OpenWrt
/branches/18.06.1/target/linux/bcm53xx/patches-4.14/400-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch |
@@ -0,0 +1,34 @@ |
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 |
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Some w25q128 chipsets don't support RDID (0x9f) command, they reply with |
0xff-s only. To suppose such flashes fallback to the 0x90 command. |
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com> |
--- |
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--- a/drivers/mtd/spi-nor/spi-nor.c |
+++ b/drivers/mtd/spi-nor/spi-nor.c |
@@ -1222,6 +1222,18 @@ static const struct flash_info *spi_nor_ |
} |
dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %02x, %02x\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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