kernel: backport 5.13 mtd partitioning changes

1. Use upstream accepted NVMEM patches
2. Minor fix for BCM4908 partitioning
3. Support for Linksys firmware partitions on Northstar

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

6 files changed, 475 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/405-v5.13-mtd-parsers-ofpart-make-symbol-bcm4908_partitions_qu.patch b/target/linux/generic/backport-5.4/405-v5.13-mtd-parsers-ofpart-make-symbol-bcm4908_partitions_qu.patch
new file mode 100644
index 0000000000..f1b778a6e1
--- /dev/null
+++ b/target/linux/generic/backport-5.4/405-v5.13-mtd-parsers-ofpart-make-symbol-bcm4908_partitions_qu.patch
@@ -0,0 +1,34 @@
+From b87b6d2d6f540e29c3f98e1572d64e560d73d6c1 Mon Sep 17 00:00:00 2001
+From: Wei Yongjun <weiyongjun1@huawei.com>
+Date: Thu, 4 Mar 2021 06:46:00 +0000
+Subject: [PATCH] mtd: parsers: ofpart: make symbol 'bcm4908_partitions_quirks'
+ static
+
+The sparse tool complains as follows:
+
+drivers/mtd/parsers/ofpart_core.c:25:32: warning:
+ symbol 'bcm4908_partitions_quirks' was not declared. Should it be static?
+
+This symbol is not used outside of ofpart_core.c, so this
+commit marks it static.
+
+Fixes: 457da931b608 ("mtd: parsers: ofpart: support BCM4908 fixed partitions")
+Reported-by: Hulk Robot <hulkci@huawei.com>
+Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210304064600.3279138-1-weiyongjun1@huawei.com
+---
+ drivers/mtd/parsers/ofpart_core.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/mtd/parsers/ofpart_core.c
++++ b/drivers/mtd/parsers/ofpart_core.c
+@@ -22,7 +22,7 @@ struct fixed_partitions_quirks {
+ 	int (*post_parse)(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts);
+ };
+ 
+-struct fixed_partitions_quirks bcm4908_partitions_quirks = {
++static struct fixed_partitions_quirks bcm4908_partitions_quirks = {
+ 	.post_parse = bcm4908_partitions_post_parse,
+ };
+ 
diff --git a/target/linux/generic/backport-5.4/406-v5.13-0001-mtd-core-add-nvmem-cells-compatible-to-parse-mtd-as-.patch b/target/linux/generic/backport-5.4/406-v5.13-0001-mtd-core-add-nvmem-cells-compatible-to-parse-mtd-as-.patch
new file mode 100644
index 0000000000..ecea743d87
--- /dev/null
+++ b/target/linux/generic/backport-5.4/406-v5.13-0001-mtd-core-add-nvmem-cells-compatible-to-parse-mtd-as-.patch
@@ -0,0 +1,40 @@
+From 658c4448bbbf02a143abf1b89d09a3337ebd3ba6 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Fri, 12 Mar 2021 07:28:19 +0100
+Subject: [PATCH] mtd: core: add nvmem-cells compatible to parse mtd as nvmem
+ cells
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Partitions that contains the nvmem-cells compatible will register
+their direct subonodes as nvmem cells and the node will be treated as a
+nvmem provider.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+Tested-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210312062830.20548-1-ansuelsmth@gmail.com
+---
+ drivers/mtd/mtdcore.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/mtd/mtdcore.c
++++ b/drivers/mtd/mtdcore.c
+@@ -559,6 +559,7 @@ static int mtd_nvmem_reg_read(void *priv
+ 
