Add ADS7846 touchscreen support.
Signed-off-by: Dmitry Lifshitz <lifshitz@xxxxxxxxxxxxxx>
Acked-by: Igor Grinberg <grinberg@xxxxxxxxxxxxxx>
---
arch/arm/boot/dts/am57xx-cl-som-am57x.dts | 44 +++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/arch/arm/boot/dts/am57xx-cl-som-am57x.dts b/arch/arm/boot/dts/am57xx-cl-som-am57x.dts
index eba12a4..1830d4f 100644
--- a/arch/arm/boot/dts/am57xx-cl-som-am57x.dts
+++ b/arch/arm/boot/dts/am57xx-cl-som-am57x.dts
@@ -43,6 +43,13 @@
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
+
+ ads7846reg: fixedregulator-ads7846-reg {
+ compatible = "regulator-fixed";
+ regulator-name = "ads7846-reg";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
};
&dra7_pmx_core {
@@ -183,6 +190,12 @@
DRA7XX_CORE_IOPAD(0x3640, PIN_INPUT | MUX_MODE15)
>;
};
+
+ ads7846_pins: pinmux_ads7846_pins {
+ pinctrl-single,pins = <
+ DRA7XX_CORE_IOPAD(0x3464, PIN_INPUT_PULLDOWN | MUX_MODE14) /* gpmc_a9.gpio1_31 */
+ >;
+ };
};
&i2c1 {
@@ -450,6 +463,37 @@
reg = <0x100000 0x0>;
};
};
+
+ /* touch controller */
+ ads7846@0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&ads7846_pins>;
+
+ compatible = "ti,ads7846";
+ vcc-supply = <&ads7846reg>;
+
+ reg = <1>; /* CS1 */
+ spi-max-frequency = <1500000>;
+
+ interrupt-parent = <&gpio1>;
+ interrupts = <31 0>;
+ pendown-gpio = <&gpio1 31 0>;
+
+
+ ti,x-min = /bits/ 16 <0x0>;
+ ti,x-max = /bits/ 16 <0x0fff>;
+ ti,y-min = /bits/ 16 <0x0>;
+ ti,y-max = /bits/ 16 <0x0fff>;
+
+ ti,x-plate-ohms = /bits/ 16 <180>;
+ ti,pressure-max = /bits/ 16 <255>;
+
+ ti,debounce-max = /bits/ 16 <30>;
+ ti,debounce-tol = /bits/ 16 <10>;
+ ti,debounce-rep = /bits/ 16 <1>;
+
+ linux,wakeup;
+ };
};
&mac {
--
1.9.1
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