Hi,

Checking all nand chip is necessary and some of NAND host implement cmd_ctrl() from cmdfunc( ). The select_chip() is required.

=============================================================================== diff --git a/cmd/nand.c b/cmd/nand.c index 5b9d4b3..a7c781a 100644 --- a/cmd/nand.c +++ b/cmd/nand.c @@ -156,13 +156,18 @@ static void do_nand_status(nand_info_t *nand) ulong block_start = 0; ulong off; int last_status = -1; + int chipnr;

struct nand_chip *nand_chip = nand->priv; /* check the WP bit */ - nand_chip->cmdfunc(nand, NAND_CMD_STATUS, -1, -1); - printf("device is %swrite protected\n", - (nand_chip->read_byte(nand) & 0x80 ? - "NOT " : "")); + for (chipnr = 0; chipnr < nand_chip->numchips; chipnr++) { + nand_chip->select_chip(nand, chipnr); + nand_chip->cmdfunc(nand, NAND_CMD_STATUS, -1, -1); + printf("device %d is %swrite protected\n", chipnr, + (nand_chip->read_byte(nand) & 0x80 ? + "NOT " : "")); + nand_chip->select_chip(nand, -1); + }

for (off = 0; off < nand->size; off += nand->erasesize) { int s = nand_get_lock_status(nand, off); ======================================================================

Thanks & Best Regards, Mason Yang Macronix International Co., Ltd

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Macronix International Co., Ltd.

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This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation.

Macronix International Co., Ltd.

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