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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>
103 lines
2.2 KiB
C
103 lines
2.2 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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#ifndef coldfire_gpio_h
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#define coldfire_gpio_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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/*
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* The Generic GPIO functions
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*
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* If the gpio is a compile time constant and is one of the Coldfire gpios,
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* use the inline version, otherwise dispatch thru gpiolib.
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*/
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static inline int gpio_get_value(unsigned gpio)
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{
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if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX)
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return mcfgpio_read(__mcfgpio_ppdr(gpio)) & mcfgpio_bit(gpio);
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else
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return __gpio_get_value(gpio);
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}
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static inline void gpio_set_value(unsigned gpio, int value)
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{
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if (__builtin_constant_p(gpio) && gpio < MCFGPIO_PIN_MAX) {
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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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} else
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__gpio_set_value(gpio, value);
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}
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static inline int gpio_to_irq(unsigned gpio)
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{
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#if defined(MCFGPIO_IRQ_MIN)
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if ((gpio >= MCFGPIO_IRQ_MIN) && (gpio < MCFGPIO_IRQ_MAX))
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#else
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if (gpio < MCFGPIO_IRQ_MAX)
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#endif
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return gpio + MCFGPIO_IRQ_VECBASE;
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else
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return __gpio_to_irq(gpio);
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}
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static inline int irq_to_gpio(unsigned irq)
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{
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return (irq >= MCFGPIO_IRQ_VECBASE &&
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irq < (MCFGPIO_IRQ_VECBASE + MCFGPIO_IRQ_MAX)) ?
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irq - MCFGPIO_IRQ_VECBASE : -ENXIO;
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}
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static inline int gpio_cansleep(unsigned gpio)
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{
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return gpio < MCFGPIO_PIN_MAX ? 0 : __gpio_cansleep(gpio);
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}
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#ifndef CONFIG_GPIOLIB
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static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
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{
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int err;
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err = gpio_request(gpio, label);
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if (err)
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return err;
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if (flags & GPIOF_DIR_IN)
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err = gpio_direction_input(gpio);
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else
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err = gpio_direction_output(gpio,
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(flags & GPIOF_INIT_HIGH) ? 1 : 0);
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if (err)
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gpio_free(gpio);
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return err;
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}
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#endif /* !CONFIG_GPIOLIB */
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#endif
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