ARM: dts: Add stmpe-adc DT node to Toradex iMX6 modules

Add the stmpe-adc DT node as found on Toradex iMX6 modules
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-apalis.dtsi

@@ -332,11 +332,17 @@ stmpe811@41 {
 		id = <0>;
 		blocks = <0x5>;
 		irq-trigger = <0x1>;
+		/* 3.25 MHz ADC clock speed */
+		st,adc-freq = <1>;
+		/* 12-bit ADC */
+		st,mod-12b = <1>;
+		/* internal ADC reference */
+		st,ref-sel = <0>;
+		/* ADC converstion time: 80 clocks */
+		st,sample-time = <4>;
 
 		stmpe_touchscreen {
 			compatible = "st,stmpe-ts";
-			/* 3.25 MHz ADC clock speed */
-			st,adc-freq = <1>;
 			/* 8 sample average control */
 			st,ave-ctrl = <3>;
 			/* 7 length fractional part in z */
@@ -346,17 +352,17 @@ stmpe_touchscreen {
 			 * current limit value
 			 */
 			st,i-drive = <1>;
-			/* 12-bit ADC */
-			st,mod-12b = <1>;
-			/* internal ADC reference */
-			st,ref-sel = <0>;
-			/* ADC converstion time: 80 clocks */
-			st,sample-time = <4>;
 			/* 1 ms panel driver settling time */
 			st,settling = <3>;
 			/* 5 ms touch detect interrupt delay */
 			st,touch-det-delay = <5>;
 		};
+
+		stmpe_adc {
+			compatible = "st,stmpe-adc";
+			/* forbid to use ADC channels 3-0 (touch) */
+			st,norequest-mask = <0x0F>;
+		};
 	};
 };
 

arch/arm/boot/dts/imx6qdl-colibri.dtsi

@@ -262,11 +262,17 @@ stmpe811@41 {
 		id = <0>;
 		blocks = <0x5>;
 		irq-trigger = <0x1>;
+		/* 3.25 MHz ADC clock speed */
+		st,adc-freq = <1>;
+		/* 12-bit ADC */
+		st,mod-12b = <1>;
+		/* internal ADC reference */
+		st,ref-sel = <0>;
+		/* ADC converstion time: 80 clocks */
+		st,sample-time = <4>;
 
 		stmpe_touchscreen {
 			compatible = "st,stmpe-ts";
-			/* 3.25 MHz ADC clock speed */
-			st,adc-freq = <1>;
 			/* 8 sample average control */
 			st,ave-ctrl = <3>;
 			/* 7 length fractional part in z */
@@ -276,17 +282,17 @@ stmpe_touchscreen {
 			 * current limit value
 			 */
 			st,i-drive = <1>;
-			/* 12-bit ADC */
-			st,mod-12b = <1>;
-			/* internal ADC reference */
-			st,ref-sel = <0>;
-			/* ADC converstion time: 80 clocks */
-			st,sample-time = <4>;
 			/* 1 ms panel driver settling time */
 			st,settling = <3>;
 			/* 5 ms touch detect interrupt delay */
 			st,touch-det-delay = <5>;
 		};
+
+		stmpe_adc {
+			compatible = "st,stmpe-adc";
+			/* forbid to use ADC channels 3-0 (touch) */
+			st,norequest-mask = <0x0F>;
+		};
 	};
 };