| /* Copyright (c) 2015, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <reg.h> |
| #include <platform/gpio.h> |
| #include <platform/iomap.h> |
| |
| /* GPIO that controls the button |
| * for FASTBOOT. |
| */ |
| #define FASTBOOT_KEY_GPIO_ID 37 |
| |
| /* |
| * Returns fastboot button state. |
| * Returns 0 if button is not pressed, 1 when pressed. |
| */ |
| int get_fastboot_key_state(void) |
| { |
| int ret; |
| |
| gpio_tlmm_config(FASTBOOT_KEY_GPIO_ID, 0, GPIO_INPUT, GPIO_PULL_DOWN, GPIO_2MA, GPIO_ENABLE); |
| |
| ret = gpio_get_state(FASTBOOT_KEY_GPIO_ID); |
| |
| return ret; |
| } |
| |
| /* |
| * Return 1 to trigger to fastboot |
| */ |
| int fastboot_trigger(void) |
| { |
| int ret; |
| |
| ret = get_fastboot_key_state(); |
| |
| return (ret); |
| } |