forked from mirrors/linux
8e8e69d67e
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation version 2 of the license this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 100 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.918357685@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
172 lines
3.7 KiB
C
172 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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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