1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _BBC_I2C_H 3*4882a593Smuzhiyun #define _BBC_I2C_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/of.h> 6*4882a593Smuzhiyun #include <linux/of_device.h> 7*4882a593Smuzhiyun #include <linux/list.h> 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun struct bbc_i2c_client { 10*4882a593Smuzhiyun struct bbc_i2c_bus *bp; 11*4882a593Smuzhiyun struct platform_device *op; 12*4882a593Smuzhiyun int bus; 13*4882a593Smuzhiyun int address; 14*4882a593Smuzhiyun }; 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX }; 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun struct bbc_cpu_temperature { 19*4882a593Smuzhiyun struct list_head bp_list; 20*4882a593Smuzhiyun struct list_head glob_list; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun struct bbc_i2c_client *client; 23*4882a593Smuzhiyun int index; 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* Current readings, and history. */ 26*4882a593Smuzhiyun s8 curr_cpu_temp; 27*4882a593Smuzhiyun s8 curr_amb_temp; 28*4882a593Smuzhiyun s8 prev_cpu_temp; 29*4882a593Smuzhiyun s8 prev_amb_temp; 30*4882a593Smuzhiyun s8 avg_cpu_temp; 31*4882a593Smuzhiyun s8 avg_amb_temp; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun int sample_tick; 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun enum fan_action fan_todo[2]; 36*4882a593Smuzhiyun #define FAN_AMBIENT 0 37*4882a593Smuzhiyun #define FAN_CPU 1 38*4882a593Smuzhiyun }; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun struct bbc_fan_control { 41*4882a593Smuzhiyun struct list_head bp_list; 42*4882a593Smuzhiyun struct list_head glob_list; 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun struct bbc_i2c_client *client; 45*4882a593Smuzhiyun int index; 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun int psupply_fan_on; 48*4882a593Smuzhiyun int cpu_fan_speed; 49*4882a593Smuzhiyun int system_fan_speed; 50*4882a593Smuzhiyun }; 51*4882a593Smuzhiyun 52*4882a593Smuzhiyun #define NUM_CHILDREN 8 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun struct bbc_i2c_bus { 55*4882a593Smuzhiyun struct bbc_i2c_bus *next; 56*4882a593Smuzhiyun int index; 57*4882a593Smuzhiyun spinlock_t lock; 58*4882a593Smuzhiyun void __iomem *i2c_bussel_reg; 59*4882a593Smuzhiyun void __iomem *i2c_control_regs; 60*4882a593Smuzhiyun unsigned char own, clock; 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun wait_queue_head_t wq; 63*4882a593Smuzhiyun volatile int waiting; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun struct list_head temps; 66*4882a593Smuzhiyun struct list_head fans; 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun struct platform_device *op; 69*4882a593Smuzhiyun struct { 70*4882a593Smuzhiyun struct platform_device *device; 71*4882a593Smuzhiyun int client_claimed; 72*4882a593Smuzhiyun } devs[NUM_CHILDREN]; 73*4882a593Smuzhiyun }; 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun /* Probing and attachment. */ 76*4882a593Smuzhiyun extern struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int); 77*4882a593Smuzhiyun extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *); 78*4882a593Smuzhiyun extern void bbc_i2c_detach(struct bbc_i2c_client *); 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun /* Register read/write. NOTE: Blocking! */ 81*4882a593Smuzhiyun extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off); 82*4882a593Smuzhiyun extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off); 83*4882a593Smuzhiyun extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off); 84*4882a593Smuzhiyun extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off); 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun #endif /* _BBC_I2C_H */ 87