forked from mirrors/linux
91db931194
[why] if dynamic allocation fails during gpio_open, it will cause crash due to page fault. [how] handle allocation when gpio object gets created and prevent from calling gpio_open if allocation failed Signed-off-by: Su Sung Chung <Su.Chung@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
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* Copyright 2012-15 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#ifndef __DAL_GPIO_INTERFACE_H__
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#define __DAL_GPIO_INTERFACE_H__
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#include "gpio_types.h"
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#include "grph_object_defs.h"
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struct gpio;
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/* Open the handle for future use */
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enum gpio_result dal_gpio_open(
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struct gpio *gpio,
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enum gpio_mode mode);
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enum gpio_result dal_gpio_open_ex(
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struct gpio *gpio,
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enum gpio_mode mode);
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/* Get high or low from the pin */
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enum gpio_result dal_gpio_get_value(
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const struct gpio *gpio,
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uint32_t *value);
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/* Set pin high or low */
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enum gpio_result dal_gpio_set_value(
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const struct gpio *gpio,
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uint32_t value);
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/* Get current mode */
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enum gpio_mode dal_gpio_get_mode(
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const struct gpio *gpio);
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/* Change mode of the handle */
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enum gpio_result dal_gpio_change_mode(
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struct gpio *gpio,
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enum gpio_mode mode);
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/* Lock Pin */
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enum gpio_result dal_gpio_lock_pin(
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struct gpio *gpio);
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/* Unlock Pin */
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enum gpio_result dal_gpio_unlock_pin(
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struct gpio *gpio);
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/* Get the GPIO id */
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enum gpio_id dal_gpio_get_id(
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const struct gpio *gpio);
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/* Get the GPIO enum */
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uint32_t dal_gpio_get_enum(
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const struct gpio *gpio);
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/* Set the GPIO pin configuration */
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enum gpio_result dal_gpio_set_config(
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struct gpio *gpio,
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const struct gpio_config_data *config_data);
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/* Obtain GPIO pin info */
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enum gpio_result dal_gpio_get_pin_info(
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const struct gpio *gpio,
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struct gpio_pin_info *pin_info);
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/* Obtain GPIO sync source */
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enum sync_source dal_gpio_get_sync_source(
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const struct gpio *gpio);
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/* Obtain GPIO pin output state (active low or active high) */
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enum gpio_pin_output_state dal_gpio_get_output_state(
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const struct gpio *gpio);
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struct hw_ddc *dal_gpio_get_ddc(struct gpio *gpio);
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struct hw_hpd *dal_gpio_get_hpd(struct gpio *gpio);
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struct hw_generic *dal_gpio_get_generic(struct gpio *gpio);
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/* Close the handle */
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void dal_gpio_close(
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struct gpio *gpio);
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#endif
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