mtd: nand: add common DT init code

These are already-documented common bindings for NAND chips. Let's
handle them in nand_base.

If NAND controller drivers need to act on this data before bringing up
the NAND chip (e.g., fill out ECC callback functions, change HW modes,
etc.), then they can do so between calling nand_scan_ident() and
nand_scan_tail().

Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 6c51876941f3..f25e2bdd188c 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -26,6 +26,8 @@
 
 struct mtd_info;
 struct nand_flash_dev;
+struct device_node;
+
 /* Scan and identify a NAND device */
 extern int nand_scan(struct mtd_info *mtd, int max_chips);
 /*
@@ -542,6 +544,7 @@ struct nand_buffers {
  *                      flash device
  * @IO_ADDR_W:          [BOARDSPECIFIC] address to write the 8 I/O lines of the
  *                      flash device.
+ * @dn:                 [BOARDSPECIFIC] device node describing this instance
  * @read_byte:          [REPLACEABLE] read one byte from the chip
  * @read_word:          [REPLACEABLE] read one word from the chip
  * @write_byte:         [REPLACEABLE] write a single byte to the chip on the
@@ -644,6 +647,8 @@ struct nand_chip {
         void __iomem *IO_ADDR_R;
         void __iomem *IO_ADDR_W;
 
+        struct device_node *dn;
+
         uint8_t (*read_byte)(struct mtd_info *mtd);
         u16 (*read_word)(struct mtd_info *mtd);
         void (*write_byte)(struct mtd_info *mtd, uint8_t byte);