38 lines
871 B
C
38 lines
871 B
C
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/* Copyright 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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/* STM32-specific PWM module for Chrome EC */
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#ifndef __CROS_EC_PWM_CHIP_H
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#define __CROS_EC_PWM_CHIP_H
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/* Data structure to define PWM channels. */
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struct pwm_t {
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/*
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* Timer powering the PWM channel. Must use STM32_TIM(x) to
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* initialize
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*/
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struct {
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int id;
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uintptr_t base;
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} tim;
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/* Channel ID within the timer */
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int channel;
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/* PWM channel flags. See include/pwm.h */
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uint32_t flags;
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/* PWM frequency (Hz) */
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int frequency;
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};
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extern const struct pwm_t pwm_channels[];
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/* Macro to fill in both timer ID and register base */
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#define STM32_TIM(x) {x, STM32_TIM_BASE(x)}
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/* Plain ID mapping for readability */
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#define STM32_TIM_CH(x) (x)
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#endif /* __CROS_EC_PWM_CHIP_H */
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