[PATCH] I2C: Add PXA I2C driver

Add support for the I2C PXA driver.

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

2 files changed, 49 insertions, 0 deletions

diff --git a/include/linux/i2c-id.h b/include/linux/i2c-id.h
index 89270ce51470..74d6dc942715 100644
--- a/include/linux/i2c-id.h
+++ b/include/linux/i2c-id.h
@@ -203,6 +203,7 @@
 #define I2C_ALGO_MV64XXX 0x190000       /* Marvell mv64xxx i2c ctlr     */
 #define I2C_ALGO_PCA    0x1a0000        /* PCA 9564 style adapters      */
 #define I2C_ALGO_AU1550 0x1b0000        /* Au1550 PSC algorithm         */
+#define I2C_ALGO_PXA    0x1c0000        /* Intel PXA I2C algorithm      */
 
 #define I2C_ALGO_EXP    0x800000        /* experimental                 */
 
diff --git a/include/linux/i2c-pxa.h b/include/linux/i2c-pxa.h
new file mode 100644
index 000000000000..5f3eaf802223
--- /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 */