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f2b56fcb9f
GPIO alternate functions used to be configured throughout the code,
which made it hard to tell which ones you needed to configure yourself
in board.c. It also sometimes (chip/lm4/i2c.c) led to GPIOs being
configured as alternate functions even if they weren't used on a given
board.
With this change, every board has a table in board.c which lists ALL
GPIOs which have alternate functions. This is now the only place
where alternate functions are configured. Each module then calls
gpio_init_module() to set up its GPIOs.
This also fixes a bug where gpio_set_flags() ignored most of the flags
passed to it (only direction and level were actually used).
On stm32f, gpio_set_alternate() does not exist, and pins are
configured via direct register writes from board.c. Rather than
attempt to change that in the same CL, I've stubbed out
gpio_set_alternate() for stm32f, and will fix the register writes in a
follow-up CL.
BUG=chrome-os-partner:21618
BRANCH=peppy (fixes I2C1 being initialized even though those pins are used
for other things)
TEST=boot link, falco, pit, spring
Change-Id: I40f47025d8f767e0723c6b40c80413af9ba8deba
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/64400
41 lines
772 B
C
41 lines
772 B
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 "common.h"
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#include "gpio.h"
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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 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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/* Nothing */
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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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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(int port, int mask, int func)
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{
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/* Nothing */
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}
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