74d00a8c38
* properly format/comment all patches * merge debloat patches * merge Kconfig patches * merge swconfig patches * merge hotplug patches * drop 200-fix_localversion.patch - upstream * drop 222-arm_zimage_none.patch - unused * drop 252-mv_cesa_depends.patch - no longer required * drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused * drop 661-fq_codel_keep_dropped_stats.patch - outdated * drop 702-phy_add_aneg_done_function.patch - upstream * drop 840-rtc7301.patch - unused * drop 841-rtc_pt7c4338.patch - upstream * drop 921-use_preinit_as_init.patch - unused * drop spio-gpio-old and gpio-mmc - unused Signed-off-by: John Crispin <john@phrozen.org>
132 lines
3.9 KiB
Diff
132 lines
3.9 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Subject: make rootfs split/detection more generic - patch can be moved to generic-2.6 after testing on other platforms
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lede-commit: 328e660b31f0937d52c5ae3d6e7029409918a9df
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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drivers/mtd/Kconfig | 17 +++++++++++++++++
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drivers/mtd/mtdpart.c | 35 +++++++++++++++++++++++++++++++++++
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include/linux/mtd/partitions.h | 2 ++
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3 files changed, 54 insertions(+)
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diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
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index 5a2d71729b9a..f5ac04e288eb 100644
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--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -12,6 +12,23 @@ menuconfig MTD
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if MTD
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+menu "OpenWrt specific MTD options"
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+
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+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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+
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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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+
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+config MTD_SPLIT_FIRMWARE_NAME
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+ string "Firmware partition name"
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+ depends on MTD_SPLIT_FIRMWARE
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+ default "firmware"
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+
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+endmenu
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+
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config MTD_TESTS
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tristate "MTD tests support (DANGEROUS)"
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depends on m
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diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
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index dd86b430e46e..33d152d1876a 100644
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -29,10 +29,12 @@
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#include <linux/kmod.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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+#include <linux/magic.h>
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#include <linux/of.h>
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#include <linux/err.h>
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#include "mtdcore.h"
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+#include "mtdsplit/mtdsplit.h"
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/* Our partition linked list */
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static LIST_HEAD(mtd_partitions);
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@@ -52,6 +54,8 @@ struct mtd_part {
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struct list_head list;
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};
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+static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part);
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+
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/*
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* Given a pointer to the MTD object in the mtd_part structure, we can retrieve
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* the pointer to that structure.
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@@ -678,6 +682,7 @@ int mtd_add_partition(struct mtd_info *parent, const char *name,
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mutex_unlock(&mtd_partitions_mutex);
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add_mtd_device(&new->mtd);
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+ mtd_partition_split(parent, new);
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mtd_add_partition_attrs(new);
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@@ -756,6 +761,35 @@ int mtd_del_partition(struct mtd_info *mtd, int partno)
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}
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EXPORT_SYMBOL_GPL(mtd_del_partition);
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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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+#define SPLIT_FIRMWARE_NAME "unused"
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+#endif
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+
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+static void split_firmware(struct mtd_info *master, struct mtd_part *part)
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+{
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+}
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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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+ int offset, int size)
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+{
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+}
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+
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+static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
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+{
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+ static int rootfs_found = 0;
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+
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+ if (rootfs_found)
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+ return;
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+
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+ if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
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+ IS_ENABLED(CONFIG_MTD_SPLIT_FIRMWARE))
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+ split_firmware(master, part);
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+
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+ arch_split_mtd_part(master, part->mtd.name, part->offset,
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+ part->mtd.size);
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+}
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/*
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* This function, given a master MTD object and a partition table, creates
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* and registers slave MTD objects which are bound to the master according to
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@@ -787,6 +821,7 @@ int add_mtd_partitions(struct mtd_info *master,
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mutex_unlock(&mtd_partitions_mutex);
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add_mtd_device(&slave->mtd);
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+ mtd_partition_split(master, slave);
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mtd_add_partition_attrs(slave);
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if (parts[i].types)
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mtd_parse_part(slave, parts[i].types);
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diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
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index c4beb70dacbd..320a791290c5 100644
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--- a/include/linux/mtd/partitions.h
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+++ b/include/linux/mtd/partitions.h
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@@ -109,5 +109,7 @@ int mtd_add_partition(struct mtd_info *master, const char *name,
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long long offset, long long length);
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int mtd_del_partition(struct mtd_info *master, int partno);
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uint64_t mtd_get_device_size(const struct mtd_info *mtd);
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+extern void __weak arch_split_mtd_part(struct mtd_info *master,
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+ const char *name, int offset, int size);
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#endif
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--
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2.11.0
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