From eff044d4ca10d226ebb4818e3661bb343a2b218c Mon Sep 17 00:00:00 2001
From: Alexey Charkov <alchark@gmail.com>
Date: Wed, 13 Aug 2025 00:30:23 +0400
Subject: [PATCH] arm64: dts: rockchip: Add RTC on rk3576-evb1-v10

[ Upstream commit 0adaae77862932a19cc14c086d7fd15ec0ef7703 ]

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>
Stable-dep-of: 843367c7ed19 ("arm64: dts: rockchip: Fix network on rk3576 evb1 board")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../boot/dts/rockchip/rk3576-evb1-v10.dts     | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
index 56527c56830e..bfefd37a1ab8 100644
--- 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>;