+ static int mtd_nvmem_add(struct mtd_info *mtd)
+ {
++	struct device_node *node = mtd_get_of_node(mtd);
+ 	struct nvmem_config config = {};
+ 
+ 	config.id = -1;
+@@ -571,7 +572,7 @@ static int mtd_nvmem_add(struct mtd_info
+ 	config.stride = 1;
+ 	config.read_only = true;
+ 	config.root_only = true;
+-	config.no_of_node = true;
++	config.no_of_node = !of_device_is_compatible(node, "nvmem-cells");
+ 	config.priv = mtd;
+ 
+ 	mtd->nvmem = nvmem_register(&config);
diff --git a/target/linux/generic/backport-5.4/406-v5.13-0002-dt-bindings-nvmem-drop-nodename-restriction.patch b/target/linux/generic/backport-5.4/406-v5.13-0002-dt-bindings-nvmem-drop-nodename-restriction.patch
new file mode 100644
index 0000000000..c0515bd571
--- /dev/null
+++ b/target/linux/generic/backport-5.4/406-v5.13-0002-dt-bindings-nvmem-drop-nodename-restriction.patch
@@ -0,0 +1,28 @@
+From 52981a0fa9f7d68641e0e6bb584054c6d9eb2056 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Fri, 12 Mar 2021 07:28:20 +0100
+Subject: [PATCH] dt-bindings: nvmem: drop $nodename restriction
+
+Drop $nodename restriction as now mtd partition can also be used as
+nvmem provider.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210312062830.20548-2-ansuelsmth@gmail.com
+---
+ Documentation/devicetree/bindings/nvmem/nvmem.yaml | 3 ---
+ 1 file changed, 3 deletions(-)
+
+--- a/Documentation/devicetree/bindings/nvmem/nvmem.yaml
++++ b/Documentation/devicetree/bindings/nvmem/nvmem.yaml
+@@ -20,9 +20,6 @@ description: |
+   storage device.
+ 
+ properties:
+-  $nodename:
+-    pattern: "^(eeprom|efuse|nvram)(@.*|-[0-9a-f])*$"
+-
+   "#address-cells":
+     const: 1
+ 
diff --git a/target/linux/generic/backport-5.4/406-v5.13-0003-dt-bindings-mtd-Document-use-of-nvmem-cells-compatib.patch b/target/linux/generic/backport-5.4/406-v5.13-0003-dt-bindings-mtd-Document-use-of-nvmem-cells-compatib.patch
new file mode 100644
index 0000000000..552919f587
--- /dev/null
+++ b/target/linux/generic/backport-5.4/406-v5.13-0003-dt-bindings-mtd-Document-use-of-nvmem-cells-compatib.patch
@@ -0,0 +1,119 @@
+From ac42c46f983e4a9003a7bb91ad44a23ab7b8f534 Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Fri, 12 Mar 2021 07:28:21 +0100
+Subject: [PATCH] dt-bindings: mtd: Document use of nvmem-cells compatible
+
+Document nvmem-cells compatible used to treat mtd partitions as a
+nvmem provider.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210312062830.20548-3-ansuelsmth@gmail.com
+---
+ .../bindings/mtd/partitions/nvmem-cells.yaml  | 99 +++++++++++++++++++
+ 1 file changed, 99 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/mtd/partitions/nvmem-cells.yaml
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mtd/partitions/nvmem-cells.yaml
+@@ -0,0 +1,99 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/mtd/partitions/nvmem-cells.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: Nvmem cells
++
++description: |
++  Any partition containing the compatible "nvmem-cells" will register as a
++  nvmem provider.
++  Each direct subnodes represents a nvmem cell following the nvmem binding.
