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generic: mtd: backport mx25u25635f stateless 4b support 

Use the stateless 4-byte op codes for this flash chip to fix reboot
hangs on SoCs expecting the flash chip in 3-byte mode.

Fixes: FS#179

Signed-off-by: Mathias Kresin <dev@kresin.me>
owl
Mathias Kresin 2017-04-11 19:46:16 +02:00
parent e209988a17
commit 226e194335
2 changed files with 30 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
target/linux/generic/patches-4.9/063-mtd-spi-nor-enable-stateless-4b-op-codes-for-mx25u25.patch Normal file
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@ -0,0 +1,29 @@
From b0fcb4b413028376894feaaaf62bcb09ab1b52f2 Mon Sep 17 00:00:00 2001
From: Mathias Kresin <dev@kresin.me>
Date: Thu, 13 Apr 2017 09:23:54 +0200
Subject: [PATCH] mtd: spi-nor: enable stateless 4b op codes for mx25u25635f
All required stateless 4-byte op codes are supported by this flash
chip. The stateless 4-byte support can't be autodetected due to a
missing 4-byte Address Instruction Table in SFDP.
Fixes hangs on reboot for SoCs expecting the flash chip in 3byte mode.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
---
drivers/mtd/spi-nor/spi-nor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1017,7 +1017,7 @@ static const struct flash_info spi_nor_i
{ "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
{ "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
- { "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K) },
+ { "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
{ "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_QUAD_READ) },
{ "mx66l1g55g", INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },

2
target/linux/ipq806x/patches-4.9/105-mtd-nor-add-mx25l25635f.patch
View File

@ -17,6 +17,6 @@ the ubi volume created by the other.
{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
- { "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
+ { "mx25l25635f", INFO(0xc22019, 0, 64 * 1024, 512, SECT_4K) },
{ "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K) },
{ "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
{ "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_QUAD_READ) },