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
146 lines
4 KiB
Diff
146 lines
4 KiB
Diff
--- 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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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -29,11 +29,13 @@
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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 <linux/kconfig.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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@@ -47,13 +49,14 @@ 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 with this macro.
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*/
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#define PART(x) ((struct mtd_part *)(x))
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-
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/*
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* MTD methods which simply translate the effective address and pass through
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* to the _real_ device.
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@@ -579,8 +582,10 @@ static int mtd_add_partition_attrs(struc
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return ret;
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}
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-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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+
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+static int
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+__mtd_add_partition(struct mtd_info *master, const char *name,
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+ long long offset, long long length, bool dup_check)
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{
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struct mtd_partition part;
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struct mtd_part *new;
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@@ -612,6 +617,7 @@ int mtd_add_partition(struct mtd_info *m
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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(master, new);
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mtd_add_partition_attrs(new);
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@@ -619,6 +625,12 @@ int mtd_add_partition(struct mtd_info *m
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}
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EXPORT_SYMBOL_GPL(mtd_add_partition);
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+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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+{
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+ return __mtd_add_partition(master, name, offset, length, true);
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+}
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+
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int mtd_del_partition(struct mtd_info *master, int partno)
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{
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struct mtd_part *slave, *next;
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@@ -644,6 +656,35 @@ int mtd_del_partition(struct mtd_info *m
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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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+ config_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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@@ -673,6 +714,7 @@ int add_mtd_partitions(struct mtd_info *
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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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cur_offset = slave->offset + slave->mtd.size;
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--- a/include/linux/mtd/partitions.h
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+++ b/include/linux/mtd/partitions.h
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@@ -84,5 +84,7 @@ int mtd_add_partition(struct mtd_info *m
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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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