2763ee6448
The ColdFire architecture specific gpio support code registers a sysfs
bus device named "gpio". This clashes with the new generic API device
added in commit 3c702e99 ("gpio: add a userspace chardev ABI for GPIOs").
The old ColdFire sysfs gpio device was never used for anything specific,
and no links or other nodes were created under it. The new API sysfs gpio
device has all the same default sysfs links (device, drivers, etc) and
they are properly populated.
Remove the old ColdFire sysfs gpio registration.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
180 lines
4.1 KiB
C
180 lines
4.1 KiB
C
/*
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* Coldfire generic GPIO support.
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*
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* (C) Copyright 2009, Steven King <sfking@fdwdc.com>
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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 as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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#include <asm/mcfgpio.h>
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int __mcfgpio_get_value(unsigned gpio)
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{
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return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio);
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}
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EXPORT_SYMBOL(__mcfgpio_get_value);
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void __mcfgpio_set_value(unsigned gpio, int value)
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{
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if (gpio < MCFGPIO_SCR_START) {
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unsigned long flags;
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MCFGPIO_PORTTYPE data;
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local_irq_save(flags);
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data = mcfgpio_read(__mcfgpio_podr(gpio));
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if (value)
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data |= mcfgpio_bit(gpio);
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else
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data &= ~mcfgpio_bit(gpio);
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mcfgpio_write(data, __mcfgpio_podr(gpio));
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local_irq_restore(flags);
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} else {
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if (value)
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mcfgpio_write(mcfgpio_bit(gpio),
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MCFGPIO_SETR_PORT(gpio));
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else
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mcfgpio_write(~mcfgpio_bit(gpio),
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MCFGPIO_CLRR_PORT(gpio));
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}
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}
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EXPORT_SYMBOL(__mcfgpio_set_value);
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int __mcfgpio_direction_input(unsigned gpio)
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{
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unsigned long flags;
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MCFGPIO_PORTTYPE dir;
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local_irq_save(flags);
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dir = mcfgpio_read(__mcfgpio_pddr(gpio));
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dir &= ~mcfgpio_bit(gpio);
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mcfgpio_write(dir, __mcfgpio_pddr(gpio));
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local_irq_restore(flags);
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return 0;
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}
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EXPORT_SYMBOL(__mcfgpio_direction_input);
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int __mcfgpio_direction_output(unsigned gpio, int value)
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{
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unsigned long flags;
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MCFGPIO_PORTTYPE data;
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local_irq_save(flags);
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data = mcfgpio_read(__mcfgpio_pddr(gpio));
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data |= mcfgpio_bit(gpio);
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mcfgpio_write(data, __mcfgpio_pddr(gpio));
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/* now set the data to output */
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if (gpio < MCFGPIO_SCR_START) {
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data = mcfgpio_read(__mcfgpio_podr(gpio));
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if (value)
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data |= mcfgpio_bit(gpio);
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else
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data &= ~mcfgpio_bit(gpio);
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mcfgpio_write(data, __mcfgpio_podr(gpio));
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} else {
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if (value)
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mcfgpio_write(mcfgpio_bit(gpio),
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MCFGPIO_SETR_PORT(gpio));
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else
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mcfgpio_write(~mcfgpio_bit(gpio),
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MCFGPIO_CLRR_PORT(gpio));
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}
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local_irq_restore(flags);
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return 0;
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}
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EXPORT_SYMBOL(__mcfgpio_direction_output);
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int __mcfgpio_request(unsigned gpio)
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{
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return 0;
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}
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EXPORT_SYMBOL(__mcfgpio_request);
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void __mcfgpio_free(unsigned gpio)
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{
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__mcfgpio_direction_input(gpio);
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}
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EXPORT_SYMBOL(__mcfgpio_free);
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#ifdef CONFIG_GPIOLIB
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static int mcfgpio_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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return __mcfgpio_direction_input(offset);
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}
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static int mcfgpio_get_value(struct gpio_chip *chip, unsigned offset)
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{
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return !!__mcfgpio_get_value(offset);
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}
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static int mcfgpio_direction_output(struct gpio_chip *chip, unsigned offset,
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int value)
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{
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return __mcfgpio_direction_output(offset, value);
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}
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static void mcfgpio_set_value(struct gpio_chip *chip, unsigned offset,
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int value)
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{
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__mcfgpio_set_value(offset, value);
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}
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static int mcfgpio_request(struct gpio_chip *chip, unsigned offset)
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{
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return __mcfgpio_request(offset);
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}
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static void mcfgpio_free(struct gpio_chip *chip, unsigned offset)
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{
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__mcfgpio_free(offset);
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}
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static int mcfgpio_to_irq(struct gpio_chip *chip, unsigned offset)
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{
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#if defined(MCFGPIO_IRQ_MIN)
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if ((offset >= MCFGPIO_IRQ_MIN) && (offset < MCFGPIO_IRQ_MAX))
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#else
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if (offset < MCFGPIO_IRQ_MAX)
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#endif
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return MCFGPIO_IRQ_VECBASE + offset;
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else
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return -EINVAL;
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}
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static struct gpio_chip mcfgpio_chip = {
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.label = "mcfgpio",
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.request = mcfgpio_request,
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.free = mcfgpio_free,
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.direction_input = mcfgpio_direction_input,
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.direction_output = mcfgpio_direction_output,
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.get = mcfgpio_get_value,
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.set = mcfgpio_set_value,
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.to_irq = mcfgpio_to_irq,
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.base = 0,
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.ngpio = MCFGPIO_PIN_MAX,
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};
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static int __init mcfgpio_sysinit(void)
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{
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return gpiochip_add_data(&mcfgpio_chip, NULL);
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}
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core_initcall(mcfgpio_sysinit);
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#endif
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