linux/mfd/mcp.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  *  linux/drivers/mfd/mcp.h
0004  *
0005  *  Copyright (C) 2001 Russell King, All Rights Reserved.
0006  */
0007 #ifndef MCP_H
0008 #define MCP_H
0009
0010 #include <linux/device.h>
0011
0012 struct mcp_ops;
0013
0014 struct mcp {
0015     struct module   *owner;
0016     struct mcp_ops  *ops;
0017     spinlock_t  lock;
0018     int     use_count;
0019     unsigned int    sclk_rate;
0020     unsigned int    rw_timeout;
0021     struct device   attached_device;
0022 };
0023
0024 struct mcp_ops {
0025     void        (*set_telecom_divisor)(struct mcp *, unsigned int);
0026     void        (*set_audio_divisor)(struct mcp *, unsigned int);
0027     void        (*reg_write)(struct mcp *, unsigned int, unsigned int);
0028     unsigned int    (*reg_read)(struct mcp *, unsigned int);
0029     void        (*enable)(struct mcp *);
0030     void        (*disable)(struct mcp *);
0031 };
0032
0033 void mcp_set_telecom_divisor(struct mcp *, unsigned int);
0034 void mcp_set_audio_divisor(struct mcp *, unsigned int);
0035 void mcp_reg_write(struct mcp *, unsigned int, unsigned int);
0036 unsigned int mcp_reg_read(struct mcp *, unsigned int);
0037 void mcp_enable(struct mcp *);
0038 void mcp_disable(struct mcp *);
0039 #define mcp_get_sclk_rate(mcp)  ((mcp)->sclk_rate)
0040
0041 struct mcp *mcp_host_alloc(struct device *, size_t);
0042 int mcp_host_add(struct mcp *, void *);
0043 void mcp_host_del(struct mcp *);
0044 void mcp_host_free(struct mcp *);
0045
0046 struct mcp_driver {
0047     struct device_driver drv;
0048     int (*probe)(struct mcp *);
0049     void (*remove)(struct mcp *);
0050 };
0051
0052 int mcp_driver_register(struct mcp_driver *);
0053 void mcp_driver_unregister(struct mcp_driver *);
0054
0055 #define mcp_get_drvdata(mcp)    dev_get_drvdata(&(mcp)->attached_device)
0056 #define mcp_set_drvdata(mcp,d)  dev_set_drvdata(&(mcp)->attached_device, d)
0057
0058 static inline void *mcp_priv(struct mcp *mcp)
0059 {
0060     return mcp + 1;
0061 }
0062
0063 #endif