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-rw-r--r--arch/arm/mach-davinci/include/mach/nand.h8
-rw-r--r--arch/arm/plat-s3c/include/plat/nand.h31
2 files changed, 25 insertions, 14 deletions
diff --git a/arch/arm/mach-davinci/include/mach/nand.h b/arch/arm/mach-davinci/include/mach/nand.h
index aa482841270b..b520c4b5678a 100644
--- a/arch/arm/mach-davinci/include/mach/nand.h
+++ b/arch/arm/mach-davinci/include/mach/nand.h
@@ -68,10 +68,14 @@ struct davinci_nand_pdata { /* platform_data */
/* none == NAND_ECC_NONE (strongly *not* advised!!)
* soft == NAND_ECC_SOFT
- * 1-bit == NAND_ECC_HW
- * 4-bit == NAND_ECC_HW_SYNDROME (not on all chips)
+ * else == NAND_ECC_HW, according to ecc_bits
+ *
+ * All DaVinci-family chips support 1-bit hardware ECC.
+ * Newer ones also support 4-bit ECC, but are awkward
+ * using it with large page chips.
*/
nand_ecc_modes_t ecc_mode;
+ u8 ecc_bits;
/* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
unsigned options;
diff --git a/arch/arm/plat-s3c/include/plat/nand.h b/arch/arm/plat-s3c/include/plat/nand.h
index f4dcd14af059..18f958801e64 100644
--- a/arch/arm/plat-s3c/include/plat/nand.h
+++ b/arch/arm/plat-s3c/include/plat/nand.h
@@ -10,19 +10,26 @@
* published by the Free Software Foundation.
*/
-/* struct s3c2410_nand_set
+/**
+ * struct s3c2410_nand_set - define a set of one or more nand chips
+ * @disable_ecc: Entirely disable ECC - Dangerous
+ * @flash_bbt: Openmoko u-boot can create a Bad Block Table
+ * Setting this flag will allow the kernel to
+ * look for it at boot time and also skip the NAND
+ * scan.
+ * @nr_chips: Number of chips in this set
+ * @nr_partitions: Number of partitions pointed to by @partitions
+ * @name: Name of set (optional)
+ * @nr_map: Map for low-layer logical to physical chip numbers (option)
+ * @partitions: The mtd partition list
*
- * define an set of one or more nand chips registered with an unique mtd
- *
- * nr_chips = number of chips in this set
- * nr_partitions = number of partitions pointed to be partitoons (or zero)
- * name = name of set (optional)
- * nr_map = map for low-layer logical to physical chip numbers (option)
- * partitions = mtd partition list
-*/
-
+ * define a set of one or more nand chips registered with an unique mtd. Also
+ * allows to pass flag to the underlying NAND layer. 'disable_ecc' will trigger
+ * a warning at boot time.
+ */
struct s3c2410_nand_set {
- unsigned int disable_ecc : 1;
+ unsigned int disable_ecc:1;
+ unsigned int flash_bbt:1;
int nr_chips;
int nr_partitions;
@@ -39,7 +46,7 @@ struct s3c2410_platform_nand {
int twrph0; /* active time for nWE/nOE */
int twrph1; /* time for release CLE/ALE from nWE/nOE inactive */
- unsigned int ignore_unset_ecc : 1;
+ unsigned int ignore_unset_ecc:1;
int nr_sets;
struct s3c2410_nand_set *sets;