v4.19.13 snapshot.
diff --git a/include/linux/i2c-pxa.h b/include/linux/i2c-pxa.h
new file mode 100644
index 0000000..a897e2b
--- /dev/null
+++ b/include/linux/i2c-pxa.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_I2C_ALGO_PXA_H
+#define _LINUX_I2C_ALGO_PXA_H
+
+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);
+};
+
+#endif /* _LINUX_I2C_ALGO_PXA_H */