065936bc48
Since the Armbian sources refer to linux 4.19.76 as being linux-mainline, all the patches from linux-4.19 were moved to linux-mainline_4.19 and the linux_4.19.76 recipes was named accordingly. This patch makes 4.19.76 as default version for linux Signed-off-by: Vicentiu Galanopulo <vicentiu@balena.io>
127 lines
4 KiB
Diff
127 lines
4 KiB
Diff
From 997e53ee52efc4a0602bf298125a7c9758abf15c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Myl=C3=A8ne=20Josserand?= <mylene.josserand@bootlin.com>
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Date: Wed, 25 Jul 2018 09:34:08 +0200
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Subject: [PATCH 17/82] Input: edt-ft5x06 - Add support for regulator
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Add the support of regulator to use it as VCC source.
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Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
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Reviewed-by: Rob Herring <robh@kernel.org>
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---
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.../bindings/input/touchscreen/edt-ft5x06.txt | 1 +
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drivers/input/touchscreen/edt-ft5x06.c | 43 +++++++++++++++++++
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2 files changed, 44 insertions(+)
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diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
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index da2dc5d6c98b..987faeb2fe4a 100644
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--- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
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+++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
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@@ -28,6 +28,7 @@ Required properties:
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Optional properties:
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- reset-gpios: GPIO specification for the RESET input
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- wake-gpios: GPIO specification for the WAKE input
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+ - vcc-supply: Regulator that supplies the touchscreen
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- pinctrl-names: should be "default"
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- pinctrl-0: a phandle pointing to the pin settings for the
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diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
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index 1e18ca0d1b4e..dcde719094f7 100644
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--- a/drivers/input/touchscreen/edt-ft5x06.c
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+++ b/drivers/input/touchscreen/edt-ft5x06.c
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@@ -39,6 +39,7 @@
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#include <linux/input/mt.h>
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#include <linux/input/touchscreen.h>
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#include <linux/of_device.h>
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+#include <linux/regulator/consumer.h>
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#define WORK_REGISTER_THRESHOLD 0x00
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#define WORK_REGISTER_REPORT_RATE 0x08
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@@ -91,6 +92,7 @@ struct edt_ft5x06_ts_data {
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struct touchscreen_properties prop;
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u16 num_x;
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u16 num_y;
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+ struct regulator *vcc;
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struct gpio_desc *reset_gpio;
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struct gpio_desc *wake_gpio;
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@@ -963,6 +965,13 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
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}
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}
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+static void edt_ft5x06_disable_regulator(void *arg)
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+{
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+ struct edt_ft5x06_ts_data *data = arg;
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+
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+ regulator_disable(data->vcc);
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+}
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+
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static int edt_ft5x06_ts_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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@@ -991,6 +1000,28 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
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tsdata->max_support_points = chip_data->max_support_points;
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+ tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
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+ if (IS_ERR(tsdata->vcc)) {
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+ error = PTR_ERR(tsdata->vcc);
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+ if (error != -EPROBE_DEFER)
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+ dev_err(&client->dev, "failed to request regulator: %d\n",
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+ error);
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+ return error;
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+ }
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+
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+ error = regulator_enable(tsdata->vcc);
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+ if (error < 0) {
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+ dev_err(&client->dev, "failed to enable vcc: %d\n",
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+ error);
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+ return error;
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+ }
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+
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+ error = devm_add_action_or_reset(&client->dev,
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+ edt_ft5x06_disable_regulator,
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+ tsdata);
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+ if (error)
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+ return error;
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+
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tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
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"reset", GPIOD_OUT_HIGH);
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if (IS_ERR(tsdata->reset_gpio)) {
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@@ -1120,9 +1151,12 @@ static int edt_ft5x06_ts_remove(struct i2c_client *client)
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static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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+ struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
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if (device_may_wakeup(dev))
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enable_irq_wake(client->irq);
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+ else
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+ regulator_disable(tsdata->vcc);
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return 0;
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}
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@@ -1130,9 +1164,18 @@ static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
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static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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+ struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
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+ int ret;
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if (device_may_wakeup(dev))
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disable_irq_wake(client->irq);
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+ else {
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+ ret = regulator_enable(tsdata->vcc);
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+ if (ret < 0) {
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+ dev_err(dev, "failed to enable vcc: %d\n", ret);
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+ return ret;
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+ }
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+ }
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return 0;
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}
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--
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2.20.1
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