From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Subject: [PATCH 3/8] ARM: dts: sun8i: reference-design-tablet: Add gsl1680 touchscreen node Date: Mon, 8 Aug 2016 21:43:13 +0200 Message-ID: <1470685398-14568-3-git-send-email-hdegoede@redhat.com> References: <1470685398-14568-1-git-send-email-hdegoede@redhat.com> Return-path: In-Reply-To: <1470685398-14568-1-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Chen-Yu Tsai , Maxime Ripard Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree , Hans de Goede List-Id: devicetree@vger.kernel.org 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 --- .../boot/dts/sun8i-reference-design-tablet.dtsi | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi b/arch/arm/boot/dts/sun8i-reference-design-tablet.dtsi index 9d90361..f29897c 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 = ; }; + ts_power_pin: ts_power_pin@0 { + allwinner,pins = "PH1"; + allwinner,function = "gpio_out"; + allwinner,drive = ; + allwinner,pull = ; + }; + usb0_id_detect_pin: usb0_id_detect_pin@0 { allwinner,pins = "PH8"; allwinner,function = "gpio_in"; -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html