Author: rmilecki
Date: 2016-04-26 14:36:34 +0200 (Tue, 26 Apr 2016)
New Revision: 49259
Added:
trunk/target/linux/bcm53xx/patches-4.4/405-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch
Log:
bcm53xx: support JEDEC incompatible w25q128 in spi-nor
Signed-off-by: Rafa{U+0142} Mi{U+0142}ecki <[email protected]>
Added:
trunk/target/linux/bcm53xx/patches-4.4/405-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch
===================================================================
---
trunk/target/linux/bcm53xx/patches-4.4/405-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch
(rev 0)
+++
trunk/target/linux/bcm53xx/patches-4.4/405-mtd-spi-nor-detect-JEDEC-incompatible-w25q128-using-.patch
2016-04-26 12:36:34 UTC (rev 49259)
@@ -0,0 +1,34 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
+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 <[email protected]>
+---
+
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -869,6 +869,18 @@ static const struct flash_info *spi_nor_read_id(struct
spi_nor *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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