ARM: dts: apq8064: add i2c sleep pinctrl states.

This patch adds missing i2c pinctrl sleep states.
Also add 16mA drive strength to the pins so that we can detect wide
range of i2c devices on the other side of level shifters.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm/boot/dts/qcom-apq8064-pins.dtsi

@@ -19,6 +19,24 @@ mux {
 			pins = "gpio20", "gpio21";
 			function = "gsbi1";
 		};
+
+		pinconf {
+			pins = "gpio20", "gpio21";
+			drive-strength = <16>;
+			bias-disable;
+		};
+	};
+
+	i2c1_pins_sleep: i2c1_pins_sleep {
+		mux {
+			pins = "gpio20", "gpio21";
+			function = "gpio";
+		};
+		pinconf {
+			pins = "gpio20", "gpio21";
+			drive-strength = <2>;
+			bias-disable = <0>;
+		};
 	};
 
 	i2c3_pins: i2c3 {
@@ -26,6 +44,24 @@ mux {
 			pins = "gpio8", "gpio9";
 			function = "gsbi3";
 		};
+
+		pinconf {
+			pins = "gpio8", "gpio9";
+			drive-strength = <16>;
+			bias-disable;
+		};
+	};
+
+	i2c3_pins_sleep: i2c3_pins_sleep {
+		mux {
+			pins = "gpio8", "gpio9";
+			function = "gpio";
+		};
+		pinconf {
+			pins = "gpio8", "gpio9";
+			drive-strength = <2>;
+			bias-disable = <0>;
+		};
 	};
 
 	gsbi6_uart_2pins: gsbi6_uart_2pins {

arch/arm/boot/dts/qcom-apq8064.dtsi

@@ -227,8 +227,8 @@ gsbi1: gsbi@12440000 {
 
 			gsbi1_i2c: i2c@12460000 {
 				compatible = "qcom,i2c-qup-v1.1.1";
-				pinctrl-0 = <&i2c1_pins>;
-				pinctrl-names = "default";
+				pinctrl-0 = <&i2c1_pins &i2c1_pins_sleep>;
+				pinctrl-names = "default", "sleep";
 				reg = <0x12460000 0x1000>;
 				interrupts = <0 194 IRQ_TYPE_NONE>;
 				clocks = <&gcc GSBI1_QUP_CLK>, <&gcc GSBI1_H_CLK>;
@@ -274,8 +274,8 @@ gsbi3: gsbi@16200000 {
 			ranges;
 			gsbi3_i2c: i2c@16280000 {
 				compatible = "qcom,i2c-qup-v1.1.1";
-				pinctrl-0 = <&i2c3_pins>;
-				pinctrl-names = "default";
+				pinctrl-0 = <&i2c3_pins &i2c3_pins_sleep>;
+				pinctrl-names = "default", "sleep";
 				reg = <0x16280000 0x1000>;
 				interrupts = <GIC_SPI 151 IRQ_TYPE_NONE>;
 				clocks = <&gcc GSBI3_QUP_CLK>,