On some rk3399 boards GPIO0_A0 is hooked up to a 32 kHz clock.  This can
be used as the source for various clocks in the system.

Add a pinmux so boards can get this pin properly configured.

Signed-off-by: Douglas Anderson <diand...@chromium.org>
---
 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi 
b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 62d450935a57..13e2a440fe43 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -1171,6 +1171,12 @@
                        drive-strength = <13>;
                };
 
+               clock {
+                       clk_32k: clk-32k {
+                               rockchip,pins = <0 0 RK_FUNC_2 &pcfg_pull_none>;
+                       };
+               };
+
                i2c0 {
                        i2c0_xfer: i2c0-xfer {
                                rockchip,pins =
-- 
2.8.0.rc3.226.g39d4020

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