[RFC,v2,4/5] dts: bcm2837: add per-cpu clock devices
diff mbox series

Message ID 20190520104708.11980-5-nsaenzjulienne@suse.de
State Superseded
Headers show
Series
  • cpufreq support for the Raspberry Pi
Related show

Commit Message

Nicolas Saenz Julienne May 20, 2019, 10:47 a.m. UTC
The four CPUs share a same clock source called pllb_arm. The clock can
be scaled through the raspberrypi firmware interface.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 arch/arm/boot/dts/bcm2837.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Stefan Wahren May 20, 2019, 12:19 p.m. UTC | #1
Hi Nicolas,

On 20.05.19 12:47, Nicolas Saenz Julienne wrote:
> The four CPUs share a same clock source called pllb_arm. The clock can
> be scaled through the raspberrypi firmware interface.
do you see a problem with applying this also to bcm2835.dtsi and
bcm2836.dtsi?
Nicolas Saenz Julienne May 21, 2019, 11:40 a.m. UTC | #2
On Mon, 2019-05-20 at 14:19 +0200, Stefan Wahren wrote:
> Hi Nicolas,
> 
> On 20.05.19 12:47, Nicolas Saenz Julienne wrote:
> > The four CPUs share a same clock source called pllb_arm. The clock can
> > be scaled through the raspberrypi firmware interface.
> do you see a problem with applying this also to bcm2835.dtsi and
> bcm2836.dtsi?

Not at all. I just need to test it first.

Patch
diff mbox series

diff --git a/arch/arm/boot/dts/bcm2837.dtsi b/arch/arm/boot/dts/bcm2837.dtsi
index beb6c502dadc..a8fea6696b42 100644
--- a/arch/arm/boot/dts/bcm2837.dtsi
+++ b/arch/arm/boot/dts/bcm2837.dtsi
@@ -44,6 +44,8 @@ 
 			reg = <0>;
 			enable-method = "spin-table";
 			cpu-release-addr = <0x0 0x000000d8>;
+			clocks = <&clocks BCM2835_PLLB_ARM>;
+			clock-names = "pllb_arm";
 		};
 
 		cpu1: cpu@1 {
@@ -52,6 +54,8 @@ 
 			reg = <1>;
 			enable-method = "spin-table";
 			cpu-release-addr = <0x0 0x000000e0>;
+			clocks = <&clocks BCM2835_PLLB_ARM>;
+			clock-names = "pllb_arm";
 		};
 
 		cpu2: cpu@2 {
@@ -60,6 +64,8 @@ 
 			reg = <2>;
 			enable-method = "spin-table";
 			cpu-release-addr = <0x0 0x000000e8>;
+			clocks = <&clocks BCM2835_PLLB_ARM>;
+			clock-names = "pllb_arm";
 		};
 
 		cpu3: cpu@3 {
@@ -68,6 +74,8 @@ 
 			reg = <3>;
 			enable-method = "spin-table";
 			cpu-release-addr = <0x0 0x000000f0>;
+			clocks = <&clocks BCM2835_PLLB_ARM>;
+			clock-names = "pllb_arm";
 		};
 	};
 };