++  Nvmem binding to declare nvmem-cells can be found in:
++  Documentation/devicetree/bindings/nvmem/nvmem.yaml
++
++maintainers:
++  - Ansuel Smith <ansuelsmth@gmail.com>
++
++allOf:
++  - $ref: /schemas/nvmem/nvmem.yaml#
++
++properties:
++  compatible:
++    const: nvmem-cells
++
++required:
++  - compatible
++
++additionalProperties: true
++
++examples:
++  - |
++    partitions {
++      compatible = "fixed-partitions";
++      #address-cells = <1>;
++      #size-cells = <1>;
++
++      /* ... */
++
++      };
++      art: art@1200000 {
++        compatible = "nvmem-cells";
++        reg = <0x1200000 0x0140000>;
++        label = "art";
++        read-only;
++        #address-cells = <1>;
++        #size-cells = <1>;
++
++        macaddr_gmac1: macaddr_gmac1@0 {
++          reg = <0x0 0x6>;
++        };
++
++        macaddr_gmac2: macaddr_gmac2@6 {
++          reg = <0x6 0x6>;
++        };
++
++        pre_cal_24g: pre_cal_24g@1000 {
++          reg = <0x1000 0x2f20>;
++        };
++
++        pre_cal_5g: pre_cal_5g@5000{
++          reg = <0x5000 0x2f20>;
++        };
++      };
++  - |
++    partitions {
++        compatible = "fixed-partitions";
++        #address-cells = <1>;
++        #size-cells = <1>;
++
++        partition@0 {
++            label = "bootloader";
++            reg = <0x000000 0x100000>;
++            read-only;
++        };
++
++        firmware@100000 {
++            compatible = "brcm,trx";
++            label = "firmware";
++            reg = <0x100000 0xe00000>;
++        };
++
++        calibration@f00000 {
++            compatible = "nvmem-cells";
++            label = "calibration";
++            reg = <0xf00000 0x100000>;
++            ranges = <0 0xf00000 0x100000>;
++            #address-cells = <1>;
++            #size-cells = <1>;
++
++            wifi0@0 {
++                reg = <0x000000 0x080000>;
++            };
++
++            wifi1@80000 {
++                reg = <0x080000 0x080000>;
++            };
++        };
++    };
diff --git a/target/linux/generic/backport-5.4/407-v5.13-0001-dt-bindings-mtd-add-binding-for-Linksys-Northstar-pa.patch b/target/linux/generic/backport-5.4/407-v5.13-0001-dt-bindings-mtd-add-binding-for-Linksys-Northstar-pa.patch
new file mode 100644
index 0000000000..35a4afd67b
--- /dev/null
+++ b/target/linux/generic/backport-5.4/407-v5.13-0001-dt-bindings-mtd-add-binding-for-Linksys-Northstar-pa.patch
@@ -0,0 +1,98 @@
+From 2fa7294175c76e1ec568aa75c1891fd908728c8d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Fri, 12 Mar 2021 14:49:18 +0100
+Subject: [PATCH] dt-bindings: mtd: add binding for Linksys Northstar
+ partitions
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Linksys on Broadcom Northstar devices uses fixed flash layout with
+multiple firmware partitions.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210312134919.7767-1-zajec5@gmail.com
+---
+ .../mtd/partitions/linksys,ns-partitions.yaml | 74 +++++++++++++++++++
+ 1 file changed, 74 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/mtd/partitions/linksys,ns-partitions.yaml
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/mtd/partitions/linksys,ns-partitions.yaml
+@@ -0,0 +1,74 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/mtd/partitions/linksys,ns-partitions.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: Linksys Northstar partitioning
++
++description: |
++  Linksys devices based on Broadcom Northstar architecture often use two
++  firmware partitions. One is used for regular booting, the other is treated as
++  fallback.
++
++  This binding allows defining all fixed partitions and marking those containing
++  firmware. System can use that information e.g. for booting or flashing
++  purposes.
