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authorRafał Miłecki <rafal@milecki.pl>2017-12-29 23:09:32 +0100
committerRafał Miłecki <rafal@milecki.pl>2017-12-29 23:15:32 +0100
commitfea884ff51cc2ed1016b4e13a9fcc728bd4f357e (patch)
tree9c5020c0f6caba74d85f2a558da725f5dbc19ee3 /target/linux/bcm53xx/patches-4.14/400-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch
parent4dd51788dd2fad52dc328ea08ff118a42f6dfa54 (diff)
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bcm53xx: add early support for kernel 4.14
Don't switch to it by default yet as it requires more testing. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/bcm53xx/patches-4.14/400-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch')
-rw-r--r--target/linux/bcm53xx/patches-4.14/400-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch34
1 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.14/400-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch b/target/linux/bcm53xx/patches-4.14/400-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch
new file mode 100644
index 0000000..7510526
--- /dev/null
+++ b/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
+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
+@@ -1205,6 +1205,18 @@ 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);
+ }
+