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fdt_gpio.h revision 1.1 
      1 /*	$NetBSD: fdt_gpio.h,v 1.1 2025/09/06 20:11:30 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _DEV_FDT_FDT_GPIO_H_
     30 #define	_DEV_FDT_FDT_GPIO_H_
     31 
     32 #include <sys/device.h>
     33 #include <sys/gpio.h>
     34 
     35 struct fdtbus_gpio_controller;
     36 
     37 struct fdtbus_gpio_pin {
     38 	struct fdtbus_gpio_controller *gp_gc;
     39 	void *gp_priv;
     40 };
     41 
     42 struct fdtbus_gpio_controller_func {
     43 	void *	(*acquire)(device_t, const void *, size_t, int);
     44 	void	(*release)(device_t, void *);
     45 	int	(*read)(device_t, void *, bool);
     46 	void	(*write)(device_t, void *, int, bool);
     47 };
     48 
     49 int		fdtbus_register_gpio_controller(device_t, int,
     50 		    const struct fdtbus_gpio_controller_func *);
     51 
     52 int		fdtbus_gpio_count(int, const char *);
     53 struct fdtbus_gpio_pin *
     54 		fdtbus_gpio_acquire(int, const char *, int);
     55 struct fdtbus_gpio_pin *
     56 		fdtbus_gpio_acquire_index(int, const char *, int, int);
     57 void		fdtbus_gpio_release(struct fdtbus_gpio_pin *);
     58 int		fdtbus_gpio_read(struct fdtbus_gpio_pin *);
     59 void		fdtbus_gpio_write(struct fdtbus_gpio_pin *, int);
     60 int		fdtbus_gpio_read_raw(struct fdtbus_gpio_pin *);
     61 void		fdtbus_gpio_write_raw(struct fdtbus_gpio_pin *, int);
     62 
     63 #endif /* _DEV_FDT_FDT_GPIO_H_ */
     64