This adds the 32k clock to the RK3399 Gru board file. Even though it's
not directly used, muxes will end up traversing the entire clk tree on
calls to determine_rate if it doesn't exist. This is because the 32k
clk is listed as a possible parent on some clks. Since the clk doesn't
know about the 32k clk (it was never registered), it triggers a global
search for it. This can happen about 40 times per second, which isn't
great for power.
Signed-off-by: Derek Basehore <dbasehore@xxxxxxxxxxxx>
---
arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
index ca07f6032200..a07aa4c570c0 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
@@ -14,6 +14,13 @@
stdout-path = "serial2:115200n8";
};
+ ap_rtc_clk: ap-rtc-clk {
+ compatible = "fixed-clock";
+ clock-frequency = <32768>;
+ clock-output-names = "xin32k";
+ #clock-cells = <0>;
+ };
+
/*
* Power Tree
*
--
2.20.0.rc0.387.gc7a69e6b6c-goog
