linux-kernel - Re: [PATCH v2 2/2] Input: ili210x - optionally show calibrate sysfs attribute

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Message-ID: <20191112235247.GF13374@dtor-ws>
Date:   Tue, 12 Nov 2019 15:52:47 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Sven Van Asbroeck <thesven73@...il.com>
Cc:     Marek Vasut <marex@...x.de>, Adam Ford <aford173@...il.com>,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH v2 2/2] Input: ili210x - optionally show calibrate sysfs
 attribute

On Tue, Nov 12, 2019 at 04:01:48PM -0500, Sven Van Asbroeck wrote:
> Only show the 'calibrate' sysfs attribute on chip flavours
> which support calibration by writing to a calibration register.
> 
> Do this by adding a flag to the chip operations structure.
> 
> Link: https://lore.kernel.org/lkml/20191111181657.GA57214@dtor-ws/
> Cc: Marek Vasut <marex@...x.de>
> Cc: Adam Ford <aford173@...il.com>
> Cc: <linux-kernel@...r.kernel.org>
> Cc: linux-input@...r.kernel.org
> Tree: https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/log/?h=next
> Signed-off-by: Sven Van Asbroeck <TheSven73@...il.com>

Applied, thank you.

> ---
>  drivers/input/touchscreen/ili210x.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c
> index 3b8e24815a1f..b0454cdacf38 100644
> --- a/drivers/input/touchscreen/ili210x.c
> +++ b/drivers/input/touchscreen/ili210x.c
> @@ -32,6 +32,7 @@ struct ili2xxx_chip {
>  	bool (*continue_polling)(const u8 *data, bool touch);
>  	unsigned int max_touches;
>  	unsigned int resolution;
> +	bool has_calibrate_reg;
>  };
>  
>  struct ili210x {
> @@ -102,6 +103,7 @@ static const struct ili2xxx_chip ili210x_chip = {
>  	.parse_touch_data	= ili210x_touchdata_to_coords,
>  	.continue_polling	= ili210x_check_continue_polling,
>  	.max_touches		= 2,
> +	.has_calibrate_reg	= true,
>  };
>  
>  static int ili211x_read_touch_data(struct i2c_client *client, u8 *data)
> @@ -227,6 +229,7 @@ static const struct ili2xxx_chip ili251x_chip = {
>  	.parse_touch_data	= ili251x_touchdata_to_coords,
>  	.continue_polling	= ili251x_check_continue_polling,
>  	.max_touches		= 10,
> +	.has_calibrate_reg	= true,
>  };
>  
>  static bool ili210x_report_events(struct ili210x *priv, u8 *touchdata)
> @@ -310,8 +313,19 @@ static struct attribute *ili210x_attributes[] = {
>  	NULL,
>  };
>  
> +static umode_t ili210x_calibrate_visible(struct kobject *kobj,
> +					  struct attribute *attr, int index)
> +{
> +	struct device *dev = kobj_to_dev(kobj);
> +	struct i2c_client *client = to_i2c_client(dev);
> +	struct ili210x *priv = i2c_get_clientdata(client);
> +
> +	return priv->chip->has_calibrate_reg;
> +}
> +
>  static const struct attribute_group ili210x_attr_group = {
>  	.attrs = ili210x_attributes,
> +	.is_visible = ili210x_calibrate_visible,
>  };
>  
>  static void ili210x_power_down(void *data)
> -- 
> 2.17.1
> 

-- 
Dmitry