gpio / ACPI: Allocate ACPI specific data directly in acpi_gpiochip_add()
We are going to add more ACPI specific data to accompany GPIO chip so instead of allocating it per each use-case we allocate it once when acpi_gpiochip_add() is called and release it when acpi_gpiochip_remove() is called. Doing this allows us to add more ACPI specific data by merely adding new fields to struct acpi_gpio_chip. In addition we embed evt_pins member directly to the structure instead of having it as a pointer. This simplifies the code a bit since we don't need to check against NULL. Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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