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86 lines
2.0 KiB
86 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _BBC_I2C_H |
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#define _BBC_I2C_H |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/list.h> |
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struct bbc_i2c_client { |
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struct bbc_i2c_bus *bp; |
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struct platform_device *op; |
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int bus; |
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int address; |
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}; |
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enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX }; |
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struct bbc_cpu_temperature { |
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struct list_head bp_list; |
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struct list_head glob_list; |
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struct bbc_i2c_client *client; |
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int index; |
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/* Current readings, and history. */ |
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s8 curr_cpu_temp; |
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s8 curr_amb_temp; |
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s8 prev_cpu_temp; |
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s8 prev_amb_temp; |
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s8 avg_cpu_temp; |
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s8 avg_amb_temp; |
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int sample_tick; |
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enum fan_action fan_todo[2]; |
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#define FAN_AMBIENT 0 |
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#define FAN_CPU 1 |
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}; |
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struct bbc_fan_control { |
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struct list_head bp_list; |
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struct list_head glob_list; |
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struct bbc_i2c_client *client; |
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int index; |
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int psupply_fan_on; |
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int cpu_fan_speed; |
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int system_fan_speed; |
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}; |
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#define NUM_CHILDREN 8 |
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struct bbc_i2c_bus { |
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struct bbc_i2c_bus *next; |
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int index; |
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spinlock_t lock; |
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void __iomem *i2c_bussel_reg; |
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void __iomem *i2c_control_regs; |
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unsigned char own, clock; |
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wait_queue_head_t wq; |
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volatile int waiting; |
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struct list_head temps; |
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struct list_head fans; |
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struct platform_device *op; |
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struct { |
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struct platform_device *device; |
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int client_claimed; |
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} devs[NUM_CHILDREN]; |
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}; |
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/* Probing and attachment. */ |
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extern struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int); |
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extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *); |
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extern void bbc_i2c_detach(struct bbc_i2c_client *); |
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/* Register read/write. NOTE: Blocking! */ |
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extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off); |
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extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off); |
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extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off); |
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extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off); |
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#endif /* _BBC_I2C_H */
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