From da37d096820e15b2bcdb0243da2dc01707c650f2 Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=B6rg=20Krause?= <joerg.krause@embedded.rocks>
Date: Sun, 14 Jan 2018 19:26:37 +0100
Subject: [PATCH] mtd: nand: export nand_get_flash_type function
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`nand_get_flash_type()` allows identification of supported NAND flashs.
The function is useful in SPL (like mxs_nand_spl.c) to lookup for a NAND
flash (which does not support ONFi) instead of using nand_simple.c and
hard-coding all required NAND parameters.
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
---
drivers/mtd/nand/nand_base.c | 3 ++-
include/linux/mtd/rawnand.h | 10 +++++++---
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index eb9f121f81..64e4621aaa 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3755,7 +3755,7 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
/*
* Get the flash and manufacturer id and lookup if the type is supported.
*/
-static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
+struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
struct nand_chip *chip,
int *maf_id, int *dev_id,
struct nand_flash_dev *type)
@@ -3927,6 +3927,7 @@ ident_done:
mtd->erasesize >> 10, mtd->writesize, mtd->oobsize);
return type;
}
+EXPORT_SYMBOL(nand_get_flash_type);
#if CONFIG_IS_ENABLED(OF_CONTROL)
DECLARE_GLOBAL_DATA_PTR;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 7fe553fc51..cdad7b85fa 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -22,9 +22,16 @@
#include <asm/cache.h>
struct mtd_info;
+struct nand_chip;
struct nand_flash_dev;
struct device_node;
+/* Get the flash and manufacturer id and lookup if the type is supported. */
+struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ int *maf_id, int *dev_id,
+ struct nand_flash_dev *type);
+
/* Scan and identify a NAND device */
int nand_scan(struct mtd_info *mtd, int max_chips);
/*
@@ -247,9 +254,6 @@ typedef enum {
#define NAND_CI_CELLTYPE_MSK 0x0C
#define NAND_CI_CELLTYPE_SHIFT 2
-/* Keep gcc happy */
-struct nand_chip;
-
/* ONFI features */
#define ONFI_FEATURE_16_BIT_BUS (1 << 0)
#define ONFI_FEATURE_EXT_PARAM_PAGE (1 << 7)
--
2.39.5