ARM: pxa: raumfeld-controller: add pinctrl for charger pins

The PEN2 line needs to be pulled up for the charger to enter high-current
mode. Do this with a static pull on the GPIO.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

arch/arm/boot/dts/pxa300-raumfeld-controller.dts

@@ -41,6 +41,8 @@ w1_ds2760: slave-ds2760 {
 	};
 
 	charger: charger {
+		pinctrl-names = "default";
+		pinctrl-0 = <&charger_pins>;
 		compatible = "gpio-charger";
 		charger-type = "mains";
 		gpios = <&gpio 101 GPIO_ACTIVE_LOW>;
@@ -237,6 +239,14 @@ MFP_PIN_PXA300(105) MFP_AF0	/* PWM	*/
 		pinctrl-single,low-power-mode = MFP_LPM(MFP_LPM_FLOAT);
 	};
 
+	charger_pins: charger_pins {
+		pinctrl-single,pins = <
+			MFP_PIN_PXA300(31) MFP_AF0	/* PEN2	*/
+		>;
+		pinctrl-single,low-power-mode = MFP_LPM(MFP_LPM_PULL_HIGH);
+		pinctrl-single,bias-pullup = MPF_PULL_UP;
+	};
+
 	dock_detect_pins: dock_detect_pins {
 		pinctrl-single,pins = <
 			MFP_PIN_PXA300(116) MFP_AF0	/* DOCK_DETECT	*/