diff options
| author | Johan Jonker <jbx6244@gmail.com> | 2022-10-30 21:56:29 +0100 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2022-11-15 12:02:38 +0100 |
| commit | da74858a475782a3f16470907814c8cc5950ad68 (patch) | |
| tree | 6ffc918c8f09a2ff0124079cdc310535011534c5 | |
| parent | 9abf2313adc1ca1b6180c508c25f22f9395cc780 (diff) | |
ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188
The clock source and the sched_clock provided by the arm_global_timer
on Rockchip rk3066a/rk3188 are quite unstable because their rates
depend on the CPU frequency.
Recent changes to the arm_global_timer driver makes it impossible to use.
On the other side, the arm_global_timer has a higher rating than the
ROCKCHIP_TIMER, it will be selected by default by the time framework
while we want to use the stable Rockchip clock source.
Keep the arm_global_timer disabled in order to have the
DW_APB_TIMER (rk3066a) or ROCKCHIP_TIMER (rk3188) selected by default.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/f275ca8d-fd0a-26e5-b978-b7f3df815e0a@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| -rw-r--r-- | arch/arm/boot/dts/rk3188.dtsi | 1 | ||||
| -rw-r--r-- | arch/arm/boot/dts/rk3xxx.dtsi | 7 |
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi index cdd4a0bd5133..486a96ce2a09 100644 --- a/arch/arm/boot/dts/rk3188.dtsi +++ b/arch/arm/boot/dts/rk3188.dtsi @@ -607,7 +607,6 @@ &global_timer { interrupts = <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_EDGE_RISING)>; - status = "disabled"; }; &local_timer { diff --git a/arch/arm/boot/dts/rk3xxx.dtsi b/arch/arm/boot/dts/rk3xxx.dtsi index bf285091a9eb..cb4e42ede56a 100644 --- a/arch/arm/boot/dts/rk3xxx.dtsi +++ b/arch/arm/boot/dts/rk3xxx.dtsi @@ -76,6 +76,13 @@ reg = <0x1013c200 0x20>; interrupts = <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_EDGE_RISING)>; clocks = <&cru CORE_PERI>; + status = "disabled"; + /* The clock source and the sched_clock provided by the arm_global_timer + * on Rockchip rk3066a/rk3188 are quite unstable because their rates + * depend on the CPU frequency. + * Keep the arm_global_timer disabled in order to have the + * DW_APB_TIMER (rk3066a) or ROCKCHIP_TIMER (rk3188) selected by default. + */ }; local_timer: local-timer@1013c600 { |