Release 4.7 drivers/sbus/char/bbc_i2c.h

#ifndef _BBC_I2C_H

#define _BBC_I2C_H

#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/list.h>


struct bbc_i2c_client {
	
struct bbc_i2c_bus		*bp;
	
struct platform_device		*op;
	
int				bus;
	
int				address;
};







enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX };


struct bbc_cpu_temperature {
	
struct list_head		bp_list;
	
struct list_head		glob_list;

	
struct bbc_i2c_client		*client;
	
int				index;

	/* Current readings, and history. */
	
s8				curr_cpu_temp;
	
s8				curr_amb_temp;
	
s8				prev_cpu_temp;
	
s8				prev_amb_temp;
	
s8				avg_cpu_temp;
	
s8				avg_amb_temp;

	
int				sample_tick;

	
enum fan_action			fan_todo[2];

#define FAN_AMBIENT	0

#define FAN_CPU		1
};


struct bbc_fan_control {
	
struct list_head		bp_list;
	
struct list_head		glob_list;

	
struct bbc_i2c_client 		*client;
	
int 				index;

	
int				psupply_fan_on;
	
int				cpu_fan_speed;
	
int				system_fan_speed;
};


#define NUM_CHILDREN	8


struct bbc_i2c_bus {
	
struct bbc_i2c_bus		*next;
	
int				index;
	
spinlock_t			lock;
	
void				__iomem *i2c_bussel_reg;
	
void				__iomem *i2c_control_regs;
	

unsigned char			own, clock;

	
wait_queue_head_t		wq;
	
volatile int			waiting;

	
struct list_head		temps;
	
struct list_head		fans;

	
struct platform_device		*op;
	struct {
		
struct platform_device	*device;
		
int			client_claimed;
	} 
devs[NUM_CHILDREN];
};

/* Probing and attachment. */
extern struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int);
extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *);
extern void bbc_i2c_detach(struct bbc_i2c_client *);

/* Register read/write.  NOTE: Blocking! */
extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off);
extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off);
extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off);
extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off);

#endif /* _BBC_I2C_H */
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Directory: drivers/sbus/char

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