arm64: dts: rockchip: Add RTC on rk3576-evb1-v10

Add the I2C connected RTC chip to the Rockchip RK3576 EVB1 board.

Apart from the realtime clock functionality, it also provides a 32 kHz
clock source for the onboard WiFi chip.

Tested-by: Pavel Zhovner <pavel@flipperdevices.com>
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Link: https://lore.kernel.org/r/20250813-evb1-rtcwifibt-v1-1-d13c83422971@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
index a60dee0de9f9966f985306bb767ba041a7f696df..b756aba9328b0a3010082ead61013f2e43766a1d 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
@@ -680,6 +680,22 @@
        };
 };
 
+&i2c2 {
+       status = "okay";
+
+       hym8563: rtc@51 {
+               compatible = "haoyu,hym8563";
+               reg = <0x51>;
+               clock-output-names = "hym8563";
+               interrupt-parent = <&gpio0>;
+               interrupts = <RK_PA0 IRQ_TYPE_LEVEL_LOW>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&rtc_int>;
+               wakeup-source;
+               #clock-cells = <0>;
+       };
+};
+
 &mdio0 {
        rgmii_phy0: phy@1 {
                compatible = "ethernet-phy-ieee802.3-c22";
@@ -708,6 +724,12 @@
 };
 
 &pinctrl {
+       hym8563 {
+               rtc_int: rtc-int {
+                       rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_up>;
+               };
+       };
+
        usb {
                usb_host_pwren: usb-host-pwren {
                        rockchip,pins = <0 RK_PC7 RK_FUNC_GPIO &pcfg_pull_none>;