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kernel: backport mtd patch adding of_platform_populate() calls 

This is required for non-parser drivers handling MTD devices.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 41e1e838fb)
This commit is contained in:
Rafał Miłecki 2022-07-08 07:58:20 +02:00
parent bcaabe6d05
commit afc1839181
7 changed files with 88 additions and 15 deletions
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72
target/linux/generic/backport-5.4/412-v5.19-mtd-call-of_platform_populate-for-MTD-partitions.patch Normal file
View File

@ -0,0 +1,72 @@
From bcdf0315a61a29eb753a607d3a85a4032de72d94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Tue, 10 May 2022 15:12:59 +0200
Subject: [PATCH] mtd: call of_platform_populate() for MTD partitions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Until this change MTD subsystem supported handling partitions only with
MTD partitions parsers. That's a specific / limited API designed around
partitions.
Some MTD partitions may however require different handling. They may
contain specific data that needs to be parsed and somehow extracted. For
that purpose MTD subsystem should allow binding of standard platform
drivers.
An example can be U-Boot (sub)partition with environment variables.
There exist a "u-boot,env" DT binding for MTD (sub)partition that
requires an NVMEM driver.
Ref: 5db1c2dbc04c ("dt-bindings: nvmem: add U-Boot environment variables binding")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220510131259.555-1-zajec5@gmail.com
---
drivers/mtd/mtdpart.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -17,6 +17,7 @@
#include <linux/mtd/partitions.h>
#include <linux/err.h>
#include <linux/of.h>
+#include <linux/of_platform.h>
#include "mtdcore.h"
@@ -893,10 +894,16 @@ static int mtd_part_of_parse(struct mtd_
struct mtd_part_parser *parser;
struct device_node *np;
struct property *prop;
+ struct device *dev;
const char *compat;
const char *fixed = "fixed-partitions";
int ret, err = 0;
+ dev = &master->dev;
+ /* Use parent device (controller) if the top level MTD is not registered */
+ if (!IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) && !mtd_is_partition(master))
+ dev = master->dev.parent;
+
np = mtd_get_of_node(master);
if (mtd_is_partition(master))
of_node_get(np);
@@ -909,6 +916,7 @@ static int mtd_part_of_parse(struct mtd_
continue;
ret = mtd_part_do_parse(parser, master, pparts, NULL);
if (ret > 0) {
+ of_platform_populate(np, NULL, NULL, dev);
of_node_put(np);
return ret;
}
@@ -916,6 +924,7 @@ static int mtd_part_of_parse(struct mtd_
if (ret < 0 && !err)
err = ret;
}
+ of_platform_populate(np, NULL, NULL, dev);
of_node_put(np);
/*

11
target/linux/generic/pending-5.4/400-mtd-add-rootfs-split-support.patch
View File

@ -37,20 +37,21 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
depends on m
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -15,10 +15,12 @@
@@ -15,11 +15,13 @@
#include <linux/kmod.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
+#include <linux/magic.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include "mtdcore.h"
+#include "mtdsplit/mtdsplit.h"
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
@@ -38,6 +40,8 @@ struct mtd_part {
@@ -39,6 +41,8 @@ struct mtd_part {
struct list_head list;
};
@ -59,7 +60,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/*
* Given a pointer to the MTD object in the mtd_part structure, we can retrieve
* the pointer to that structure.
@@ -612,6 +616,7 @@ int mtd_add_partition(struct mtd_info *p
@@ -613,6 +617,7 @@ int mtd_add_partition(struct mtd_info *p
if (ret)
goto err_remove_part;
@ -67,7 +68,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
mtd_add_partition_attrs(new);
return 0;
@@ -698,6 +703,29 @@ int mtd_del_partition(struct mtd_info *m
@@ -699,6 +704,29 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
@ -97,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/*
* This function, given a master MTD object and a partition table, creates
* and registers slave MTD objects which are bound to the master according to
@@ -738,6 +766,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -739,6 +767,7 @@ int add_mtd_partitions(struct mtd_info *
goto err_del_partitions;
}

6
target/linux/generic/pending-5.4/401-mtd-add-support-for-different-partition-parser-types.patch
View File

@ -9,7 +9,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -41,6 +41,10 @@ struct mtd_part {
@@ -42,6 +42,10 @@ struct mtd_part {
};
static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part);
@ -20,7 +20,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
/*
* Given a pointer to the MTD object in the mtd_part structure, we can retrieve
@@ -703,6 +707,36 @@ int mtd_del_partition(struct mtd_info *m
@@ -704,6 +708,36 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
@ -57,7 +57,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
#define SPLIT_FIRMWARE_NAME CONFIG_MTD_SPLIT_FIRMWARE_NAME
#else
@@ -1052,6 +1086,61 @@ void mtd_part_parser_cleanup(struct mtd_
@@ -1061,6 +1095,61 @@ void mtd_part_parser_cleanup(struct mtd_
}
}

4
target/linux/generic/pending-5.4/402-mtd-use-typed-mtd-parsers-for-rootfs-and-firmware-split.patch
View File

@ -10,7 +10,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -745,6 +745,7 @@ run_parsers_by_type(struct mtd_part *sla
@@ -746,6 +746,7 @@ run_parsers_by_type(struct mtd_part *sla
static void split_firmware(struct mtd_info *master, struct mtd_part *part)
{
@ -18,7 +18,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
}
static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
@@ -754,6 +755,12 @@ static void mtd_partition_split(struct m
@@ -755,6 +756,12 @@ static void mtd_partition_split(struct m
if (rootfs_found)
return;

2
target/linux/generic/pending-5.4/404-mtd-add-more-helper-functions.patch
View File

@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -1165,6 +1165,24 @@ int mtd_is_partition(const struct mtd_in
@@ -1174,6 +1174,24 @@ int mtd_is_partition(const struct mtd_in
}
EXPORT_SYMBOL_GPL(mtd_is_partition);

6
target/linux/generic/pending-5.4/411-mtd-partial_eraseblock_write.patch
View File

@ -10,7 +10,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -22,6 +22,8 @@
@@ -23,6 +23,8 @@
#include "mtdcore.h"
#include "mtdsplit/mtdsplit.h"
@ -19,7 +19,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
static DEFINE_MUTEX(mtd_partitions_mutex);
@@ -206,11 +208,77 @@ static int part_erase(struct mtd_info *m
@@ -207,11 +209,77 @@ static int part_erase(struct mtd_info *m
{
struct mtd_part *part = mtd_to_part(mtd);
int ret;
@ -97,7 +97,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
instr->addr -= part->offset;
return ret;
@@ -525,19 +593,22 @@ static struct mtd_part *allocate_partiti
@@ -526,19 +594,22 @@ static struct mtd_part *allocate_partiti
remainder = do_div(tmp, wr_alignment);
if ((slave->mtd.flags & MTD_WRITEABLE) && remainder) {
/* Doesn't start on a boundary of major erase size */

2
target/linux/generic/pending-5.4/412-mtd-partial_eraseblock_unlock.patch
View File

@ -20,7 +20,7 @@ Signed-off-by: Tim Harvey <tharvey@gateworks.com>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -293,7 +293,16 @@ static int part_lock(struct mtd_info *mt
@@ -294,7 +294,16 @@ static int part_lock(struct mtd_info *mt
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = mtd_to_part(mtd);