linux-kernel - [PATCH 2/2] Input: exc3000 - Support power supply regulators

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Date:   Mon, 3 Jul 2023 10:45:36 +0200
From:   Mike Looijmans <mike.looijmans@...ic.nl>
To:     devicetree@...r.kernel.org, linux-input@...r.kernel.org
CC:     Mike Looijmans <mike.looijmans@...ic.nl>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] Input: exc3000 - Support power supply regulators

Add power supply regulator support to the exc3000 devices.

Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>

---

 drivers/input/touchscreen/exc3000.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index 4af4c1e5d0da..3e50af8a4a2d 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -18,6 +18,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/regulator/consumer.h>
 #include <linux/sizes.h>
 #include <linux/timer.h>
 #include <asm/unaligned.h>
@@ -360,6 +361,12 @@ static int exc3000_probe(struct i2c_client *client)
 	if (IS_ERR(data->reset))
 		return PTR_ERR(data->reset);
 
+	/* For proper reset sequence, enable power while reset asserted */
+	error = devm_regulator_get_enable_optional(&client->dev, "vdd");
+	if (error && error != -ENODEV)
+		dev_err_probe(&client->dev, error,
+			      "failed to request vdd regulator\n");
+
 	if (data->reset) {
 		msleep(EXC3000_RESET_MS);
 		gpiod_set_value_cansleep(data->reset, 0);
-- 
2.17.1


Met vriendelijke groet / kind regards,

Mike Looijmans
System Expert


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