2018-08-23 12:33 GMT+02:00 Linus Walleij [off-list ref]:

This makes it possible to pass an initialized GPIO descriptor
to the driver through platform data.

This is useful when we are dealing with EEPROMs on expansion
boards where the GPIO has to be looked up indirectly using a
connector abstraction (several systems using the same
connector) so the machine descriptor tables cannot be used
to associate the descriptor with the device and we then want
to pass this descriptor on to the EEPROM driver this way
instead.

Ugh I don't like this at all. In fact I'm right now trying to *get
rid* of platform_data from at24 in favor of device properties[1].

Part of the changes from my series actually removes the setup function
from at24 and replaces it with a notifier fired by the nvmem
framework.

I would really prefer that we introduce some generic way of handling
write-protect mechanisms in nvmem. Maybe starting by moving the
wp_gpio to nvmem and then passing it in nvmem_config?

Best regards,
Bartosz Golaszewski

[1] https://patchwork.kernel.org/cover/10562365/