[PATCH 2/4] arm64: dts: rockchip: add overlay for qnap-ts433 device revision

[Heiko Stuebner <heiko@sntech.de>]

TS433 devices received a board revision adding gpios for per hard-disk
presence-detection and power-control. These board have a PCB-id of at
least 12 (mainboard) and 10 (backplane), which can be read from an EEPROM.

The presence detection is not really necessary and there are also no
existing bindings for doing something with it. So add them as gpio hogs
to at least document them and allow their state to be read from debugfs.

The power-control is modelled as regulators, with the hdd1+hdd2 variants
connected to the RK3568's SATA controllers as target-supplies. The
JMicron AHCI controller on PCIe didn't have bindings for that, I could
find, so they get an always-on state for now.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
 arch/arm64/boot/dts/rockchip/Makefile         |   5 +
 .../rockchip/rk3568-qnap-ts433-pcb-12-10.dtso | 151 ++++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3568-qnap-ts433-pcb-12-10.dtso

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index d0f22d3a3bb4..aafffecfb2ef 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -145,6 +145,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-odroid-m1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-photonicat.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-qnap-ts233.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-qnap-ts433.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-qnap-ts433-pcb-12-10.dtbo
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-radxa-e25.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-roc-pc.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-rock-3a.dtb
@@ -245,6 +246,10 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rockpro64-v2-screen.dtb
 rk3399-rockpro64-v2-screen-dtbs := rk3399-rockpro64-v2.dtb \
 	rk3399-rockpro64-screen.dtbo
 
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-qnap-ts433-pcb-12-10.dtb
+rk3568-qnap-ts433-pcb-12-10-dtbs := rk3568-qnap-ts433.dtb \
+	rk3568-qnap-ts433-pcb-12-10.dtbo
+
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-wolfvision-pf5-vz-2-uhd.dtb
 rk3568-wolfvision-pf5-vz-2-uhd-dtbs := rk3568-wolfvision-pf5.dtb \
 	rk3568-wolfvision-pf5-display-vz.dtbo \
diff --git a/arch/arm64/boot/dts/rockchip/rk3568-qnap-ts433-pcb-12-10.dtso b/arch/arm64/boot/dts/rockchip/rk3568-qnap-ts433-pcb-12-10.dtso
new file mode 100644
index 000000000000..ce0fdc9f2989
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3568-qnap-ts433-pcb-12-10.dtso
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
+/*
+ * Device tree overlay for TS433 board PCBs-12-10 revision.
+ *
+ * Copyright (C) 2025 Heiko Stuebner <heiko@sntech.de>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+
+&{/} {
+	/*
+	 * The default hardware-state of this gpio causes the drive
+	 * to be already running when entering the kernel.
+	 * regulator-boot-on is needed to prevent one additional
+	 * power-cycle on the drive.
+	 *
+	 * With regulator-boot-on we get the expected 1 cycle
+	 * per boot, without it we end up with 2 cycles as seen
+	 * via smartctl.
+	 */
+	hdd1_pwr: regulator-hdd1-power {
+		compatible = "regulator-fixed";
+		gpio = <&gpio0 RK_PC2 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdd1_power_pin>;
+		regulator-name = "hdd1-power";
+		regulator-boot-on;
+		vin-supply = <&dc_12v>;
+	};
+
+	hdd2_pwr: regulator-hdd2-power {
+		compatible = "regulator-fixed";
+		gpio = <&gpio0 RK_PC3 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdd2_power_pin>;
+		regulator-name = "hdd2-power";
+		regulator-boot-on;
+		vin-supply = <&dc_12v>;
+	};
+
+	/*
+	 * HDD3+4 are connected to ports of the PCIe SATA controller.
+	 * Currently there is no way to attach those, so keep them
+	 * always on.
+	 */
+	hdd3_pwr: regulator-hdd3-power {
+		compatible = "regulator-fixed";
+		gpio = <&gpio0 RK_PC4 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdd3_power_pin>;
+		regulator-name = "hdd3-power";
+		regulator-always-on;
+		regulator-boot-on;
+		vin-supply = <&dc_12v>;
+	};
+
+	hdd4_pwr: regulator-hdd4-power {
+		compatible = "regulator-fixed";
+		gpio = <&gpio0 RK_PC5 GPIO_ACTIVE_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdd4_power_pin>;
+		regulator-name = "hdd4-power";
+		regulator-always-on;
+		regulator-boot-on;
+		vin-supply = <&dc_12v>;
+	};
+};
+
+&gpio2 {
+	hdd1-present-hog {
+		gpios = <RK_PA2 GPIO_ACTIVE_LOW>;
+		gpio-hog;
+		input;
+		line-name = "hdd1-present";
+	};
+
+	hdd2-present-hog {
+		gpios = <RK_PA1 GPIO_ACTIVE_LOW>;
+		gpio-hog;
+		input;
+		line-name = "hdd2-present";
+	};
+
+	hdd3-present-hog {
+		gpios = <RK_PD0 GPIO_ACTIVE_LOW>;
+		gpio-hog;
+		input;
+		line-name = "hdd3-present";
+	};
+
+	hdd4-present-hog {
+		gpios = <RK_PD1 GPIO_ACTIVE_LOW>;
+		gpio-hog;
+		input;
+		line-name = "hdd4-present";
+	};
+};
+
+&pinctrl {
+	pinctrl-names = "default";
+	pinctrl-0 = <&hdd1_present_pin &hdd2_present_pin &hdd3_present_pin
+		     &hdd4_present_pin>;
+
+	hdd-power {
+		hdd1_power_pin: hdd1-power-pin {
+			rockchip,pins = <0 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		hdd2_power_pin: hdd2-power-pin {
+			rockchip,pins = <0 RK_PC3 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		hdd3_power_pin: hdd3-power-pin {
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		hdd4_power_pin: hdd4-power-pin {
+			rockchip,pins = <0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	hdd-present {
+		hdd1_present_pin: hdd1-present-pin {
+			rockchip,pins = <2 RK_PA2 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		hdd2_present_pin: hdd2-present-pin {
+			rockchip,pins = <2 RK_PA1 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		hdd3_present_pin: hdd3-present-pin {
+			rockchip,pins = <2 RK_PD0 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		hdd4_present_pin: hdd4-present-pin {
+			rockchip,pins = <2 RK_PD1 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+};
+
+&sata1_port0 {
+	target-supply = <&hdd2_pwr>;
+};
+
+&sata2_port0 {
+	target-supply = <&hdd1_pwr>;
+};
-- 
2.47.2