Add ADS7846 touchscreen support.
Signed-off-by: Dmitry Lifshitz <lifsh...@compulab.co.il>
---
arch/arm/boot/dts/omap3-cm-t3x.dtsi | 57 +++++++++++++++++++++++++++++++++++
1 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/dts/omap3-cm-t3x.dtsi
b/arch/arm/boot/dts/omap3-cm-t3x.dtsi
index e4c0c56..3636fed 100644
--- a/arch/arm/boot/dts/omap3-cm-t3x.dtsi
+++ b/arch/arm/boot/dts/omap3-cm-t3x.dtsi
@@ -49,6 +49,13 @@
compatible = "usb-nop-xceiv";
vcc-supply = <&hsusb2_power>;
};
+
+ ads7846reg: ads7846-reg {
+ compatible = "regulator-fixed";
+ regulator-name = "ads7846-reg";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ };
};
&omap3_pmx_core {
@@ -115,6 +122,21 @@
OMAP3_CORE1_IOPAD(0x20e6, PIN_OUTPUT | MUX_MODE0)
/* dss_data5.dss_data5 */
>;
};
+
+ ads7846_pins: pinmux_ads7846_pins {
+ pinctrl-single,pins = <
+ OMAP3_CORE1_IOPAD(0x20ba, PIN_INPUT_PULLUP | MUX_MODE4)
/* gpmc_ncs6.gpio_57 */
+ >;
+ };
+
+ mcspi1_pins: pinmux_mcspi1_pins {
+ pinctrl-single,pins = <
+ OMAP3_CORE1_IOPAD(0x21c8, PIN_INPUT | MUX_MODE0)
/* mcspi1_clk */
+ OMAP3_CORE1_IOPAD(0x21ca, PIN_INPUT | MUX_MODE0)
/* mcspi1_simo */
+ OMAP3_CORE1_IOPAD(0x21cc, PIN_INPUT | MUX_MODE0)
/* mcspi1_somi */
+ OMAP3_CORE1_IOPAD(0x21ce, PIN_INPUT_PULLDOWN |
MUX_MODE0) /* mcspi1_cs0 */
+ >;
+ };
};
&uart3 {
@@ -147,3 +169,38 @@
&usbhsehci {
phys = <&hsusb1_phy &hsusb2_phy>;
};
+
+&mcspi1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcspi1_pins>;
+
+ /* touch controller */
+ ads7846@0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&ads7846_pins>;
+
+ compatible = "ti,ads7846";
+ vcc-supply = <&ads7846reg>;
+
+ reg = <0>; /* CS0 */
+ spi-max-frequency = <1500000>;
+
+ interrupt-parent = <&gpio2>;
+ interrupts = <25 0>; /* gpio_57 */
+ pendown-gpio = <&gpio2 25 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;
+ };
+};
--
1.7.5.4
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