++
++maintainers:
++  - Rafał Miłecki <rafal@milecki.pl>
++
++properties:
++  compatible:
++    const: linksys,ns-partitions
++
++  "#address-cells":
++    enum: [ 1, 2 ]
++
++  "#size-cells":
++    enum: [ 1, 2 ]
++
++patternProperties:
++  "^partition@[0-9a-f]+$":
++    $ref: "partition.yaml#"
++    properties:
++      compatible:
++        items:
++          - const: linksys,ns-firmware
++          - const: brcm,trx
++    unevaluatedProperties: false
++
++required:
++  - "#address-cells"
++  - "#size-cells"
++
++additionalProperties: false
++
++examples:
++  - |
++    partitions {
++        compatible = "linksys,ns-partitions";
++        #address-cells = <1>;
++        #size-cells = <1>;
++
++        partition@0 {
++            label = "boot";
++            reg = <0x0 0x100000>;
++            read-only;
++        };
++
++        partition@100000 {
++            label = "nvram";
++            reg = <0x100000 0x100000>;
++        };
++
++        partition@200000 {
++            compatible = "linksys,ns-firmware", "brcm,trx";
++            reg = <0x200000 0xf00000>;
++        };
++
++        partition@1100000 {
++            compatible = "linksys,ns-firmware", "brcm,trx";
++            reg = <0x1100000 0xf00000>;
++        };
++    };
diff --git a/target/linux/generic/backport-5.4/407-v5.13-0002-mtd-parsers-ofpart-support-Linksys-Northstar-partiti.patch b/target/linux/generic/backport-5.4/407-v5.13-0002-mtd-parsers-ofpart-support-Linksys-Northstar-partiti.patch
new file mode 100644
index 0000000000..75eb9391ae
--- /dev/null
+++ b/target/linux/generic/backport-5.4/407-v5.13-0002-mtd-parsers-ofpart-support-Linksys-Northstar-partiti.patch
@@ -0,0 +1,156 @@
+From 7134a2d026d942210b4d26d6059c9d979ca7866e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Fri, 12 Mar 2021 14:49:19 +0100
+Subject: [PATCH] mtd: parsers: ofpart: support Linksys Northstar partitions
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This allows extending ofpart parser with support for Linksys Northstar
+devices. That support uses recently added quirks mechanism.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210312134919.7767-2-zajec5@gmail.com
+---
+ drivers/mtd/parsers/Kconfig             | 10 +++++
+ drivers/mtd/parsers/Makefile            |  1 +
+ drivers/mtd/parsers/ofpart_core.c       |  6 +++
+ drivers/mtd/parsers/ofpart_linksys_ns.c | 50 +++++++++++++++++++++++++
+ drivers/mtd/parsers/ofpart_linksys_ns.h | 18 +++++++++
+ 5 files changed, 85 insertions(+)
+ create mode 100644 drivers/mtd/parsers/ofpart_linksys_ns.c
+ create mode 100644 drivers/mtd/parsers/ofpart_linksys_ns.h
+
+--- a/drivers/mtd/parsers/Kconfig
++++ b/drivers/mtd/parsers/Kconfig
+@@ -76,6 +76,16 @@ config MTD_OF_PARTS_BCM4908
+ 	  that can have multiple "firmware" partitions. It takes care of
+ 	  finding currently used one and backup ones.
+ 
++config MTD_OF_PARTS_LINKSYS_NS
++	bool "Linksys Northstar partitioning support"
++	depends on MTD_OF_PARTS && (ARCH_BCM_5301X || ARCH_BCM4908 || COMPILE_TEST)
++	default ARCH_BCM_5301X
++	help
++	  This provides partitions parser for Linksys devices based on Broadcom
++	  Northstar architecture. Linksys commonly uses fixed flash layout with
++	  two "firmware" partitions. Currently used firmware has to be detected
++	  using CFE environment variable.
