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This driver permits controlling local (on the system) gpios by using the libgpiod library. Support for gpiod v1 and v2 is added, and parses the options via the yaml parser. This can be tested with the gpio-sim module: https://docs.kernel.org/admin-guide/gpio/gpio-sim.html Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
64 lines
2.2 KiB
C
64 lines
2.2 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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#ifndef _LOCAL_GPIO_H_
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#define _LOCAL_GPIO_H_
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enum {
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GPIO_POWER = 0, // Power input enable
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GPIO_FASTBOOT_KEY, // Usually volume key
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GPIO_POWER_KEY, // Key to power the device
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GPIO_USB_DISCONNECT, // Simulate main USB connection
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GPIO_COUNT
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};
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struct local_gpio_options {
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struct {
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char *chip;
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bool present;
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unsigned int offset;
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bool active_low;
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} gpios[GPIO_COUNT];
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};
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struct local_gpio {
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struct local_gpio_options *options;
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struct {
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void *chip;
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void *line;
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} gpios[GPIO_COUNT];
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};
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int local_gpio_init(struct local_gpio *local_gpio);
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int local_gpio_set_value(struct local_gpio *local_gpio, unsigned int gpio, bool on);
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#endif /* _LOCAL_GPIO_H_ */
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