mirror of
https://github.com/linux-msm/cdba.git
synced 2026-02-25 13:11:56 -08:00
Dmitry Baryshkov
b6c6807add
In order to stop clobbering the root directory, move all device and console backends to drivers/ subdir. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/*
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* Copyright (c) 2023, Linaro Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdbool.h>
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/* local-gpio implementation for libgpiod major version 1 */
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#include "local-gpio.h"
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#include <gpiod.h>
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int local_gpio_init(struct local_gpio *local_gpio)
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{
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int i;
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for (i = 0; i < GPIO_COUNT; ++i) {
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struct gpiod_line_request_config cfg;
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if (!local_gpio->options->gpios[i].present)
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continue;
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local_gpio->gpios[i].chip =
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gpiod_chip_open_lookup(local_gpio->options->gpios[i].chip);
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if (!local_gpio->gpios[i].chip) {
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err(1, "Unable to open gpiochip '%s'",
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local_gpio->options->gpios[i].chip);
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return -1;
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}
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cfg.consumer = "cdba";
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cfg.request_type = GPIOD_LINE_REQUEST_DIRECTION_OUTPUT;
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cfg.flags = 0;
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if (local_gpio->options->gpios[i].active_low)
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cfg.flags = GPIOD_LINE_REQUEST_FLAG_ACTIVE_LOW;
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local_gpio->gpios[i].line = gpiod_chip_get_line(local_gpio->gpios[i].chip,
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local_gpio->options->gpios[i].offset);
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if (!local_gpio->gpios[i].line) {
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err(1, "Unable to find gpio %d offset %u",
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i, local_gpio->options->gpios[i].offset);
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return -1;
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}
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if (gpiod_line_request(local_gpio->gpios[i].line, &cfg, 0)) {
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err(1, "Unable to request gpio %d offset %u",
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i, local_gpio->options->gpios[i].offset);
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return -1;
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}
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}
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return 0;
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}
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int local_gpio_set_value(struct local_gpio *local_gpio, unsigned int gpio, bool on)
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{
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return gpiod_line_set_value(local_gpio->gpios[gpio].line, on);
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}
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