++
+ config MTD_PARSER_IMAGETAG
+ 	tristate "Parser for BCM963XX Image Tag format partitions"
+ 	depends on BCM63XX || BMIPS_GENERIC || COMPILE_TEST
+--- a/drivers/mtd/parsers/Makefile
++++ b/drivers/mtd/parsers/Makefile
+@@ -6,6 +6,7 @@ obj-$(CONFIG_MTD_CMDLINE_PARTS)		+= cmdl
+ obj-$(CONFIG_MTD_OF_PARTS)		+= ofpart.o
+ ofpart-y				+= ofpart_core.o
+ ofpart-$(CONFIG_MTD_OF_PARTS_BCM4908)	+= ofpart_bcm4908.o
++ofpart-$(CONFIG_MTD_OF_PARTS_LINKSYS_NS)+= ofpart_linksys_ns.o
+ obj-$(CONFIG_MTD_PARSER_IMAGETAG)	+= parser_imagetag.o
+ obj-$(CONFIG_MTD_AFS_PARTS)		+= afs.o
+ obj-$(CONFIG_MTD_PARSER_TRX)		+= parser_trx.o
+--- a/drivers/mtd/parsers/ofpart_core.c
++++ b/drivers/mtd/parsers/ofpart_core.c
+@@ -17,6 +17,7 @@
+ #include <linux/mtd/partitions.h>
+ 
+ #include "ofpart_bcm4908.h"
++#include "ofpart_linksys_ns.h"
+ 
+ struct fixed_partitions_quirks {
+ 	int (*post_parse)(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts);
+@@ -26,6 +27,10 @@ static struct fixed_partitions_quirks bc
+ 	.post_parse = bcm4908_partitions_post_parse,
+ };
+ 
++static struct fixed_partitions_quirks linksys_ns_partitions_quirks = {
++	.post_parse = linksys_ns_partitions_post_parse,
++};
++
+ static const struct of_device_id parse_ofpart_match_table[];
+ 
+ static bool node_has_compatible(struct device_node *pp)
+@@ -164,6 +169,7 @@ static const struct of_device_id parse_o
+ 	{ .compatible = "fixed-partitions" },
+ 	/* Customized */
+ 	{ .compatible = "brcm,bcm4908-partitions", .data = &bcm4908_partitions_quirks, },
++	{ .compatible = "linksys,ns-partitions", .data = &linksys_ns_partitions_quirks, },
+ 	{},
+ };
+ MODULE_DEVICE_TABLE(of, parse_ofpart_match_table);
+--- /dev/null
++++ b/drivers/mtd/parsers/ofpart_linksys_ns.c
+@@ -0,0 +1,50 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl>
++ */
++
++#include <linux/bcm47xx_nvram.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/partitions.h>
++
++#include "ofpart_linksys_ns.h"
++
++#define NVRAM_BOOT_PART		"bootpartition"
++
++static int ofpart_linksys_ns_bootpartition(void)
++{
++	char buf[4];
++	int bootpartition;
++
++	/* Check CFE environment variable */
++	if (bcm47xx_nvram_getenv(NVRAM_BOOT_PART, buf, sizeof(buf)) > 0) {
++		if (!kstrtoint(buf, 0, &bootpartition))
++			return bootpartition;
++		pr_warn("Failed to parse %s value \"%s\"\n", NVRAM_BOOT_PART,
++			buf);
++	} else {
++		pr_warn("Failed to get NVRAM \"%s\"\n", NVRAM_BOOT_PART);
++	}
++
++	return 0;
++}
++
++int linksys_ns_partitions_post_parse(struct mtd_info *mtd,
++				     struct mtd_partition *parts,
++				     int nr_parts)
++{
++	int bootpartition = ofpart_linksys_ns_bootpartition();
++	int trx_idx = 0;
++	int i;
++
++	for (i = 0; i < nr_parts; i++) {
++		if (of_device_is_compatible(parts[i].of_node, "linksys,ns-firmware")) {
++			if (trx_idx++ == bootpartition)
++				parts[i].name = "firmware";
++			else
++				parts[i].name = "backup";
++		}
++	}
++
++	return 0;
++}
+--- /dev/null
++++ b/drivers/mtd/parsers/ofpart_linksys_ns.h
+@@ -0,0 +1,18 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++#ifndef __OFPART_LINKSYS_NS_H
++#define __OFPART_LINKSYS_NS_H
++
++#ifdef CONFIG_MTD_OF_PARTS_LINKSYS_NS
++int linksys_ns_partitions_post_parse(struct mtd_info *mtd,
++				     struct mtd_partition *parts,
++				     int nr_parts);
++#else
++static inline int linksys_ns_partitions_post_parse(struct mtd_info *mtd,
++						   struct mtd_partition *parts,
++						   int nr_parts)
++{
++	return -EOPNOTSUPP;
++}
++#endif
++
++#endif