v4.19.13 snapshot.
diff --git a/include/linux/fsi.h b/include/linux/fsi.h
new file mode 100644
index 0000000..ec3be0d
--- /dev/null
+++ b/include/linux/fsi.h
@@ -0,0 +1,93 @@
+/* FSI device & driver interfaces
+ *
+ * Copyright (C) IBM Corporation 2016
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef LINUX_FSI_H
+#define LINUX_FSI_H
+
+#include <linux/device.h>
+
+struct fsi_device {
+ struct device dev;
+ u8 engine_type;
+ u8 version;
+ u8 unit;
+ struct fsi_slave *slave;
+ uint32_t addr;
+ uint32_t size;
+};
+
+extern int fsi_device_read(struct fsi_device *dev, uint32_t addr,
+ void *val, size_t size);
+extern int fsi_device_write(struct fsi_device *dev, uint32_t addr,
+ const void *val, size_t size);
+extern int fsi_device_peek(struct fsi_device *dev, void *val);
+
+struct fsi_device_id {
+ u8 engine_type;
+ u8 version;
+};
+
+#define FSI_VERSION_ANY 0
+
+#define FSI_DEVICE(t) \
+ .engine_type = (t), .version = FSI_VERSION_ANY,
+
+#define FSI_DEVICE_VERSIONED(t, v) \
+ .engine_type = (t), .version = (v),
+
+struct fsi_driver {
+ struct device_driver drv;
+ const struct fsi_device_id *id_table;
+};
+
+#define to_fsi_dev(devp) container_of(devp, struct fsi_device, dev)
+#define to_fsi_drv(drvp) container_of(drvp, struct fsi_driver, drv)
+
+extern int fsi_driver_register(struct fsi_driver *fsi_drv);
+extern void fsi_driver_unregister(struct fsi_driver *fsi_drv);
+
+/* module_fsi_driver() - Helper macro for drivers that don't do
+ * anything special in module init/exit. This eliminates a lot of
+ * boilerplate. Each module may only use this macro once, and
+ * calling it replaces module_init() and module_exit()
+ */
+#define module_fsi_driver(__fsi_driver) \
+ module_driver(__fsi_driver, fsi_driver_register, \
+ fsi_driver_unregister)
+
+/* direct slave API */
+extern int fsi_slave_claim_range(struct fsi_slave *slave,
+ uint32_t addr, uint32_t size);
+extern void fsi_slave_release_range(struct fsi_slave *slave,
+ uint32_t addr, uint32_t size);
+extern int fsi_slave_read(struct fsi_slave *slave, uint32_t addr,
+ void *val, size_t size);
+extern int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,
+ const void *val, size_t size);
+
+extern struct bus_type fsi_bus_type;
+extern const struct device_type fsi_cdev_type;
+
+enum fsi_dev_type {
+ fsi_dev_cfam,
+ fsi_dev_sbefifo,
+ fsi_dev_scom,
+ fsi_dev_occ
+};
+
+extern int fsi_get_new_minor(struct fsi_device *fdev, enum fsi_dev_type type,
+ dev_t *out_dev, int *out_index);
+extern void fsi_free_minor(dev_t dev);
+
+#endif /* LINUX_FSI_H */