+++ /dev/null
-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
-@@ -875,6 +875,18 @@ 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);
- }
-