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arm64: dts: rockchip: Add 32k clk on rk3399-gru

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This adds the 32k clock to the RK3399 Gru board file, which is provided
by a Silego oscillator on Gru boards.

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@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
[moved clock position and adapted commit message a bit]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Derek Basehore
2018-11-27 15:23:31 -08:00
committed by Heiko Stuebner
parent cdd46460fe
commit 17222eb932
1 changed files with 7 additions and 0 deletions
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7
arch/arm64/boot/dts/rockchip/rk3399-gru.dtsi
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@@ -262,6 +262,13 @@ pp3300_trackpad: pp3300-trackpad {
pp5000_usb_a_vbus: pp5000 {
};
ap_rtc_clk: ap-rtc-clk {
compatible = "fixed-clock";
clock-frequency = <32768>;
clock-output-names = "xin32k";
#clock-cells = <0>;
};
gpio_keys: gpio-keys {
compatible = "gpio-keys";
pinctrl-names = "default";