[PATCH 02/13] mtd: nand: pxa3xx: Allow to set/clear the 'spare enable' field

Ezequiel Garcia
2013-07-29T23:24:54Z

Some commands (such as the ONFI parameter page read) need to
clear the 'spare enable' bit. This commit allows to set/clear
depending on the prepared command, instead of having it always
set.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
---
drivers/mtd/nand/pxa3xx_nand.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 6f4b62d..b4d097f 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -174,6 +174,7 @@ struct pxa3xx_nand_info {
int cs;
int use_ecc; /* use HW ECC ? */
int use_dma; /* use DMA ? */
+ int use_spare; /* use spare ? */
int is_ready;

unsigned int page_size; /* page size of attached chip */
@@ -314,6 +315,11 @@ static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
else
ndcr &= ~NDCR_DMA_EN;

+ if (info->use_spare)
+ ndcr |= NDCR_SPARE_EN;
+ else
+ ndcr &= ~NDCR_SPARE_EN;
+
ndcr |= NDCR_ND_RUN;

/* clear status bits and run */
@@ -515,6 +521,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
info->buf_count = 0;
info->oob_size = 0;
info->use_ecc = 0;
+ info->use_spare = 1;
info->use_dma = (use_dma) ? 1 : 0;
info->is_ready = 0;
info->retcode = ERR_NONE;
--
1.8.1.5