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e48a9d9c21
There is a logical difference between PWM controls for things like backlights and fan controls for actual fans. This change separates them into two different data structures, for better abstraction. BUG=chrome-os-partner:23530 BRANCH=none TEST=manual make runtests, make all boards, test on Link and Falco. Change-Id: Ib63f2d1518fcc2ee367f81bf5d803360c1aa5c76 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/175151
46 lines
992 B
C
46 lines
992 B
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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#ifndef __CROS_EC_PWM_H
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#define __CROS_EC_PWM_H
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/* The values are defined in board.h */
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enum pwm_channel;
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/**
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* Enable/disable a PWM channel.
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*/
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void pwm_enable(enum pwm_channel ch, int enabled);
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/**
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* Get PWM channel enabled status.
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*/
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int pwm_get_enabled(enum pwm_channel ch);
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/**
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* Set PWM channel duty cycle (0-100).
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*/
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void pwm_set_duty(enum pwm_channel ch, int percent);
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/**
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* Get PWM channel duty cycle.
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*/
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int pwm_get_duty(enum pwm_channel ch);
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/* Flags for PWM config table */
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/**
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* PWM output signal is inverted, so 100% duty means always low
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*/
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#define PWM_CONFIG_ACTIVE_LOW (1 << 0)
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/**
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* PWM channel has a fan controller with a tach input and can auto-adjust
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* its duty cycle to produce a given fan RPM.
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*/
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#define PWM_CONFIG_HAS_RPM_MODE (1 << 1)
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#endif /* __CROS_EC_PWM_H */
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