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| author | Brian Norris <computersforpeace@gmail.com> | 2014-05-06 00:46:16 +0530 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-06-06 17:46:01 -0400 |
| commit | b9ae609fdbb7f8149a13bb9c67006b7237cbf83e (patch) | |
| tree | 78a9f137ddfbb17b32b684f863bd13d60c867518 /drivers | |
| parent | 3f990dc83bc3197b17bd847241671917826152cc (diff) | |
| download | blackbird-obmc-uboot-b9ae609fdbb7f8149a13bb9c67006b7237cbf83e.tar.gz blackbird-obmc-uboot-b9ae609fdbb7f8149a13bb9c67006b7237cbf83e.zip | |
mtd: nand: don't use read_buf for 8-bit ONFI transfers
Porting below commit from linux-tree, preserving original authorship & commit log
commit bd9c6e99b58255b9de1982711ac9487c9a2f18be
Author: Brian Norris <computersforpeace@gmail.com>
mtd: nand: don't use read_buf for 8-bit ONFI transfers
Use a repeated read_byte() instead of read_buf(), since for x16 buswidth
devices, we need to avoid the upper I/O[16:9] bits. See the following
commit for reference:
commit 05f7835975dad6b3b517f9e23415985e648fb875 (from linux-tree)
Author: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Thu Dec 5 22:22:04 2013 +0100
mtd: nand: don't use {read,write}_buf for 8-bit transfers
Now, I think that all barriers to probing ONFI on x16 devices are
removed, so remove the check from nand_flash_detect_onfi().
Signed-off-by: Pekon Gupta <pekon@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 1ce55fde8b..5d3232c634 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2582,7 +2582,7 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, int *busw) { struct nand_onfi_params *p = &chip->onfi_params; - int i; + int i, j; int val; /* Try ONFI for unknown chip or LP */ @@ -2593,7 +2593,8 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1); for (i = 0; i < 3; i++) { - chip->read_buf(mtd, (uint8_t *)p, sizeof(*p)); + for (j = 0; j < sizeof(*p); j++) + ((uint8_t *)p)[j] = chip->read_byte(mtd); if (onfi_crc16(ONFI_CRC_BASE, (uint8_t *)p, 254) == le16_to_cpu(p->crc)) { pr_info("ONFI param page %d valid\n", i); |
