Re: [PATCH v3 02/21] arm64: dts: qcom: msm8939: correct sleep clock frequency

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On 24/12/2024 10:17, Dmitry Baryshkov wrote:
The MSM8939 platform uses PM8916 to provide sleep clock. According to the
documentation, that clock has 32.7645 kHz frequency. Correct the sleep
clock definition.

Fixes: 61550c6c156c ("arm64: dts: qcom: Add msm8939 SoC")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
  arch/arm64/boot/dts/qcom/msm8939.dtsi | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8939.dtsi b/arch/arm64/boot/dts/qcom/msm8939.dtsi
index 7a6f1eeaa3fc438f7b6c1d3b2dd17fb1b6f81d9a..7cd5660de1b33def5b9dc8a0d02583c3eaffb17f 100644
--- a/arch/arm64/boot/dts/qcom/msm8939.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8939.dtsi
@@ -34,7 +34,7 @@ xo_board: xo-board {
  		sleep_clk: sleep-clk {
  			compatible = "fixed-clock";
  			#clock-cells = <0>;
-			clock-frequency = <32768>;
+			clock-frequency = <32764>;
  		};
  	};

Here's a quote from "MSM8936/MSM8939 Clock Plan"
Section 2.1:

"The chip does not have a separate sleep crystal. The sleep clock, whose oscillation frequency is 32.768 kHz, used as the source for timetick is generated from XO using a divisor of 586."

---
bod




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