linux-kernel - Re: [PATCH 2/2] Input: st1232

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Date:   Tue, 5 Feb 2019 11:20:16 +0100
From:   Martin Kepplinger <martin.kepplinger@...zinger.com>
To:     Martin Kepplinger <martink@...teo.de>,
        <devicetree@...r.kernel.org>, <linux-input@...r.kernel.org>
CC:     <dmitry.torokhov@...il.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] Input: st1232 - switch to gpiod API



Martin Kepplinger | Entwicklung Software 

GINZINGER ELECTRONIC SYSTEMS GMBH

Tel.: +43 7723 5422 157
Mail: martin.kepplinger@...zinger.com
Web: www.ginzinger.com




On 29.01.19 11:23, Martin Kepplinger wrote:
> From: Martin Kepplinger <martin.kepplinger@...zinger.com>
> 
> Use devm_gpiod_get_optional() and gpiod_set_value_cansleep() instead
> of the old API. The st1232_ts_power() now passes on the inverted "poweron"
> value to reflect the correct logical value.
> 
> Signed-off-by: Martin Kepplinger <martin.kepplinger@...zinger.com>
> ---
> 
> Tested and works. thanks for your help Dmitry,
> 

is this what you had in mind? any problems or questions?

thanks
                              martin


> 
> 
> 
>   drivers/input/touchscreen/st1232.c | 22 ++++++++++------------
>   1 file changed, 10 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c
> index 777df903605d..04d75b08be44 100644
> --- a/drivers/input/touchscreen/st1232.c
> +++ b/drivers/input/touchscreen/st1232.c
> @@ -45,7 +45,7 @@ struct st1232_ts_data {
>   	struct i2c_client *client;
>   	struct input_dev *input_dev;
>   	struct dev_pm_qos_request low_latency_req;
> -	int reset_gpio;
> +	struct gpio_desc *reset_gpio;
>   	const struct st_chip_info *chip_info;
>   	int read_buf_len;
>   	u8 *read_buf;
> @@ -142,8 +142,8 @@ static irqreturn_t st1232_ts_irq_handler(int irq, void *dev_id)
>   
>   static void st1232_ts_power(struct st1232_ts_data *ts, bool poweron)
>   {
> -	if (gpio_is_valid(ts->reset_gpio))
> -		gpio_direction_output(ts->reset_gpio, poweron);
> +	if (ts->reset_gpio)
> +		gpiod_set_value_cansleep(ts->reset_gpio, !poweron);
>   }
>   
>   static const struct st_chip_info st1232_chip_info = {
> @@ -215,15 +215,13 @@ static int st1232_ts_probe(struct i2c_client *client,
>   	ts->client = client;
>   	ts->input_dev = input_dev;
>   
> -	ts->reset_gpio = of_get_gpio(client->dev.of_node, 0);
> -	if (gpio_is_valid(ts->reset_gpio)) {
> -		error = devm_gpio_request(&client->dev, ts->reset_gpio, NULL);
> -		if (error) {
> -			dev_err(&client->dev,
> -				"Unable to request GPIO pin %d.\n",
> -				ts->reset_gpio);
> -				return error;
> -		}
> +	ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
> +						 GPIOD_OUT_HIGH);
> +	if (IS_ERR(ts->reset_gpio)) {
> +		error = PTR_ERR(ts->reset_gpio);
> +		dev_err(&client->dev, "Unable to request GPIO pin: %d.\n",
> +			error);
> +		return error;
>   	}
>   
>   	st1232_ts_power(ts, true);
> 




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