ed7c1a504e
The EN25QH256A variant of the EN25QH256 doesn't initialize correctly from SFDP alone and only accesses memory below 8m (addr_width is 4 but read_opcode takes only 3 bytes). Set SNOR_F_4B_OPCODES if the flash chip variant was detected using hwcaps. The fix submitted upstream uses the PARSE_SFDP initializer that is not available in the kernel used with Openwrt. Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>
50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
From 6abef37d16d0c570ef5a149e63762fba2a30804b Mon Sep 17 00:00:00 2001
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From: "Leon M. George" <leon@georgemail.eu>
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Date: Wed, 30 Mar 2022 16:16:56 +0200
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Subject: [PATCH] mtd: spi-nor: support eon en25qh256a variant
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The EN25QH256A variant of the EN25QH256 doesn't initialize correctly from SFDP
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alone and only accesses memory below 8m (addr_width is 4 but read_opcode takes
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only 3 bytes).
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Set SNOR_F_4B_OPCODES if the flash chip variant was detected using hwcaps.
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The fix submitted upstream uses the PARSE_SFDP initializer that is not
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available in the kernel used with Openwrt.
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Signed-off-by: Leon M. George <leon@georgemail.eu>
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---
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drivers/mtd/spi-nor/eon.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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--- a/drivers/mtd/spi-nor/eon.c
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+++ b/drivers/mtd/spi-nor/eon.c
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@@ -8,6 +8,16 @@
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#include "core.h"
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+static void en25qh256_post_sfdp_fixups(struct spi_nor *nor)
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+{
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+ if (nor->params->hwcaps.mask & SNOR_HWCAPS_READ_1_1_4)
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+ nor->flags |= SNOR_F_4B_OPCODES;
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+}
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+
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+static const struct spi_nor_fixups en25qh256_fixups = {
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+ .post_sfdp = en25qh256_post_sfdp_fixups,
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+};
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+
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static const struct flash_info eon_parts[] = {
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/* EON -- en25xxx */
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{ "en25f32", INFO(0x1c3116, 0, 64 * 1024, 64, SECT_4K) },
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@@ -23,7 +33,9 @@ static const struct flash_info eon_parts
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{ "en25qh64", INFO(0x1c7017, 0, 64 * 1024, 128,
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SECT_4K | SPI_NOR_DUAL_READ) },
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{ "en25qh128", INFO(0x1c7018, 0, 64 * 1024, 256, 0) },
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- { "en25qh256", INFO(0x1c7019, 0, 64 * 1024, 512, 0) },
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+ { "en25qh256", INFO(0x1c7019, 0, 64 * 1024, 512,
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+ SPI_NOR_DUAL_READ)
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+ .fixups = &en25qh256_fixups },
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{ "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128, SECT_4K) },
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};
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