linux-kernel - Re: [PATCH 1/3] input: edt-ft5x06: Add support for regulator

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Message-ID: <20191029041233.GD57214@dtor-ws>
Date:   Mon, 28 Oct 2019 21:12:33 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Ondrej Jirman <megous@...ous.com>
Cc:     linux-sunxi@...glegroups.com, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mylène Josserand 
        <mylene.josserand@...tlin.com>, linux-input@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] input: edt-ft5x06: Add support for regulator

On Tue, Oct 29, 2019 at 01:58:04AM +0100, Ondrej Jirman wrote:
> From: Mylène Josserand <mylene.josserand@...tlin.com>
> 
> Add the support for enabling optional regulator that may be used as VCC
> source.
> 
> Signed-off-by: Ondrej Jirman <megous@...ous.com>
> Signed-off-by: Mylène Josserand <mylene.josserand@...tlin.com>

Applied, thank you.

> ---
>  drivers/input/touchscreen/edt-ft5x06.c | 30 ++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
> 
> diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
> index 5525f1fb1526..d61731c0037d 100644
> --- a/drivers/input/touchscreen/edt-ft5x06.c
> +++ b/drivers/input/touchscreen/edt-ft5x06.c
> @@ -28,6 +28,7 @@
>  #include <linux/input/mt.h>
>  #include <linux/input/touchscreen.h>
>  #include <asm/unaligned.h>
> +#include <linux/regulator/consumer.h>
>  
>  #define WORK_REGISTER_THRESHOLD		0x00
>  #define WORK_REGISTER_REPORT_RATE	0x08
> @@ -88,6 +89,7 @@ struct edt_ft5x06_ts_data {
>  	struct touchscreen_properties prop;
>  	u16 num_x;
>  	u16 num_y;
> +	struct regulator *vcc;
>  
>  	struct gpio_desc *reset_gpio;
>  	struct gpio_desc *wake_gpio;
> @@ -1036,6 +1038,13 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
>  	}
>  }
>  
> +static void edt_ft5x06_disable_regulator(void *arg)
> +{
> +	struct edt_ft5x06_ts_data *data = arg;
> +
> +	regulator_disable(data->vcc);
> +}
> +
>  static int edt_ft5x06_ts_probe(struct i2c_client *client,
>  					 const struct i2c_device_id *id)
>  {
> @@ -1064,6 +1073,27 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
>  
>  	tsdata->max_support_points = chip_data->max_support_points;
>  
> +	tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
> +	if (IS_ERR(tsdata->vcc)) {
> +		error = PTR_ERR(tsdata->vcc);
> +		if (error != -EPROBE_DEFER)
> +			dev_err(&client->dev,
> +				"failed to request regulator: %d\n", error);
> +		return error;
> +	}
> +
> +	error = regulator_enable(tsdata->vcc);
> +	if (error < 0) {
> +		dev_err(&client->dev, "failed to enable vcc: %d\n", error);
> +		return error;
> +	}
> +
> +	error = devm_add_action_or_reset(&client->dev,
> +					 edt_ft5x06_disable_regulator,
> +					 tsdata);
> +	if (error)
> +		return error;
> +
>  	tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
>  						     "reset", GPIOD_OUT_HIGH);
>  	if (IS_ERR(tsdata->reset_gpio)) {
> -- 
> 2.23.0
> 

-- 
Dmitry