diff options
Diffstat (limited to 'drivers/mtd/nand/denali.c')
| -rw-r--r-- | drivers/mtd/nand/denali.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index 47cf37d..54718f4 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -10,7 +10,7 @@ #include <malloc.h> #include <nand.h> #include <linux/errno.h> -#include <asm/io.h> +#include <linux/io.h> #include "denali.h" @@ -433,17 +433,13 @@ static void find_valid_banks(struct denali_nand_info *denali) */ static void detect_max_banks(struct denali_nand_info *denali) { - uint32_t features = readl(denali->flash_reg + FEATURES); - /* - * Read the revision register, so we can calculate the max_banks - * properly: the encoding changed from rev 5.0 to 5.1 - */ - u32 revision = MAKE_COMPARABLE_REVISION( - readl(denali->flash_reg + REVISION)); - if (revision < REVISION_5_1) - denali->max_banks = 2 << (features & FEATURES__N_BANKS); - else - denali->max_banks = 1 << (features & FEATURES__N_BANKS); + uint32_t features = ioread32(denali->flash_reg + FEATURES); + + denali->max_banks = 1 << (features & FEATURES__N_BANKS); + + /* the encoding changed from rev 5.0 to 5.1 */ + if (denali->revision < 0x0501) + denali->max_banks <<= 1; } static void detect_partition_feature(struct denali_nand_info *denali) @@ -1154,6 +1150,13 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned int cmd, int col, static void denali_hw_init(struct denali_nand_info *denali) { /* + * The REVISION register may not be reliable. Platforms are allowed to + * override it. + */ + if (!denali->revision) + denali->revision = swab16(ioread32(denali->flash_reg + REVISION)); + + /* * tell driver how many bit controller will skip before writing * ECC code in OOB. This is normally used for bad block marker */ |