diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2016-08-08 21:43:13 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@free-electrons.com> | 2016-08-22 20:34:54 +0200 |
| commit | e8552107ae5845dd1d281cddca026ef0e4d30c80 (patch) | |
| tree | dc0814837d1e48ba83c46a8e9f9090d284a22b98 /arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi | |
| parent | 835dbe8ffafa45907495811cb2f3a57b2cccfa27 (diff) | |
ARM: dts: sun8i: reference-design-tablet: Add gsl1680 touchscreen node
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>
Diffstat (limited to 'arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi')
| -rw-r--r-- | arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi index 9d9036140511..f29897c40ae8 100644 --- a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi +++ b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi @@ -63,6 +63,27 @@ }; }; +&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 @@ 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"; |