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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
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/* Copyright (c) 2012 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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/* PWM module for Chrome EC */
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#ifndef __CROS_EC_PWM_H
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#define __CROS_EC_PWM_H
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#include "common.h"
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/**
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* Enable/disable the fan.
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*
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* Should be called by whatever function enables the power supply to the fan.
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*/
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void pwm_enable_fan(int enable);
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/**
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* Enable/disable fan RPM control logic.
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*
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* @param rpm_mode Enable (1) or disable (0) RPM control loop; when
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* disabled, fan duty cycle will be used.
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*/
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void pwm_set_fan_rpm_mode(int enable);
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/**
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* Get the current fan RPM.
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*/
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int pwm_get_fan_rpm(void);
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/**
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* Get the target fan RPM.
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*/
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int pwm_get_fan_target_rpm(void);
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/**
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* Set the target fan RPM.
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*
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* @param rpm Target RPM; pass -1 to set fan to maximum.
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*/
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void pwm_set_fan_target_rpm(int rpm);
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/**
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* Set the fan PWM duty cycle (0-100), disabling the automatic control.
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*/
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void pwm_set_fan_duty(int percent);
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/**
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* Enable/disable the keyboard backlight.
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*/
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void pwm_enable_keyboard_backlight(int enable);
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/**
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* Get the keyboard backlight enable/disable status (1=enabled, 0=disabled).
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*/
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int pwm_get_keyboard_backlight_enabled(void);
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/**
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* Get the keyboard backlight percentage (0=off, 100=max).
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*/
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int pwm_get_keyboard_backlight(void);
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/**
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* Set the keyboard backlight percentage (0=off, 100=max).
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*/
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void pwm_set_keyboard_backlight(int percent);
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#endif /* __CROS_EC_PWM_H */
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