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Input: ili210x - optionally show calibrate sysfs attribute 

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.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Link: https://lore.kernel.org/r/20191112210148.3535-2-TheSven73@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Sven Van Asbroeck 2019-11-12 15:44:10 -08:00 committed by Dmitry Torokhov
parent b32fbeaec5
commit cc12ba1872
1 changed files with 14 additions and 0 deletions
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14
drivers/input/touchscreen/ili210x.c
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@ -33,6 +33,7 @@ struct ili2xxx_chip {
bool (*continue_polling)(const u8 *data, bool touch);
unsigned int max_touches;
unsigned int resolution;
bool has_calibrate_reg;
};
struct ili210x {
@ -103,6 +104,7 @@ 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)
@ -228,6 +230,7 @@ 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)
@ -311,8 +314,19 @@ 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)