linux-kernel - [PATCH v2 8/8] platform/chrome: of_hw_prober: Support touchscreen probing on Squirtle

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Message-ID: <20250421101248.426929-9-wenst@chromium.org>
Date: Mon, 21 Apr 2025 18:12:46 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Benson Leung <bleung@...omium.org>,
	Tzung-Bi Shih <tzungbi@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	chrome-platform@...ts.linux.dev,
	linux-input@...r.kernel.org,
	Douglas Anderson <dianders@...omium.org>
Subject: [PATCH v2 8/8] platform/chrome: of_hw_prober: Support touchscreen probing on Squirtle

The MT8186 Squirtle Chromebook is built with one of two possible
touchscreens. Let the prober probe for them.

Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
 drivers/platform/chrome/chromeos_of_hw_prober.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/platform/chrome/chromeos_of_hw_prober.c b/drivers/platform/chrome/chromeos_of_hw_prober.c
index 10dbaede0541..f3cd612e5584 100644
--- a/drivers/platform/chrome/chromeos_of_hw_prober.c
+++ b/drivers/platform/chrome/chromeos_of_hw_prober.c
@@ -59,6 +59,7 @@ static int chromeos_i2c_component_prober(struct device *dev, const void *_data)
 DEFINE_CHROMEOS_I2C_PROBE_DATA_DUMB_BY_TYPE(touchscreen);
 DEFINE_CHROMEOS_I2C_PROBE_DATA_DUMB_BY_TYPE(trackpad);
 
+DEFINE_CHROMEOS_I2C_PROBE_CFG_SIMPLE_BY_TYPE(touchscreen);
 DEFINE_CHROMEOS_I2C_PROBE_CFG_SIMPLE_BY_TYPE(trackpad);
 
 static const struct chromeos_i2c_probe_data chromeos_i2c_probe_hana_trackpad = {
@@ -76,6 +77,17 @@ static const struct chromeos_i2c_probe_data chromeos_i2c_probe_hana_trackpad = {
 	},
 };
 
+static const struct chromeos_i2c_probe_data chromeos_i2c_probe_squirtle_touchscreen = {
+	.cfg = &chromeos_i2c_probe_simple_touchscreen_cfg,
+	.opts = &(const struct i2c_of_probe_simple_opts) {
+		.res_node_compatible = "elan,ekth6a12nay",
+		.supply_name = "vcc33",
+		.gpio_name = "reset",
+		.post_power_on_delay_ms = 10,
+		.post_gpio_config_delay_ms = 300,
+	},
+};
+
 static const struct hw_prober_entry hw_prober_platforms[] = {
 	{
 		.compatible = "google,hana",
@@ -93,6 +105,10 @@ static const struct hw_prober_entry hw_prober_platforms[] = {
 		.compatible = "google,squirtle",
 		.prober = chromeos_i2c_component_prober,
 		.data = &chromeos_i2c_probe_dumb_trackpad,
+	}, {
+		.compatible = "google,squirtle",
+		.prober = chromeos_i2c_component_prober,
+		.data = &chromeos_i2c_probe_squirtle_touchscreen,
 	}, {
 		.compatible = "google,steelix",
 		.prober = chromeos_i2c_component_prober,
-- 
2.49.0.805.g082f7c87e0-goog