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https://github.com/edk2-porting/linux-next.git
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f408c985ce
The existing gpio_to_irq() implementation on sa1100 only translates validly for internal GPIOs. Since this sub-arch enables GPIOLIB support, this results in buggy translations for non-internal GPIOs. Get rid of the private gpio_to_irq() implementation, replacing it with the .to_irq method in the sa1100 gpio chip instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/*
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* linux/arch/arm/mach-sa1100/gpio.c
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*
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* Generic SA-1100 GPIO handling
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <mach/hardware.h>
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static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
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{
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return GPLR & GPIO_GPIO(offset);
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}
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static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
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{
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if (value)
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GPSR = GPIO_GPIO(offset);
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else
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GPCR = GPIO_GPIO(offset);
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}
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static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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unsigned long flags;
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local_irq_save(flags);
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GPDR &= ~GPIO_GPIO(offset);
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local_irq_restore(flags);
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return 0;
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}
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static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
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{
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unsigned long flags;
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local_irq_save(flags);
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sa1100_gpio_set(chip, offset, value);
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GPDR |= GPIO_GPIO(offset);
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local_irq_restore(flags);
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return 0;
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}
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static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset)
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{
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return offset < 11 ? (IRQ_GPIO0 + offset) : (IRQ_GPIO11 - 11 + offset);
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}
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static struct gpio_chip sa1100_gpio_chip = {
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.label = "gpio",
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.direction_input = sa1100_direction_input,
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.direction_output = sa1100_direction_output,
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.set = sa1100_gpio_set,
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.get = sa1100_gpio_get,
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.to_irq = sa1100_to_irq,
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.base = 0,
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.ngpio = GPIO_MAX + 1,
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};
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void __init sa1100_init_gpio(void)
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{
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gpiochip_add(&sa1100_gpio_chip);
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}
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