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56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Lochnagar internals
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*
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* Copyright (c) 2013-2018 Cirrus Logic, Inc. and
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* Cirrus Logic International Semiconductor Ltd.
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*
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* Author: Charles Keepax <ckeepax@opensource.cirrus.com>
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*/
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/regmap.h>
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#ifndef CIRRUS_LOCHNAGAR_H
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#define CIRRUS_LOCHNAGAR_H
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enum lochnagar_type {
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LOCHNAGAR1,
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LOCHNAGAR2,
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};
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/**
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* struct lochnagar - Core data for the Lochnagar audio board driver.
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*
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* @type: The type of Lochnagar device connected.
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* @dev: A pointer to the struct device for the main MFD.
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* @regmap: The devices main register map.
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* @analogue_config_lock: Lock used to protect updates in the analogue
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* configuration as these must not be changed whilst the hardware is processing
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* the last update.
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*/
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struct lochnagar {
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enum lochnagar_type type;
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struct device *dev;
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struct regmap *regmap;
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/* Lock to protect updates to the analogue configuration */
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struct mutex analogue_config_lock;
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};
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/* Register Addresses */
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#define LOCHNAGAR_SOFTWARE_RESET 0x00
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#define LOCHNAGAR_FIRMWARE_ID1 0x01
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#define LOCHNAGAR_FIRMWARE_ID2 0x02
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/* (0x0000) Software Reset */
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#define LOCHNAGAR_DEVICE_ID_MASK 0xFFFC
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#define LOCHNAGAR_DEVICE_ID_SHIFT 2
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#define LOCHNAGAR_REV_ID_MASK 0x0003
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#define LOCHNAGAR_REV_ID_SHIFT 0
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int lochnagar_update_config(struct lochnagar *lochnagar);
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#endif
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