[PATCH 1/3] ARM: dts: imx6: rdu2: Add node for UCS1002 USB charger chip

[Andrey Smirnov]

Add node for UCS1002 USB charger chip connected to front panel USB and
replace "regulator-fixed" previously used to control VBUS.

Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Chris Healy <cphealy@xxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---

Changes since [v1]:

    - Added GPIO hog configuration to put UCS1002 into correct mode
      even before its driver takes over. The code for that is taken
      from similar patch from Lucas, so I added his Signed-off-by as
      well.

[v1] lore.kernel.org/r/20190522071227.31488-1-andrew.smirnov@xxxxxxxxx

 arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi | 77 +++++++++++++++++++------
 1 file changed, 59 insertions(+), 18 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
index 93be00a60c88..07e21d1e5b4c 100644
--- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
@@ -60,18 +60,6 @@
 		regulator-always-on;
 	};
 
-	reg_5p0v_user_usb: regulator-5p0v-user-usb {
-		compatible = "regulator-fixed";
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_reg_user_usb>;
-		vin-supply = <&reg_5p0v_main>;
-		regulator-name = "5V_USER_USB";
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-		gpio = <&gpio3 22 GPIO_ACTIVE_LOW>;
-		startup-delay-us = <1000>;
-	};
-
 	reg_3p3v_pmic: regulator-3p3v-pmic {
 		compatible = "regulator-fixed";
 		vin-supply = <&reg_12p0v>;
@@ -331,6 +319,39 @@
 	};
 };
 
+&gpio3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio3_hog>;
+
+	usb-emulation {
+		gpio-hog;
+		gpios = <19 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "usb-emulation";
+	};
+
+	usb-mode1 {
+		gpio-hog;
+		gpios = <20 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "usb-mode1";
+	};
+
+	usb-pwr {
+		gpio-hog;
+		gpios = <22 GPIO_ACTIVE_LOW>;
+		output-high;
+		line-name = "usb-pwr-ctrl-en-n";
+	};
+
+	usb-mode2 {
+		gpio-hog;
+		gpios = <23 GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "usb-mode2";
+	};
+};
+
 &i2c1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_i2c1>;
@@ -590,6 +611,16 @@
 		status = "disabled";
 	};
 
+	reg_5p0v_user_usb: charger@32 {
+		compatible = "microchip,ucs1002";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_ucs1002_pins>;
+		reg = <0x32>;
+		interrupts-extended = <&gpio5 2 IRQ_TYPE_EDGE_BOTH>,
+				      <&gpio3 21 IRQ_TYPE_EDGE_BOTH>;
+		interrupt-names = "a_det", "alert";
+	};
+
 	hpa1: amp@60 {
 		compatible = "ti,tpa6130a2";
 		pinctrl-names = "default";
@@ -935,6 +966,15 @@
 		>;
 	};
 
+	pinctrl_gpio3_hog: gpio3hoggrp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_D19__GPIO3_IO19		0x1b0b0
+			MX6QDL_PAD_EIM_D20__GPIO3_IO20		0x1b0b0
+			MX6QDL_PAD_EIM_D22__GPIO3_IO22		0x1b0b0
+			MX6QDL_PAD_EIM_D23__GPIO3_IO23		0x1b0b0
+		>;
+	};
+
 	pinctrl_i2c1: i2c1grp {
 		fsl,pins = <
 			MX6QDL_PAD_CSI0_DAT8__I2C1_SDA		0x4001b8b1
@@ -982,12 +1022,6 @@
 		>;
 	};
 
-	pinctrl_reg_user_usb: usbotggrp {
-		fsl,pins = <
-			MX6QDL_PAD_EIM_D22__GPIO3_IO22		0x40000038
-		>;
-	};
-
 	pinctrl_rmii_phy_irq: phygrp {
 		fsl,pins = <
 			MX6QDL_PAD_EIM_D30__GPIO3_IO30		0x40010000
@@ -1047,6 +1081,13 @@
 		>;
 	};
 
+	pinctrl_ucs1002_pins: ucs1002grp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_A25__GPIO5_IO02  	0x1b0b0
+			MX6QDL_PAD_EIM_D21__GPIO3_IO21  	0x1b0b0
+		>;
+	};
+
 	pinctrl_usdhc2: usdhc2grp {
 		fsl,pins = <
 			MX6QDL_PAD_SD2_CMD__SD2_CMD		0x10059
-- 
2.21.0