eeprom: at24: driver refactoring

This series contains what I hope to be a non-controversial refactoring of the at24 eeprom driver.

Most changes revolve around at24_probe() which became quite complicated and hard to read.

The only functional changes are: disabling the internal locking mechanisms of regmap (since we already take care of that in the driver) and removing an if checking if byte_len is a power of 2 (as we do support models for which it's not true).

All other patches affect readability and code structure.

Tested with a couple models and different both for device tree and platform data modes.

Bartosz Golaszewski (21):
eeprom: at24: disable regmap locking
eeprom: at24: remove nvmem_config from at24_data
eeprom: at24: arrange local variables
eeprom: at24: use SPDX identifier instead of GPL boiler-plate
eeprom: at24: remove code separators
eeprom: at24: drop redundant variable in at24_read()
eeprom: at24: drop redundant variable in at24_write()
eeprom: at24: make struct initialization uniform in at24_probe()
eeprom: at24: don't check if byte_len is a power of 2
eeprom: at24: rename at24_get_pdata()
eeprom: at24: rename chip to pdata in at24_probe()
eeprom: at24: use a helper variable for dev
eeprom: at24: readability tweak in at24_probe()
eeprom: at24: provide and use at24_base_client_dev()
eeprom: at24: switch to using probe_new() from the i2c framework
eeprom: at24: move platform data processing into a separate routine
eeprom: at24: remove at24_platform_data from at24_data
eeprom: at24: refactor at24_probe()
eeprom: at24: tweak newlines
eeprom: at24: fix a line break
eeprom: at24: simplify the i2c functionality checking

 drivers/misc/eeprom/at24.c | 293 ++++++++++++++++++++++++---------------------
 1 file changed, 156 insertions(+), 137 deletions(-)

2.16.1