[PATCH] I2C: Add PXA I2C driver

Add support for the I2C PXA driver.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

1 files changed, 48 insertions, 0 deletions

diff --git a/include/linux/i2c-pxa.h b/include/linux/i2c-pxa.h
new file mode 100644
index 0000000..5f3eaf8
--- /dev/null
+++ b/include/linux/i2c-pxa.h
@@ -0,0 +1,48 @@
+#ifndef _LINUX_I2C_ALGO_PXA_H
+#define _LINUX_I2C_ALGO_PXA_H
+
+struct i2c_eeprom_emu_watcher {
+	void (*write)(void *, unsigned int addr, unsigned char newval);
+};
+
+struct i2c_eeprom_emu_watch {
+	struct list_head node;
+	unsigned int start;
+	unsigned int end;
+	struct i2c_eeprom_emu_watcher *ops;
+	void *data;
+};
+
+#define I2C_EEPROM_EMU_SIZE (256)
+
+struct i2c_eeprom_emu {
+	unsigned int size;
+	unsigned int ptr;
+	unsigned int seen_start;
+	struct list_head watch;
+
+	unsigned char bytes[I2C_EEPROM_EMU_SIZE];
+};
+
+typedef enum i2c_slave_event_e {
+	I2C_SLAVE_EVENT_START_READ,
+	I2C_SLAVE_EVENT_START_WRITE,
+	I2C_SLAVE_EVENT_STOP
+} i2c_slave_event_t;
+
+struct i2c_slave_client {
+	void *data;
+	void (*event)(void *ptr, i2c_slave_event_t event);
+	int  (*read) (void *ptr);
+	void (*write)(void *ptr, unsigned int val);
+};
+
+extern int i2c_eeprom_emu_addwatcher(struct i2c_eeprom_emu *, void *data,
+				     unsigned int addr, unsigned int size,
+				     struct i2c_eeprom_emu_watcher *);
+
+extern void i2c_eeprom_emu_delwatcher(struct i2c_eeprom_emu *, void *data, struct i2c_eeprom_emu_watcher *watcher);
+
+extern struct i2c_eeprom_emu *i2c_pxa_get_eeprom(void);
+
+#endif /* _LINUX_I2C_ALGO_PXA_H */