arm64: dts: qcom: msm8939: Add clock-frequency for broadcast timer

Browse source

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: 61550c6c15 ("arm64: dts: qcom: Add msm8939 SoC")
Reported-by: Vincent Knecht <vincent.knecht@mailoo.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20231204-msm8939-timer-v1-1-a2486c625786@gerhold.net
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

...

This commit is contained in:

Stephan Gerhold 2023-12-04 10:55:53 +01:00 • committed by Bjorn Andersson

parent cc1ec484f2

commit 12844ac08c

1 changed files with 2 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

arch/arm64/boot/dts/qcom/msm8939.dtsi

View file