dt: Add a camera regulator node to all downstream Pi platforms

raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

The current firmware fixup of camera sensor overlays is not
particularly nice, and it stops you being able to load them
dynamically.
It's also incompatible with creating a simple DT that can be
loaded for both CAM1 and CAM0 on a CM as they would both
try to claim the one GPIO.

Almost all sensors have a hook of some form for a regulator, so
it's relatively straightforward to convert them all to use a
fixed regulator with GPIO control.

Add a fixed regulator node for each platform with the GPIO
correctly configured for the camera shutdown line. (The LED line
is ignored).
Signed-off-by: NDave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm/boot/dts/bcm2708-rpi-b-plus.dts

@@ -5,6 +5,7 @@
 #include "bcm283x-rpi-smsc9514.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,model-b-plus", "brcm,bcm2835";
@@ -111,6 +112,10 @@
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 41 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2708-rpi-b-rev1.dts

@@ -4,6 +4,7 @@
 #include "bcm2708-rpi.dtsi"
 #include "bcm283x-rpi-smsc9512.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,model-b", "brcm,bcm2835";
@@ -118,6 +119,10 @@ i2c_csi_dsi: &i2c1 {
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 27 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2708-rpi-b.dts

@@ -5,6 +5,7 @@
 #include "bcm283x-rpi-smsc9512.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,model-b", "brcm,bcm2835";
@@ -105,6 +106,10 @@
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 21 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2708-rpi-cm.dts

@@ -8,6 +8,21 @@
 / {
 	compatible = "raspberrypi,compute-module", "brcm,bcm2835";
 	model = "Raspberry Pi Compute Module";
+
+	cam1_reg: cam1_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "cam1-regulator";
+		gpio = <&gpio 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		status = "disabled";
+	};
+	cam0_reg: cam0_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "cam0-regulator";
+		gpio = <&gpio 30 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		status = "disabled";
+	};
 };
 
 &uart0 {

arch/arm/boot/dts/bcm2708-rpi-zero-w.dts

@@ -5,6 +5,7 @@
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
 #include "bcm2708-rpi-bt.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,model-zero-w", "brcm,bcm2835";
@@ -155,6 +156,10 @@
 	brcm,disable-headphones = <1>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 44 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2708-rpi-zero.dts

@@ -4,6 +4,7 @@
 #include "bcm2708-rpi.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,model-zero", "brcm,bcm2835";
@@ -109,6 +110,10 @@
 	brcm,disable-headphones = <1>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 41 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2709-rpi-2-b.dts

@@ -5,6 +5,7 @@
 #include "bcm283x-rpi-smsc9514.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
@@ -111,6 +112,10 @@
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 41 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2710-rpi-2-b.dts

@@ -5,6 +5,7 @@
 #include "bcm283x-rpi-smsc9514.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_28.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,2-model-b-rev2", "brcm,bcm2837";
@@ -111,6 +112,10 @@
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&gpio 41 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2710-rpi-3-b-plus.dts

@@ -6,6 +6,7 @@
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_44.dtsi"
 #include "bcm271x-rpi-bt.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
@@ -176,6 +177,10 @@
 	microchip,downshift-after = <2>;
 };
 
+&cam1_reg {
+	gpio = <&expgpio 5 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2710-rpi-3-b.dts

@@ -6,6 +6,7 @@
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_44.dtsi"
 #include "bcm271x-rpi-bt.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
@@ -185,6 +186,10 @@
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&expgpio 5 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2710-rpi-cm3.dts

@@ -8,6 +8,21 @@
 / {
 	compatible = "raspberrypi,3-compute-module", "brcm,bcm2837";
 	model = "Raspberry Pi Compute Module 3";
+
+	cam1_reg: cam1_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "cam1-regulator";
+		gpio = <&gpio 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		status = "disabled";
+	};
+	cam0_reg: cam0_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "cam0-regulator";
+		gpio = <&gpio 30 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		status = "disabled";
+	};
 };
 
 &uart0 {

arch/arm/boot/dts/bcm2711-rpi-4-b.dts

@@ -319,6 +319,7 @@
 #include "bcm2711-rpi.dtsi"
 #include "bcm283x-rpi-csi1-2lane.dtsi"
 #include "bcm283x-rpi-i2c0mux_0_44.dtsi"
+#include "bcm283x-rpi-cam1-regulator.dtsi"
 
 / {
 	chosen {
@@ -585,6 +586,10 @@
 	pinctrl-0 = <&audio_pins>;
 };
 
+&cam1_reg {
+	gpio = <&expgpio 5 GPIO_ACTIVE_HIGH>;
+};
+
 / {
 	__overrides__ {
 		act_led_gpio = <&act_led>,"gpios:4";

arch/arm/boot/dts/bcm2711-rpi-cm4.dts

@@ -327,6 +327,14 @@
 	};
 
 	/delete-node/ wifi-pwrseq;
+
+	cam0_reg: cam1_reg: cam1_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "cam1-reg";
+		gpio = <&expgpio 5 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		status = "disabled";
+	};
 };
 
 &mmcnr {

arch/arm/boot/dts/bcm283x-rpi-cam1-regulator.dtsi

+// SPDX-License-Identifier: GPL-2.0
+
+/ {
+	cam1_reg: cam1_reg {
+		compatible = "regulator-fixed";
+		regulator-name = "cam1-reg";
+		enable-active-high;
+		status = "disabled";
+	};
+};