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83b5fbddf2
mtd: spi-nor: locking support for MX25L6405D
Macronix MX25L6405D supports locking with four block-protection bits.
Currently, the driver only sets three bits. If the bootloader does not
sustain the flash chip in an unlocked state, the flash might be
non-writeable. Add the corresponding flag to enable locking support with
four bits in the status register.
mtd: spi-nor: disable 16-bit-sr for macronix
Macronix flash chips seem to consist of only one status register.
These chips will not work with the "16-bit Write Status (01h) Command".
Disable SNOR_F_HAS_16BIT_SR for all Macronix chips.
Refreshed:
- 0052-mtd-spi-nor-use-4-bit-locking-for-MX25L12805D.patch
Fixes: 15aa53d7ee ("ath79: switch to Kernel 5.10")
Signed-off-by: Nick Hainke <vincent@systemli.org>
34 lines
1.4 KiB
Diff
34 lines
1.4 KiB
Diff
From a449cd03db4d0e1d292b3734f7676634cfd94f53 Mon Sep 17 00:00:00 2001
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From: David Bauer <mail@david-bauer.net>
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Date: Sun, 25 Oct 2020 01:14:22 +0200
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Subject: [PATCH] mtd: spi-nor: use 4 bit locking for MX25L12805D
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Macronix MX25L12805D supports locking with 4 block
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protection bits in its status register. Add the corresponding
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flag in order to clear these bits when unloking the flash.
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Otherwise, the flash might not be writable depending on the state
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left by the bootloader.
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Tested-on: Ubiquiti UniFi AC Lite (ath79)
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Fixes commit 62593cf40b23 ("mtd: spi-nor: refactor block protection functions")
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Signed-off-by: David Bauer <mail@david-bauer.net>
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---
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drivers/mtd/spi-nor/macronix.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/mtd/spi-nor/macronix.c
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+++ b/drivers/mtd/spi-nor/macronix.c
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@@ -51,7 +51,8 @@ static const struct flash_info macronix_
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{ "mx25u4035", INFO(0xc22533, 0, 64 * 1024, 8, SECT_4K) },
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{ "mx25u8035", INFO(0xc22534, 0, 64 * 1024, 16, SECT_4K) },
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{ "mx25u6435f", INFO(0xc22537, 0, 64 * 1024, 128, SECT_4K) },
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- { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, SECT_4K) },
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+ { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, SECT_4K |
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+ SPI_NOR_HAS_LOCK | SPI_NOR_4BIT_BP) },
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{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
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{ "mx25r1635f", INFO(0xc22815, 0, 64 * 1024, 32,
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SECT_4K | SPI_NOR_DUAL_READ |
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