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ARM: dts: sun8i: reference-design-tablet: Add gsl1680 touchscreen node

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Almost all sun8i tablets use a gsl1680 touchscreen controller, so add
a node describing it to reference-design-tablet.dtsi.

Almost all, but not all, so mark it as disabled by default (dts files
will also need to supply a firmware-name and resolution info).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Hans de Goede 2016-08-08 21:43:13 +02:00 committed by Maxime Ripard
parent 835dbe8ffa
commit e8552107ae
1 changed files with 28 additions and 0 deletions
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28
arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi
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@ -63,6 +63,27 @@ chosen {
};
};
&i2c0 {
/*
* The gsl1680 is rated at 400KHz and it will not work reliable at
* 100KHz, this has been confirmed on multiple different q8 tablets.
* The gsl1680 is the only device on this bus.
*/
clock-frequency = <400000>;
gsl1680: touchscreen@40 {
compatible = "silead,gsl1680";
reg = <0x40>;
interrupt-parent = <&pio>;
interrupts = <1 5 IRQ_TYPE_EDGE_FALLING>; /* PB5 */
pinctrl-names = "default";
pinctrl-0 = <&ts_power_pin>;
power-gpios = <&pio 7 1 GPIO_ACTIVE_HIGH>; /* PH1 */
/* Most tablets use this touchscreen, but not all */
status = "disabled";
};
};
&mmc0 {
pinctrl-names = "default";
pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin>;
@ -88,6 +109,13 @@ mmc0_cd_pin: mmc0_cd_pin@0 {
allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
};
ts_power_pin: ts_power_pin@0 {
allwinner,pins = "PH1";
allwinner,function = "gpio_out";
allwinner,drive = <SUN4I_PINCTRL_10_MA>;
allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
};
usb0_id_detect_pin: usb0_id_detect_pin@0 {
allwinner,pins = "PH8";
allwinner,function = "gpio_in";