[U-Boot] [PATCH v9 01/30] mtd: nand: Introduce CONFIG_SYS_NAND_BUSWIDTH_16BIT

Benoît Thébaudeau
2013-03-06T18:59:07Z

From: Fabio Estevam <fabio.estevam@freescale.com>

Introduce CONFIG_SYS_NAND_BUSWIDTH_16BIT option so that other NAND controller
drivers could use it when a 16-bit NAND is deployed.

drivers/mtd/nand/ndfc has CONFIG_SYS_NDFC_16BIT, so just rename it, so that
other NAND drivers could reuse the same symbol.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
---
Changes in v9: None
Changes in v8:
- New patch.

Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

README | 9 ++++++---
drivers/mtd/nand/ndfc.c | 4 ++--
2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/README b/README
index d8cb394..830c45e 100644
--- a/README
+++ b/README
@@ -3713,9 +3713,12 @@ Low Level (hardware related) configuration options:
- CONFIG_SYS_SRIOn_MEM_SIZE:
Size of SRIO port 'n' memory region

-- CONFIG_SYS_NDFC_16
- Defined to tell the NDFC that the NAND chip is using a
- 16 bit bus.
+- CONFIG_SYS_NAND_BUSWIDTH_16BIT
+ Defined to tell the NAND controller that the NAND chip is using
+ a 16 bit bus.
+ Not all NAND drivers use this symbol.
+ Example of driver that uses it:
+ - drivers/mtd/nand/ndfc.c

- CONFIG_SYS_NDFC_EBC0_CFG
Sets the EBC0_CFG register for the NDFC. If not defined
diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c
index 6ebbb5e..213d2c9 100644
--- a/drivers/mtd/nand/ndfc.c
+++ b/drivers/mtd/nand/ndfc.c
@@ -156,7 +156,7 @@ static uint8_t ndfc_read_byte(struct mtd_info *mtd)

struct nand_chip *chip = mtd->priv;

-#ifdef CONFIG_SYS_NDFC_16BIT
+#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
return (uint8_t) readw(chip->IO_ADDR_R);
#else
return readb(chip->IO_ADDR_R);
@@ -218,7 +218,7 @@ int board_nand_init(struct nand_chip *nand)
nand->ecc.bytes = 3;
nand->select_chip = ndfc_select_chip;

-#ifdef CONFIG_SYS_NDFC_16BIT
+#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
nand->options |= NAND_BUSWIDTH_16;
#endif

--
1.7.10.4