0a12c5a017
This commit introduces mraa_gpio_init_by_name API for initializing a GPIO by its line name provided by the kernel. This feature depends on the GPIO chardev support and also the line names present in devicetree or board files. Accessing GPIO using its line name, removes the dependency from MRAA specific pin mapping and provides a cleaner way to access GPIOs. This will solve the issue created by an external gpiochip probing before the SoC's internal gpio controller and thereby making the MRAA pin mapping wrong. Currently, this API only supports initializing a single GPIO at a time. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
76 lines
3.2 KiB
C
76 lines
3.2 KiB
C
/*
|
|
* Author: Brendan Le Foll <brendan.le.foll@intel.com>
|
|
* Copyright (c) 2018 Intel Corporation.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include "mraa_internal.h"
|
|
#include "linux/gpio.h"
|
|
|
|
typedef struct {
|
|
int chip_fd;
|
|
struct gpiochip_info chip_info;
|
|
} mraa_gpiod_chip_info;
|
|
|
|
typedef struct gpioline_info mraa_gpiod_line_info;
|
|
|
|
void _mraa_free_gpio_groups(mraa_gpio_context dev);
|
|
void _mraa_close_gpio_event_handles(mraa_gpio_context dev);
|
|
void _mraa_close_gpio_desc(mraa_gpio_context dev);
|
|
int _mraa_gpiod_ioctl(int fd, unsigned long gpio_request, void* data);
|
|
|
|
mraa_gpiod_chip_info* mraa_get_chip_info_by_path(const char* path);
|
|
mraa_gpiod_chip_info* mraa_get_chip_info_by_name(const char* name);
|
|
mraa_gpiod_chip_info* mraa_get_chip_info_by_label(const char* label);
|
|
mraa_gpiod_chip_info* mraa_get_chip_info_by_number(unsigned number);
|
|
|
|
mraa_gpiod_line_info* mraa_get_line_info_from_descriptor(int chip_fd, unsigned line_number);
|
|
mraa_gpiod_line_info* mraa_get_line_info_by_chip_number(unsigned chip_number, unsigned line_number);
|
|
mraa_gpiod_line_info* mraa_get_line_info_by_chip_name(const char* chip_name, unsigned line_number);
|
|
mraa_gpiod_line_info* mraa_get_line_info_by_chip_label(const char* chip_label, unsigned line_number);
|
|
|
|
int mraa_get_lines_handle(int chip_fd, unsigned line_offsets[], unsigned num_lines, unsigned flags, unsigned default_value);
|
|
int mraa_set_line_values(int line_handle, unsigned int num_lines, unsigned char input_values[]);
|
|
int mraa_get_line_values(int line_handle, unsigned int num_lines, unsigned char output_values[]);
|
|
|
|
mraa_boolean_t mraa_is_gpio_line_kernel_owned(mraa_gpiod_line_info *linfo);
|
|
mraa_boolean_t mraa_is_gpio_line_dir_out(mraa_gpiod_line_info *linfo);
|
|
mraa_boolean_t mraa_is_gpio_line_active_low(mraa_gpiod_line_info *linfo);
|
|
mraa_boolean_t mraa_is_gpio_line_open_drain(mraa_gpiod_line_info *linfo);
|
|
mraa_boolean_t mraa_is_gpio_line_open_source(mraa_gpiod_line_info *linfo);
|
|
|
|
int mraa_get_number_of_gpio_chips();
|
|
int mraa_get_chip_infos(mraa_gpiod_chip_info*** cinfos);
|
|
|
|
/* Multiple gpio support. */
|
|
typedef struct _gpio_group* mraa_gpiod_group_t;
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|