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arm64: dts: mediatek: asurada: Add I2C touchscreen 

All machines of the Asurada platform have a touchscreen at address 0x10
in the I2C0 bus, but the devices vary: Spherion has the Elan eKTH3500
touchscreen, while Hayato has a generic HID-over-i2c touchscreen.

Add common support for the touchscreens on the platform and the
specifics in each board file.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220629155956.1138955-12-nfraprado@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Nícolas F. R. A. Prado 2022-06-29 11:59:48 -04:00 committed by Matthias Brugger
parent e031715a70
commit cbd4af081a
3 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dts
View File

@ -38,3 +38,10 @@
CROS_STD_MAIN_KEYMAP
>;
};
&touchscreen {
compatible = "hid-over-i2c";
post-power-on-delay-ms = <10>;
hid-descr-addr = <0x0001>;
vdd-supply = <&pp3300_u>;
};

4
arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
View File

@ -40,3 +40,7 @@
CROS_STD_MAIN_KEYMAP
>;
};
&touchscreen {
compatible = "elan,ekth3500";
};

25
arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
View File

@ -92,6 +92,13 @@
clock-frequency = <400000>;
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;
touchscreen: touchscreen@10 {
reg = <0x10>;
interrupts-extended = <&pio 21 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&touchscreen_pins>;
};
};
&i2c1 {
@ -454,6 +461,24 @@
bias-pull-up = <MTK_PUPD_SET_R1R0_11>;
};
};
touchscreen_pins: touchscreen-default-pins {
pins-irq {
pinmux = <PINMUX_GPIO21__FUNC_GPIO21>;
input-enable;
bias-pull-up;
};
pins-reset {
pinmux = <PINMUX_GPIO137__FUNC_GPIO137>;
output-high;
};
pins-report-sw {
pinmux = <PINMUX_GPIO138__FUNC_GPIO138>;
output-low;
};
};
};
&spi1 {