On Sat, Sep 4, 2021 at 3:17 AM Dmitry Torokhov
<dmitry.torokhov@xxxxxxxxx> wrote:
>
> Hi Rogerio,
>
> On Fri, Sep 03, 2021 at 01:54:48PM -0300, Rogerio Pimentel wrote:
> > Adding the device model into the device name is useful when
> > applications need to set different parameters according to the
> > touchscreen being used, e.g. X11 calibration points.
>
> Typically model would go into input->id.product and optionally
> input->id.version.
>
> >
> > Signed-off-by: Rogerio Pimentel <rpimentel.silva@xxxxxxxxx>
> > ---
> >
> > Changes since v1: Get the device ID from touchscreen controller
> > instead of driver's device list.
> >
> > drivers/input/touchscreen/ili210x.c | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c
> > index 199cf3daec10..7a897a03ed70 100644
> > --- a/drivers/input/touchscreen/ili210x.c
> > +++ b/drivers/input/touchscreen/ili210x.c
> > @@ -19,10 +19,14 @@
> > #define ILI251X_DATA_SIZE1 31
> > #define ILI251X_DATA_SIZE2 20
> >
> > +#define ILI_NAME_LEN 27
> > +#define ILITEK_TS_NAME "Ilitek ILI%x%x Touchscreen"
> > +
> > /* Touchscreen commands */
> > #define REG_TOUCHDATA 0x10
> > #define REG_PANEL_INFO 0x20
> > #define REG_CALIBRATE 0xcc
> > +#define REG_TS_MODEL 0x61
> >
> > struct ili2xxx_chip {
> > int (*read_reg)(struct i2c_client *client, u8 reg,
> > @@ -384,6 +388,8 @@ static int ili210x_i2c_probe(struct i2c_client *client,
> > struct input_dev *input;
> > int error;
> > unsigned int max_xy;
> > + unsigned char buf[2];
> > + char *model_name;
> >
> > dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");
> >
> > @@ -430,7 +436,10 @@ static int ili210x_i2c_probe(struct i2c_client *client,
> > i2c_set_clientdata(client, priv);
> >
> > /* Setup input device */
> > - input->name = "ILI210x Touchscreen";
> > + input->name = ILITEK_TS_NAME;
> > + model_name = (char *)input->name;
>
> Umm, no. Smashing RO data is not nice.
>
> > + priv->chip->read_reg(priv->client, REG_TS_MODEL, buf, 2);
> > + snprintf(model_name, ILI_NAME_LEN, input->name, buf[1], buf[0]);
> > input->id.bustype = BUS_I2C;
> >
> > /* Multi touch */
> > --
> > 2.17.1
> >
>
> Thanks.
>
I agree with the comments.
Please, discard this patch.
Rogerio
> --
> Dmitry
