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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
77 lines
2.1 KiB
Diff
77 lines
2.1 KiB
Diff
--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -18,6 +18,11 @@ config MTD_ROOTFS_ROOT_DEV
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bool "Automatically set 'rootfs' partition to be root filesystem"
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default y
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+config MTD_ROOTFS_SPLIT
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+ bool "Automatically split 'rootfs' partition for squashfs"
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+ select MTD_SPLIT
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+ default y
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+
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config MTD_SPLIT_FIRMWARE
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bool "Automatically split firmware partition for kernel+rootfs"
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default y
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -696,6 +696,47 @@ mtd_pad_erasesize(struct mtd_info *mtd,
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return len;
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}
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+static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
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+{
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+ size_t squashfs_len;
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+ int len, ret;
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+
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+ ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
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+ if (ret)
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+ return ret;
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+
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+ len = mtd_pad_erasesize(master, offset, squashfs_len);
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+ *split_offset = offset + len;
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+
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+ return 0;
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+}
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+
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+static void split_rootfs_data(struct mtd_info *master, struct mtd_part *part)
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+{
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+ unsigned int split_offset = 0;
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+ unsigned int split_size;
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+ int ret;
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+
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+ ret = split_squashfs(master, part->offset, &split_offset);
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+ if (ret)
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+ return;
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+
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+ if (split_offset <= 0)
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+ return;
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+
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+ if (config_enabled(CONFIG_MTD_SPLIT_SQUASHFS_ROOT))
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+ pr_err("Dedicated partitioner didn't create \"rootfs_data\" partition, please fill a bug report!\n");
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+ else
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+ pr_warn("Support for built-in \"rootfs_data\" splitter will be removed, please use CONFIG_MTD_SPLIT_SQUASHFS_ROOT\n");
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+
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+ split_size = part->mtd.size - (split_offset - part->offset);
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+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
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+ ROOTFS_SPLIT_NAME, split_offset, split_size);
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+
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+ __mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
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+ split_size, false);
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+}
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+
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#define UBOOT_MAGIC 0x27051956
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static void split_uimage(struct mtd_info *master, struct mtd_part *part)
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@@ -758,7 +799,10 @@ static void mtd_partition_split(struct m
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return;
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if (!strcmp(part->mtd.name, "rootfs")) {
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- run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
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+ int num = run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
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+
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+ if (num <= 0 && config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
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+ split_rootfs_data(master, part);
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rootfs_found = 1;
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}
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