forked from Openwrt-EcoNet/openwrt
166d9d5ea2
Fix patches and refresh for Linux 6.12. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
48 lines
1.8 KiB
Diff
48 lines
1.8 KiB
Diff
From 30a04cf5b6ffa1249df72ccd98cef05f37890f89 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Thu, 6 Feb 2025 05:07:20 +0000
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Subject: [PATCH] mtd: spinand: add work-around to prevent bootloader wiping
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mtdparts
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ASUS makes use of U-Boot's fdt_fixup_mtdparts() function which applies
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the partitions defined in U-Boot's mtdparts and mtdids environment
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variables to the devicetree passed over to Linux.
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The undesired side-effect is that in this way also all additional
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properties and child nodes get wiped, preventing NVMEM cells to be
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defined for MTD partitions or UBI volumes.
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To work-around this issue, add an additional compatible string
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'u-boot-dont-touch-spi-nand' which can be used instead of 'spi-nand' in
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case the replacement of the MTD partitions by U-Boot should be skipped
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alltogether.
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In practise this is mostly relevant for SPI-NAND which anyway comes only
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with two partitions nowadays: 'Bootloader' and 'UBI_DEV'. Hence this
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work-around is applicable for SPI-NAND only. Similar work-arounds for
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other MTD devices can be created as well should they actually be needed.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/mtd/nand/spi/core.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/mtd/nand/spi/core.c
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+++ b/drivers/mtd/nand/spi/core.c
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@@ -1619,6 +1619,7 @@ static int spinand_remove(struct spi_mem
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static const struct spi_device_id spinand_ids[] = {
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{ .name = "spi-nand" },
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+ { .name = "u-boot-dont-touch-spi-nand" },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(spi, spinand_ids);
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@@ -1626,6 +1627,7 @@ MODULE_DEVICE_TABLE(spi, spinand_ids);
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#ifdef CONFIG_OF
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static const struct of_device_id spinand_of_ids[] = {
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{ .compatible = "spi-nand" },
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+ { .compatible = "u-boot-dont-touch-spi-nand" },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, spinand_of_ids);
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