[PATCH v3 04/12] mtd: rawnand: introduce struct onfi_helper

[Shivamurthy Shastri (sshivamurthy)]

Create onfi_helper object. This is base to turn ONFI code to generic.

Signed-off-by: Shivamurthy Shastri <sshivamurthy@xxxxxxxxxx>
---
 include/linux/mtd/nand.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 3cdf06cae8b6..645dde4c5797 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -11,6 +11,7 @@
 #define __LINUX_MTD_NAND_H
 
 #include <linux/mtd/mtd.h>
+#include <linux/mtd/onfi.h>
 
 /**
  * struct nand_memory_organization - Memory organization structure
@@ -157,6 +158,24 @@ struct nand_ops {
 	bool (*isbad)(struct nand_device *nand, const struct nand_pos *pos);
 };
 
+/**
+ * struct onfi_helper - ONFI helper functions that should be implemented by
+ * specialized layers (raw NAND, SPI NAND, etc.)
+ * @page: Page number for ONFI parameter table
+ * @check_revision: Check ONFI revision number
+ * @parameter_page_read: Function to read parameter pages
+ * @init_intf_data: Initialize interface specific data or fixups
+ */
+struct onfi_helper {
+	u8 page;
+	int (*check_revision)(struct nand_device *base,
+			      struct nand_onfi_params *p, int *onfi_version);
+	int (*parameter_page_read)(struct nand_device *base, u8 page,
+				   void *buf, unsigned int len);
+	int (*init_intf_data)(struct nand_device *base,
+			      struct nand_onfi_params *p);
+};
+
 /**
  * struct nand_device - NAND device
  * @mtd: MTD instance attached to the NAND device
@@ -165,6 +184,7 @@ struct nand_ops {
  * @rowconv: position to row address converter
  * @bbt: bad block table info
  * @ops: NAND operations attached to the NAND device
+ * @helper: Helper functions to detect and initialize ONFI NAND
  *
  * Generic NAND object. Specialized NAND layers (raw NAND, SPI NAND, OneNAND)
  * should declare their own NAND object embedding a nand_device struct (that's
@@ -183,6 +203,7 @@ struct nand_device {
 	struct nand_row_converter rowconv;
 	struct nand_bbt bbt;
 	const struct nand_ops *ops;
+	struct onfi_helper helper;
 };
 
 /**
-- 
2.17.1