/* SPDX-License-Identifier: GPL-2.0 */ #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 */