[PATCH] arm64: dts: rockchip: Fix i2c6 clock-frequency on NanoPC-T6

[Diederik de Haas <diederik@cknow-tech.com>]

The i2c6 bus needs to run at 200kHz, because at the default frequency of
100kHz it may fail to find the RTC resulting in warnings/errors like

  rtc-hym8563 6-0051: no valid clock/calendar values available
  rtc-hym8563 6-0051: hctosys: unable to read the hardware clock

But only sometimes. This should not happen when there is a battery backing
the RTC, yet it does ... sometimes.

Signed-off-by: Diederik de Haas <diederik@cknow-tech.com>
---
 arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
index 4d97afbc33bf..ff4f766ce0df 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-nanopc-t6.dtsi
@@ -455,6 +455,8 @@ regulator-state-mem {
 };
 
 &i2c6 {
+	clock-frequency = <200000>;
+
 	status = "okay";
 
 	usbc0: usb-typec@22 {
-- 
2.55.0