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authorGravatar Arnd Bergmann <arnd@arndb.de> 2022-11-24 15:36:13 +0100
committerGravatar Arnd Bergmann <arnd@arndb.de> 2022-11-24 15:36:13 +0100
commitb10dbd6fbd7d097afa1ffa5f94a74b355a4e4743 (patch)
treef0aac02c0333f87a632ec4d9516b54ec34c8342b
parentMerge tag 'v6.1-rockchip-dtsfixes1' of git://git.kernel.org/pub/scm/linux/ker... (diff)
parentARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188 (diff)
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Merge tag 'v6.2-rockchip-dts32-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into arm/fixes
Disabling of the unreliable arm-global-timer on earliest Rockchip SoCs, due to its frequency being bound to the changing cpu clock. * tag 'v6.2-rockchip-dts32-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip: ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188
-rw-r--r--arch/arm/boot/dts/rk3188.dtsi1
-rw-r--r--arch/arm/boot/dts/rk3xxx.dtsi7
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/rk3188.dtsi b/arch/arm/boot/dts/rk3188.dtsi
index b8f34bef0efa..44b54af0bbf9 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 {