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Mon, 04 Dec 2023 01:56:25 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1784344778301900662 X-GMAIL-MSGID: 1784344778301900662 Looks like not all firmware versions used for MSM8939 program the timer frequency for both broadcast/MMIO timers, causing a WARNING at runtime: WARNING: CPU: 0 PID: 0 at kernel/time/clockevents.c:38 cev_delta2ns+0x74/0x90 pc : cev_delta2ns+0x74/0x90 lr : clockevents_config.part.0+0x64/0x8c Call trace: cev_delta2ns+0x74/0x90 clockevents_config_and_register+0x20/0x34 arch_timer_mem_of_init+0x374/0x534 timer_probe+0x88/0x110 time_init+0x14/0x4c start_kernel+0x2c0/0x640 Unfortunately there is no way to fix the firmware on most of these devices since it's proprietary and signed. As a workaround, specify the clock-frequency explicitly in the DT to fix the warning. Fixes: 61550c6c156c ("arm64: dts: qcom: Add msm8939 SoC") Reported-by: Vincent Knecht Signed-off-by: Stephan Gerhold Reviewed-by: Konrad Dybcio --- arch/arm64/boot/dts/qcom/msm8939.dtsi | 2 ++ 1 file changed, 2 insertions(+) --- base-commit: adcad44bd1c73a5264bff525e334e2f6fc01bb9b change-id: 20231204-msm8939-timer-c8c218aa2440 Best regards, diff --git a/arch/arm64/boot/dts/qcom/msm8939.dtsi b/arch/arm64/boot/dts/qcom/msm8939.dtsi index 95610a32750a..4ba115eecfd5 100644 --- a/arch/arm64/boot/dts/qcom/msm8939.dtsi +++ b/arch/arm64/boot/dts/qcom/msm8939.dtsi @@ -2195,6 +2195,8 @@ timer@b120000 { #address-cells = <1>; #size-cells = <1>; ranges; + /* Necessary because firmware does not configure this correctly */ + clock-frequency = <19200000>; frame@b121000 { reg = <0x0b121000 0x1000>,