422dcafe47
Lochnagar is an evaluation and development board for Cirrus Logic Smart CODEC and Amp devices. It allows the connection of most Cirrus Logic devices on mini-cards, as well as allowing connection of various application processor systems to provide a full evaluation platform. This driver supports the board controller chip on the Lochnagar board. Audio system topology, clocking and power can all be controlled through the Lochnagar controller chip, allowing the device under test to be used in a variety of possible use cases. As the Lochnagar is a fairly complex device this MFD driver allows the drivers for the various features to be bound in. Initially clocking, regulator and pinctrl will be added as these are necessary to configure the system. But in time at least audio and voltage/current monitoring will also be added. Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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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