6856535e29
The "linux,part-probe" dts parsing is a pretty neat generic feature. It has been posted to kernel.org and could easily be reused by all targets. This change moves the patch to the 3.18 and 4.1 generic folders, and makes the feature available to all platforms who may want to use it. Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> Acked-by: Hauke Mehrtens <hauke@hauke-m.de> SVN-Revision: 46654
71 lines
1.9 KiB
Diff
71 lines
1.9 KiB
Diff
--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -27,6 +27,11 @@ config MTD_SPLIT_FIRMWARE_NAME
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depends on MTD_SPLIT_FIRMWARE
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default "firmware"
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+config MTD_UIMAGE_SPLIT
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+ bool "Enable split support for firmware partitions containing a uImage"
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+ depends on MTD_SPLIT_FIRMWARE
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+ default y
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+
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source "drivers/mtd/mtdsplit/Kconfig"
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endmenu
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -696,6 +696,37 @@ mtd_pad_erasesize(struct mtd_info *mtd,
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return len;
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}
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+#define UBOOT_MAGIC 0x27051956
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+
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+static void split_uimage(struct mtd_info *master, struct mtd_part *part)
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+{
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+ struct {
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+ __be32 magic;
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+ __be32 pad[2];
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+ __be32 size;
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+ } hdr;
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+ size_t len;
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+
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+ if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
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+ return;
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+
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+ if (len != sizeof(hdr) || hdr.magic != cpu_to_be32(UBOOT_MAGIC))
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+ return;
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+
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+ len = be32_to_cpu(hdr.size) + 0x40;
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+ len = mtd_pad_erasesize(master, part->offset, len);
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+ if (len + master->erasesize > part->mtd.size)
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+ return;
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+
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+ if (config_enabled(CONFIG_MTD_SPLIT_UIMAGE_FW))
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+ pr_err("Dedicated partitioner didn't split firmware partition, please fill a bug report!\n");
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+ else
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+ pr_warn("Support for built-in firmware splitter will be removed, please use CONFIG_MTD_SPLIT_UIMAGE_FW\n");
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+
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+ __mtd_add_partition(master, "rootfs", part->offset + len,
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+ part->mtd.size - len, false);
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+}
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+
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#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
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#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
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#else
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@@ -704,7 +735,14 @@ mtd_pad_erasesize(struct mtd_info *mtd,
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static void split_firmware(struct mtd_info *master, struct mtd_part *part)
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{
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- run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
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+ int ret;
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+
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+ ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
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+ if (ret > 0)
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+ return;
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+
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+ if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
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+ split_uimage(master, part);
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}
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void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
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