gpiolib: allow to specify the firmware node in struct gpio_chip

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Software nodes allow us to represent hierarchies for device components
that don't have their struct device representation yet - for instance:
banks of GPIOs under a common GPIO expander. The core gpiolib core
however doesn't offer any way of passing this information from the
drivers.

This extends struct gpio_chip with a pointer to fwnode that can be set
by the driver and used to pass device properties for child nodes.

This is similar to how we handle device-tree sub-nodes with
CONFIG_OF_GPIO enabled.

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

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This commit is contained in:

Bartosz Golaszewski 2021-12-13 11:16:41 +01:00

parent dd61b29207

commit 990f6756bb

2 changed files with 8 additions and 1 deletions

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7

drivers/gpio/gpiolib.c

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2

include/linux/gpio/driver.h

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