public inbox for cip-dev@lists.cip-project.org
 help / color / mirror / Atom feed
* [cip-dev] [PATCH 4.4.y-cip] ARM: dts: iwg22d-sodimm: Enable touchscreen
@ 2020-07-29 10:56 Biju Das
  2020-07-30  1:12 ` Nobuhiro Iwamatsu
  0 siblings, 1 reply; 7+ messages in thread
From: Biju Das @ 2020-07-29 10:56 UTC (permalink / raw)
  To: cip-dev, Nobuhiro Iwamatsu, Pavel Machek
  Cc: Chris Paterson, Biju Das, Prabhakar Mahadev Lad

[-- Attachment #1: Type: text/plain, Size: 2313 bytes --]

From: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>

commit 99ae78f1fc3a73c88fe726c676ae963ce722bf20 upstream.

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>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
 arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts | 33 +++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts b/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
index 1e331d1e414b..5cd989556b60 100644
--- a/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
+++ b/arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts
@@ -149,6 +149,39 @@
 	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>;
-- 
2.17.1


[-- Attachment #2: Type: text/plain, Size: 419 bytes --]

-=-=-=-=-=-=-=-=-=-=-=-
Links: You receive all messages sent to this group.

View/Reply Online (#5045): https://lists.cip-project.org/g/cip-dev/message/5045
Mute This Topic: https://lists.cip-project.org/mt/75862490/4520388
Group Owner: cip-dev+owner@lists.cip-project.org
Unsubscribe: https://lists.cip-project.org/g/cip-dev/leave/8129055/727948398/xyzzy  [cip-dev@archiver.kernel.org]
-=-=-=-=-=-=-=-=-=-=-=-

^ permalink raw reply related	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2020-08-03 11:27 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-07-29 10:56 [cip-dev] [PATCH 4.4.y-cip] ARM: dts: iwg22d-sodimm: Enable touchscreen Biju Das
2020-07-30  1:12 ` Nobuhiro Iwamatsu
2020-07-30  7:10   ` Biju Das
2020-07-31 20:03     ` Nobuhiro Iwamatsu
2020-08-01  9:55       ` Biju Das
2020-07-30  9:47   ` Pavel Machek
2020-07-31 20:04     ` Nobuhiro Iwamatsu

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox