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kernel: backport mtd patch adding of_platform_populate() calls

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

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 41e1e838fbbb0308ad7353a3714e04b8c4585e7e)
This commit is contained in:
Rafał Miłecki 2022-07-08 07:58:20 +02:00
parent 510f0628c7
commit 8835da4d90
3 changed files with 81 additions and 8 deletions
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72
target/linux/generic/backport-5.10/412-v5.19-mtd-call-of_platform_populate-for-MTD-partitions.patch Normal file
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@ -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"
@@ -578,10 +579,16 @@ 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);
@@ -594,6 +601,7 @@ 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;
}
@@ -601,6 +609,7 @@ 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-5.10/400-mtd-mtdsplit-support.patch
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@ -28,20 +28,21 @@
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"
/*
* MTD methods which simply translate the effective address and pass through
@@ -236,6 +238,146 @@ static int mtd_add_partition_attrs(struc
@@ -237,6 +239,146 @@ static int mtd_add_partition_attrs(struc
return ret;
}
@ -188,7 +189,7 @@
int mtd_add_partition(struct mtd_info *parent, const char *name,
long long offset, long long length)
{
@@ -274,6 +416,7 @@ int mtd_add_partition(struct mtd_info *p
@@ -275,6 +417,7 @@ int mtd_add_partition(struct mtd_info *p
if (ret)
goto err_remove_part;
@ -196,7 +197,7 @@
mtd_add_partition_attrs(child);
return 0;
@@ -422,6 +565,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -423,6 +566,7 @@ int add_mtd_partitions(struct mtd_info *
goto err_del_partitions;
}
@ -204,7 +205,7 @@
mtd_add_partition_attrs(child);
/* Look for subpartitions */
@@ -438,31 +582,6 @@ err_del_partitions:
@@ -439,31 +583,6 @@ err_del_partitions:
return ret;
}

6
target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch
View File

@ -106,7 +106,7 @@ Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
&dev_attr_oobsize.attr,
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -40,6 +40,7 @@ static struct mtd_info *allocate_partiti
@@ -41,6 +41,7 @@ static struct mtd_info *allocate_partiti
struct mtd_info *master = mtd_get_master(parent);
int wr_alignment = (parent->flags & MTD_NO_ERASE) ?
master->writesize : master->erasesize;
@ -114,7 +114,7 @@ Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
u64 parent_size = mtd_is_partition(parent) ?
parent->part.size : parent->size;
struct mtd_info *child;
@@ -164,6 +165,7 @@ static struct mtd_info *allocate_partiti
@@ -165,6 +166,7 @@ static struct mtd_info *allocate_partiti
} else {
/* Single erase size */
child->erasesize = master->erasesize;
@ -122,7 +122,7 @@ Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
}
/*
@@ -171,26 +173,39 @@ static struct mtd_info *allocate_partiti
@@ -172,26 +174,39 @@ static struct mtd_info *allocate_partiti
* exposes several regions with different erasesize. Adjust
* wr_alignment accordingly.
*/