* [PATCH] ARM: dts: rk3288: add arm,cpu-registers-not-fw-configured
@ 2014-11-25 18:54 Sonny Rao
2014-12-05 18:27 ` Olof Johansson
0 siblings, 1 reply; 2+ messages in thread
From: Sonny Rao @ 2014-11-25 18:54 UTC (permalink / raw)
To: Heiko Stuebner
Cc: linux-kernel, linux-rockchip, linux-arm-kernel, devicetree,
dianders, olof, Rob Herring, Pawel Moll, Mark Rutland,
Ian Campbell, Kumar Gala, Russell King, Kever Yang, eddie.cai,
Sonny Rao
This will enable use of physical arch timers on rk3288, where each
core comes out of reset with a different virtual offset. Using
physical timers will help with SMP booting on coreboot and older
u-boot and should also allow suspend-resume and cpu-hotplug to work on
all firmwares.
Firmware which does initialize the cpu registers properly at boot and
cpu-hotplug can remove this property from the device tree.
Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
---
arch/arm/boot/dts/rk3288.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index 0f50d5d..c861f52 100644
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi
@@ -139,6 +139,7 @@
timer {
compatible = "arm,armv7-timer";
+ arm,cpu-registers-not-fw-configured;
interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
<GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
--
2.1.2
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] ARM: dts: rk3288: add arm,cpu-registers-not-fw-configured
2014-11-25 18:54 [PATCH] ARM: dts: rk3288: add arm,cpu-registers-not-fw-configured Sonny Rao
@ 2014-12-05 18:27 ` Olof Johansson
0 siblings, 0 replies; 2+ messages in thread
From: Olof Johansson @ 2014-12-05 18:27 UTC (permalink / raw)
To: Sonny Rao
Cc: Heiko Stuebner, linux-kernel, linux-rockchip, linux-arm-kernel,
devicetree, dianders, Rob Herring, Pawel Moll, Mark Rutland,
Ian Campbell, Kumar Gala, Russell King, Kever Yang, eddie.cai
On Tue, Nov 25, 2014 at 10:54:00AM -0800, Sonny Rao wrote:
> This will enable use of physical arch timers on rk3288, where each
> core comes out of reset with a different virtual offset. Using
> physical timers will help with SMP booting on coreboot and older
> u-boot and should also allow suspend-resume and cpu-hotplug to work on
> all firmwares.
>
> Firmware which does initialize the cpu registers properly at boot and
> cpu-hotplug can remove this property from the device tree.
>
> Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
> ---
> arch/arm/boot/dts/rk3288.dtsi | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> index 0f50d5d..c861f52 100644
> --- a/arch/arm/boot/dts/rk3288.dtsi
> +++ b/arch/arm/boot/dts/rk3288.dtsi
> @@ -139,6 +139,7 @@
>
> timer {
> compatible = "arm,armv7-timer";
> + arm,cpu-registers-not-fw-configured;
> interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
Applied, thanks.
-Olof
^ permalink raw reply [flat|nested] 2+ messages in thread
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2014-11-25 18:54 [PATCH] ARM: dts: rk3288: add arm,cpu-registers-not-fw-configured Sonny Rao
2014-12-05 18:27 ` Olof Johansson
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