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path: root/drivers/sbus/char/bbc_i2c.h
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Diffstat (limited to 'drivers/sbus/char/bbc_i2c.h')
-rw-r--r--drivers/sbus/char/bbc_i2c.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/sbus/char/bbc_i2c.h b/drivers/sbus/char/bbc_i2c.h
new file mode 100644
index 000000000..4b4531066
--- /dev/null
+++ b/drivers/sbus/char/bbc_i2c.h
@@ -0,0 +1,85 @@
+#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 */