linux-kernel - [PATCH 1/3] arm64: dts: rockchip: Add RTC on rk3576-evb1-v10

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Message-Id: <20250813-evb1-rtcwifibt-v1-1-d13c83422971@gmail.com>
Date: Wed, 13 Aug 2025 00:30:23 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Pavel Zhovner <pavel@...pperdevices.com>, 
 Alexey Charkov <alchark@...il.com>
Subject: [PATCH 1/3] 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@...pperdevices.com>
Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 arch/arm64/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 56527c56830e3fd81855652f7bcc31215c771c0a..bfefd37a1ab8c67a17aba0cdb80980102d66bb76 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 @@ regulator-state-mem {
 	};
 };
 
+&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 @@ &pcie1 {
 };
 
 &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>;

-- 
2.49.1