On Mon, 2 Jul 2018 08:53:00 +0200
Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx> wrote:
> On Sat, 30 Jun 2018, Jonathan Cameron wrote:
>
> > On Fri, 29 Jun 2018 10:10:10 +0200
> > Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> >> Currently, the driver bails out if not explicitly referred to in
> >> DT or ACPI tables. This prevents fallback mechanisms from coming
> >> into effect, e.g. I2C device ID table match via DT or ACPI
> >> PRP0001 HID. However DT/ACPI enum should take precedence over
> >> the fallback, so evaluate that first.
> >>
> >> Signed-off-by: Nikolaus Voss <nikolaus.voss@xxxxxxxxxxxxxxxxxxxxx>
> >
> > Is the change to probe_new actually related to the rest of the change?
> >
> > I can't immediately see why... If not I would prefer that as a separate
> > change.
>
> Well, it is, because the id table pointer of the old probe() is not
> used any more.
Hmm. Fair enough, kind of incidental cleanup rather than anything more.
J
>
> >
> >> ---
> >> drivers/iio/accel/st_accel_i2c.c | 21 ++++++++++++---------
> >> 1 file changed, 12 insertions(+), 9 deletions(-)
> >>
> >> diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c
> >> index 6bdec8c451e0..e360da407027 100644
> >> --- a/drivers/iio/accel/st_accel_i2c.c
> >> +++ b/drivers/iio/accel/st_accel_i2c.c
> >> @@ -138,8 +138,7 @@ static const struct i2c_device_id st_accel_id_table[] = {
> >> };
> >> MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
> >>
> >> -static int st_accel_i2c_probe(struct i2c_client *client,
> >> - const struct i2c_device_id *id)
> >> +static int st_accel_i2c_probe(struct i2c_client *client)
> >> {
> >> struct iio_dev *indio_dev;
> >> struct st_sensor_data *adata;
> >> @@ -156,14 +155,18 @@ static int st_accel_i2c_probe(struct i2c_client *client,
> >> client->name, sizeof(client->name));
> >> } else if (ACPI_HANDLE(&client->dev)) {
> >> ret = st_sensors_match_acpi_device(&client->dev);
> >> - if ((ret < 0) || (ret >= ST_ACCEL_MAX))
> >> - return -ENODEV;
> >> -
> >> - strlcpy(client->name, st_accel_id_table[ret].name,
> >> + if ((ret >= 0) && (ret < ST_ACCEL_MAX))
> >> + strlcpy(client->name, st_accel_id_table[ret].name,
> >> sizeof(client->name));
> >> - } else if (!id)
> >> - return -ENODEV;
> >> + }
> >>
> >> + /*
> >> + * If OF and ACPI enumeration failed, there could still be platform
> >> + * information via fallback enumeration or explicit instantiation, so
> >> + * check if id table has been matched via client->name.
> >> + */
> >> + if (!client->name)
> >> + return -ENODEV;
> >>
> >> st_sensors_i2c_configure(indio_dev, client, adata);
> >>
> >> @@ -187,7 +190,7 @@ static struct i2c_driver st_accel_driver = {
> >> .of_match_table = of_match_ptr(st_accel_of_match),
> >> .acpi_match_table = ACPI_PTR(st_accel_acpi_match),
> >> },
> >> - .probe = st_accel_i2c_probe,
> >> + .probe_new = st_accel_i2c_probe,
> >> .remove = st_accel_i2c_remove,
> >> .id_table = st_accel_id_table,
> >> };
> >
> >
> --
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