[PATCH 004/182] gpio: generic: factor into gpio_chip struct

* Linus Walleij [off-list ref] [151209 05:14]:

The separate struct bgpio_chip has been a pain to handle, both
by being confusingly similar in name to struct gpio_chip and
for being contained inside a struct so that struct gpio_chip
is contained in a struct contained in a struct, making several
steps of dereferencing necessary.

Make things simpler: include the fields directly into
<linux/gpio/driver.h>, #ifdef:ed for CONFIG_GENERIC_GPIO, and
get rid of the <linux/basic_mmio_gpio.h> altogether. Prefix
some of the member variables with bgpio_* and add proper
kerneldoc while we're at it.

Modify all users to handle the change and use a struct
gpio_chip directly. And while we're at it: replace all
container_of() dereferencing by gpiochip_get_data() and
registering the gpio_chip with gpiochip_add_data().

...

---
ARM SoC folks and Lee: it would be great if you could
ACK the few lines hitting arch/arm/* and drivers/mfd/* in this
so I can take it through the GPIO tree.

For omap:

Acked-by: Tony Lindgren <tony@atomide.com>