.
The CPU local timers run on the free running real time counter clock.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
---
arch/arm/boot/dts/omap5.dtsi | 12 ++++++++++++
arch/arm/mach-omap2/Kconfig | 1 +
arch/arm/mach-omap2/timer.c | 7 +++++++
3 files changed, 20 insertions(+)
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 57e5270..7b986ed 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -33,9 +33,21 @@
cpus {
cpu@0 {
compatible = "arm,cortex-a15";
+ timer {
+ compatible = "arm,armv7-timer";
+ /* 14th PPI IRQ, active low level-sensitive */
+ interrupts = <1 14 0x308>;
+ clock-frequency = <6144000>;
+ };
};
cpu@1 {
compatible = "arm,cortex-a15";
+ timer {
+ compatible = "arm,armv7-timer";
+ /* 14th PPI IRQ, active low level-sensitive */
+ interrupts = <1 14 0x308>;
+ clock-frequency = <6144000>;
+ };
};
};
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 2120f90..53fb77c 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -73,6 +73,7 @@ config SOC_OMAP5
select ARM_GIC
select HAVE_SMP
select SOC_HAS_REALTIME_COUNTER
+ select ARM_ARCH_TIMER
comment "OMAP Core Type"
depends on ARCH_OMAP2
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 8f5b88b..46982d0 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -41,6 +41,7 @@
#include <plat/dmtimer.h>
#include <asm/smp_twd.h>
#include <asm/sched_clock.h>
+#include <asm/arch_timer.h>
#include "common.h"
#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>
@@ -481,9 +482,15 @@ OMAP_SYS_TIMER(4)
#ifdef CONFIG_SOC_OMAP5
static void __init omap5_timer_init(void)
{
+ int err;
+
omap2_gp_clockevent_init(1, OMAP4_CLKEV_SOURCE);
omap2_clocksource_init(2, OMAP4_MPU_SOURCE);
realtime_counter_init();
+
+ err = arch_timer_of_register();
+ if (err)
+ pr_err("%s: arch_timer_register failed %d\n", __func__, err);
}
OMAP_SYS_TIMER(5)
#endif
--
1.7.9.5
Attachment:
0001-ARM-OMAP5-Enable-arch-timer-support.patch
Description: Binary data
