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mtd: nand: xway: remove manual reset

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nand_scan() already resets the NAND flash chip, this driver does not
have to call it manually. The xway_reset_chip() functions does the same
as the normal NAND reset function. The waiting for the NAND_WAIT_WR_C
is done in xway_cmd_ctrl().

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Hauke Mehrtens 2016-06-20 23:32:10 +02:00 committed by Boris Brezillon
parent f45eb7b522
commit 44772fa5ec
1 changed files with 0 additions and 20 deletions
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20
drivers/mtd/nand/xway_nand.c
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@ -35,7 +35,6 @@
#define NAND_CMD_CS BIT(4) /* chip select */
#define NAND_CMD_SE BIT(5) /* spare area access latch */
#define NAND_CMD_WP BIT(6) /* write protect */
#define NAND_WRITE_CMD_RESET 0xff
#define NAND_WRITE_CMD (NAND_CMD_CS | NAND_CMD_CLE)
#define NAND_WRITE_ADDR (NAND_CMD_CS | NAND_CMD_ALE)
#define NAND_WRITE_DATA (NAND_CMD_CS)
@ -68,22 +67,6 @@ struct xway_nand_data {
struct nand_chip chip;
};
static void xway_reset_chip(struct nand_chip *chip)
{
unsigned long nandaddr = (unsigned long) chip->IO_ADDR_W;
unsigned long flags;
nandaddr &= ~NAND_WRITE_ADDR;
nandaddr |= NAND_WRITE_CMD;
/* finish with a reset */
spin_lock_irqsave(&ebu_lock, flags);
writeb(NAND_WRITE_CMD_RESET, (void __iomem *) nandaddr);
while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0)
;
spin_unlock_irqrestore(&ebu_lock, flags);
}
static void xway_select_chip(struct mtd_info *mtd, int chip)
{
@ -199,9 +182,6 @@ static int xway_nand_probe(struct platform_device *pdev)
| NAND_CON_SE_P | NAND_CON_WP_P | NAND_CON_PRE_P
| cs_flag, EBU_NAND_CON);
/* finish with a reset */
xway_reset_chip(&data->chip);
/* Scan to find existence of the device */
err = nand_scan(mtd, 1);
if (err)