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- From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
- Subject: [PATCH] mtd: spi-nor: detect JEDEC incompatible w25q128 using 0x90
- command
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- Some w25q128 chipsets don't support RDID (0x9f) command, they reply with
- 0xff-s only. To suppose such flashes fallback to the 0x90 command.
- Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
- ---
- --- a/drivers/mtd/spi-nor/spi-nor.c
- +++ b/drivers/mtd/spi-nor/spi-nor.c
- @@ -881,6 +881,18 @@ static const struct flash_info *spi_nor_
- }
- dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %2x, %2x\n",
- id[0], id[1], id[2]);
- +
- + tmp = nor->read_reg(nor, 0x90, id, SPI_NOR_MAX_ID_LEN);
- + if (tmp < 0) {
- + dev_dbg(nor->dev, " error %d reading JEDEC ID\n", tmp);
- + return ERR_PTR(tmp);
- + }
- + dev_info(nor->dev, "using Read Manufacturer / Device ID command (0x%02x) returned %02x %02x\n",
- + 0x90, id[0x03], id[0x04]);
- + if (id[0x03] == 0xef && id[0x04] == 0x17) {
- + return spi_nor_match_id("w25q128");
- + }
- +
- return ERR_PTR(-ENODEV);
- }
-
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