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https://github.com/Telecominfraproject/OpenCellular.git
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7f3ed512db
For historical reasons on LM4, we defined GPIO_INT_F_BOTH separately from GPIO_INT_F_RISING and GPIO_INT_F_FALLING. This means that the code has weird checks like BOTH || (RISING && FALLING), which have propagated in error-prone ways across the other chips. Instead, explcitly define BOTH to be RISING|FALLING. Ideally, we would have called it GPIO_INT_EDGE to match GPIO_INT_LEVEL, but changing that now would be a big find-replace. Which might still be a good idea, but that is best done in its own CL. BUG=chrome-os-partner:24204 BRANCH=none TEST=build and boot pit, spring, and link; that covers STM32F, STM32L, and LM4. Change-Id: I23ba05a3f41bb14b09af61dc52a178f710f5c1bb Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/177643 Reviewed-by: Jeremy Thorpe <jeremyt@chromium.org> Reviewed-by: Vic Yang <victoryang@chromium.org>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* GPIO module for emulator */
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#include "console.h"
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#include "common.h"
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#include "gpio.h"
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#include "timer.h"
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#include "util.h"
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static int gpio_values[GPIO_COUNT];
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static int gpio_interrupt_enabled[GPIO_COUNT];
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test_mockable void gpio_pre_init(void)
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{
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/* Nothing */
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}
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test_mockable int gpio_get_level(enum gpio_signal signal)
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{
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return gpio_values[signal];
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}
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static int gpio_interrupt_check(uint32_t flags, int old, int new)
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{
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if ((flags & GPIO_INT_F_RISING) && old == 0 && new == 1)
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return 1;
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if ((flags & GPIO_INT_F_FALLING) && old == 1 && new == 0)
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return 1;
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if ((flags & GPIO_INT_F_LOW) && new == 0)
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return 1;
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if ((flags & GPIO_INT_F_HIGH) && new == 1)
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return 1;
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return 0;
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}
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test_mockable void gpio_set_level(enum gpio_signal signal, int value)
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{
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const struct gpio_info *g = gpio_list + signal;
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const uint32_t flags = g->flags;
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const int old_value = gpio_values[signal];
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gpio_values[signal] = value;
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if (g->irq_handler == NULL || !gpio_interrupt_enabled[signal])
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return;
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if (gpio_interrupt_check(flags, old_value, value))
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g->irq_handler(signal);
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}
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test_mockable int gpio_enable_interrupt(enum gpio_signal signal)
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{
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gpio_interrupt_enabled[signal] = 1;
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return EC_SUCCESS;
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}
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test_mockable void gpio_set_flags_by_mask(uint32_t port, uint32_t mask,
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uint32_t flags)
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{
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/* Nothing */
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}
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test_mockable void gpio_set_alternate_function(uint32_t port, uint32_t mask,
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int func)
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{
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/* Nothing */
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}
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