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ARM: dts: iwg22d-sodimm: Enable touchscreen

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In one of the iWave-G22D development board variants, called Generic SODIMM
Development Platform, we have an LCD with touchscreen. The resistive touch
controller, STMPE811 is on the development board and is connected through
the i2c5 of the RZ-G1E.

Additionally, this controller should generate an interrupt to the CPU and
it is connected through GPIO4,4 to the GIC.

Touch was tested with one of our iW-RainboW-G22D-SODIMM RZ/G1E development
platforms.

More details on the iWave website:
https://www.iwavesystems.com/rz-g1e-sodimm-development-kit.html

Signed-off-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Link: https://lore.kernel.org/r/1583336650-25848-1-git-send-email-marian-cristian.rotariu.rb@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Marian-Cristian Rotariu 2020-03-04 15:44:10 +00:00 committed by Geert Uytterhoeven
parent 7f61dff1ed
commit 99ae78f1fc
1 changed files with 33 additions and 0 deletions
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33
arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
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@ -171,6 +171,39 @@ &i2c5 {
status = "okay";
clock-frequency = <400000>;
stmpe811@44 {
compatible = "st,stmpe811";
reg = <0x44>;
interrupt-parent = <&gpio4>;
interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
/* 3.25 MHz ADC clock speed */
st,adc-freq = <1>;
/* ADC converstion time: 80 clocks */
st,sample-time = <4>;
/* 12-bit ADC */
st,mod-12b = <1>;
/* internal ADC reference */
st,ref-sel = <0>;
stmpe_touchscreen {
compatible = "st,stmpe-ts";
/* 8 sample average control */
st,ave-ctrl = <3>;
/* 7 length fractional part in z */
st,fraction-z = <7>;
/*
* 50 mA typical 80 mA max touchscreen drivers
* current limit value
*/
st,i-drive = <1>;
/* 1 ms panel driver settling time */
st,settling = <3>;
/* 5 ms touch detect interrupt delay */
st,touch-det-delay = <5>;
};
};
sgtl5000: codec@a {
compatible = "fsl,sgtl5000";
#sound-dai-cells = <0>;