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authorMarian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>2020-03-04 15:44:10 +0000
committerGeert Uytterhoeven <geert+renesas@glider.be>2020-03-11 09:01:09 +0100
commit99ae78f1fc3a73c88fe726c676ae963ce722bf20 (patch)
treef68c6bf550490b0f923083f7659b82dc1c2125b7 /arch/arm
parent7f61dff1ed915c44845d6865d295853b1c39b6d7 (diff)
ARM: dts: iwg22d-sodimm: Enable touchscreen
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts b/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
index 2487ba0e9c9f..b15b1b088a32 100644
--- a/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
+++ b/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
@@ -171,6 +171,39 @@
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>;