GPIO: gpio-pxa: simplify pxa_gpio_to_irq() and pxa_irq_to_chip()
Simplify the code in gpio-pxa.c and make them based on irq_base. When not probed from devicetree, initialize irq_base from PXA_GPIO_TO_IRQ() or MMP_GPIO_TO_IRQ(), respectively, so the non-DT case still works. Only tested on PXA3xx. Signed-off-by: Daniel Mack <zonque@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
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