1 files changed, 86 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..c2d066d3f
--- /dev/null
+++ b/drivers/sbus/char/bbc_i2c.h
@@ -0,0 +1,86 @@
+/* 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 */