| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #include <ddk/protocol/platform-device-lib.h> |
| #include <ddk/protocol/platform/device.h> |
| #include <ddktl/device.h> |
| #include <ddktl/mmio.h> |
| #include <fbl/mutex.h> |
| #include <hwreg/mmio.h> |
| |
| #include <optional> |
| |
| namespace thermal { |
| |
| // This class represents a generic PWM |
| // which provides interface to set the |
| // period and configure to appropriate |
| // duty cycle. |
| class AmlPwm { |
| |
| public: |
| DISALLOW_COPY_AND_ASSIGN_ALLOW_MOVE(AmlPwm); |
| AmlPwm(uint32_t period, uint32_t hwpwm) |
| : period_(period), hwpwm_(hwpwm){}; |
| zx_status_t Init(zx_device_t* parent); |
| zx_status_t Configure(uint32_t duty_cycle); |
| ~AmlPwm() = default; |
| |
| private: |
| uint32_t period_; |
| uint32_t duty_cycle_; |
| uint32_t hwpwm_; |
| uint32_t pwm_duty_cycle_offset_; |
| uint32_t enable_bit_; |
| uint32_t clk_enable_bit_; |
| pdev_protocol_t pdev_; |
| std::optional<ddk::MmioBuffer> pwm_mmio_; |
| fbl::Mutex pwm_lock_; |
| }; |
| } // namespace thermal |
