[PATCH v3 0/2] IIO: st_sensors_i2c: improve device enumeration

From: Nikolaus Voss
Date: Wed Jul 04 2018 - 09:35:25 EST

When trying to instantiate a st_accel_i2c device from an ACPI based
system, I ran into some problems:

For my device, there is no ACPI match table entry, so rather than
creating /allocating a new ACPI HID for the device, I wanted to use an
existing DT table compatible entry via creating an ACPI_DT_NAMESPACE_HID
/PRP0001 HID ACPI entry (see Documentation/acpi/enumeration.txt).

This did not work because st_accel_i2c.c bails out if there is a ACPI
node but no ACPI table match. Use device_get_match_data API to get the
right driver data.

acpi_device_get_match_data() currently doesn't return DT compatible
matches. A separate patch is submitted to fix this.

- remove unused i2c_device_id .driver_data fields as suggested by
Javier Martinez Canillas.
- use device_get_match_data API as suggested by Andy Shevchenko
- removed syncing DT/I2C table names as Jonathan Cameron pointed out
this would be an ABI change
- converting from probe() to probe_new() is moved into a separate
patch (as suggested by Jonathan Cameron)

Nikolaus Voss (2):
IIO: st_accel_i2c.c: Simplify access to driver data
IIO: st_accel_i2c.c: Use probe_new() instead of probe()

drivers/iio/accel/st_accel_i2c.c | 61 ++++++++++++++------------------
1 file changed, 26 insertions(+), 35 deletions(-)