diff options
Diffstat (limited to 'include/linux/mfd/lochnagar.h')
| -rw-r--r-- | include/linux/mfd/lochnagar.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/linux/mfd/lochnagar.h b/include/linux/mfd/lochnagar.h new file mode 100644 index 000000000000..ff9e64cfc9fb --- /dev/null +++ b/include/linux/mfd/lochnagar.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Lochnagar internals + * + * Copyright (c) 2013-2018 Cirrus Logic, Inc. and + * Cirrus Logic International Semiconductor Ltd. + * + * Author: Charles Keepax <ckeepax@opensource.cirrus.com> + */ + +#include <linux/device.h> +#include <linux/mutex.h> +#include <linux/regmap.h> + +#ifndef CIRRUS_LOCHNAGAR_H +#define CIRRUS_LOCHNAGAR_H + +enum lochnagar_type { + LOCHNAGAR1, + LOCHNAGAR2, +}; + +/** + * struct lochnagar - Core data for the Lochnagar audio board driver. + * + * @type: The type of Lochnagar device connected. + * @dev: A pointer to the struct device for the main MFD. + * @regmap: The devices main register map. + * @analogue_config_lock: Lock used to protect updates in the analogue + * configuration as these must not be changed whilst the hardware is processing + * the last update. + */ +struct lochnagar { + enum lochnagar_type type; + struct device *dev; + struct regmap *regmap; + + /* Lock to protect updates to the analogue configuration */ + struct mutex analogue_config_lock; +}; + +/* Register Addresses */ +#define LOCHNAGAR_SOFTWARE_RESET 0x00 +#define LOCHNAGAR_FIRMWARE_ID1 0x01 +#define LOCHNAGAR_FIRMWARE_ID2 0x02 + +/* (0x0000) Software Reset */ +#define LOCHNAGAR_DEVICE_ID_MASK 0xFFFC +#define LOCHNAGAR_DEVICE_ID_SHIFT 2 +#define LOCHNAGAR_REV_ID_MASK 0x0003 +#define LOCHNAGAR_REV_ID_SHIFT 0 + +int lochnagar_update_config(struct lochnagar *lochnagar); + +#endif |