mirror of https://github.com/torvalds/linux.git
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* virtio_rtc internal interfaces
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*
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* Copyright (C) 2022-2023 OpenSynergy GmbH
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* Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#ifndef _VIRTIO_RTC_INTERNAL_H_
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#define _VIRTIO_RTC_INTERNAL_H_
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/ptp_clock_kernel.h>
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#include <linux/types.h>
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/* driver core IFs */
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struct viortc_dev;
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int viortc_read(struct viortc_dev *viortc, u16 vio_clk_id, u64 *reading);
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int viortc_read_cross(struct viortc_dev *viortc, u16 vio_clk_id, u8 hw_counter,
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u64 *reading, u64 *cycles);
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int viortc_cross_cap(struct viortc_dev *viortc, u16 vio_clk_id, u8 hw_counter,
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bool *supported);
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int viortc_read_alarm(struct viortc_dev *viortc, u16 vio_clk_id,
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u64 *alarm_time, bool *enabled);
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int viortc_set_alarm(struct viortc_dev *viortc, u16 vio_clk_id, u64 alarm_time,
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bool alarm_enable);
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int viortc_set_alarm_enabled(struct viortc_dev *viortc, u16 vio_clk_id,
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bool alarm_enable);
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struct viortc_class;
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struct viortc_class *viortc_class_from_dev(struct device *dev);
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/* PTP IFs */
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struct viortc_ptp_clock;
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#if IS_ENABLED(CONFIG_VIRTIO_RTC_PTP)
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struct viortc_ptp_clock *viortc_ptp_register(struct viortc_dev *viortc,
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struct device *parent_dev,
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u16 vio_clk_id,
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const char *ptp_clock_name);
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int viortc_ptp_unregister(struct viortc_ptp_clock *vio_ptp,
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struct device *parent_dev);
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#else
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static inline struct viortc_ptp_clock *
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viortc_ptp_register(struct viortc_dev *viortc, struct device *parent_dev,
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u16 vio_clk_id, const char *ptp_clock_name)
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{
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return NULL;
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}
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static inline int viortc_ptp_unregister(struct viortc_ptp_clock *vio_ptp,
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struct device *parent_dev)
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{
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return -ENODEV;
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}
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#endif
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/* HW counter IFs */
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/**
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* viortc_hw_xtstamp_params() - get HW-specific xtstamp params
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* @hw_counter: virtio_rtc HW counter type
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* @cs_id: clocksource id corresponding to hw_counter
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*
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* Gets the HW-specific xtstamp params. Returns an error if the driver cannot
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* support xtstamp.
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*
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* Context: Process context.
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* Return: Zero on success, negative error code otherwise.
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*/
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int viortc_hw_xtstamp_params(u8 *hw_counter, enum clocksource_ids *cs_id);
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/* RTC class IFs */
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#if IS_ENABLED(CONFIG_VIRTIO_RTC_CLASS)
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void viortc_class_alarm(struct viortc_class *viortc_class, u16 vio_clk_id);
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void viortc_class_stop(struct viortc_class *viortc_class);
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int viortc_class_register(struct viortc_class *viortc_class);
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struct viortc_class *viortc_class_init(struct viortc_dev *viortc,
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u16 vio_clk_id, bool have_alarm,
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struct device *parent_dev);
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#else /* CONFIG_VIRTIO_RTC_CLASS */
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static inline void viortc_class_alarm(struct viortc_class *viortc_class,
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u16 vio_clk_id)
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{
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}
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static inline void viortc_class_stop(struct viortc_class *viortc_class)
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{
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}
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static inline int viortc_class_register(struct viortc_class *viortc_class)
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{
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return -ENODEV;
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}
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static inline struct viortc_class *viortc_class_init(struct viortc_dev *viortc,
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u16 vio_clk_id,
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bool have_alarm,
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struct device *parent_dev)
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{
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return ERR_PTR(-ENODEV);
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}
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#endif /* CONFIG_VIRTIO_RTC_CLASS */
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#endif /* _VIRTIO_RTC_INTERNAL_H_ */
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