kernel: move parser_trx patches of custom magic to generic

This patch moves the patches of parser_trx in mediatek target to
generic/backport-5.10 to use the changes from ramips target and
backport the additional patch of the parser.

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

3 files changed, 107 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/409-v5.14-0001-dt-bindings-mtd-brcm-trx-Add-brcm-trx-magic.patch b/target/linux/generic/backport-5.10/409-v5.14-0001-dt-bindings-mtd-brcm-trx-Add-brcm-trx-magic.patch
new file mode 100644
index 0000000000..1f34652141
--- /dev/null
+++ b/target/linux/generic/backport-5.10/409-v5.14-0001-dt-bindings-mtd-brcm-trx-Add-brcm-trx-magic.patch
@@ -0,0 +1,32 @@
+From a4d82940ff85a7e307953dfa715f65d5ab487e10 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 18 Apr 2021 23:46:14 +0200
+Subject: dt-bindings: mtd: brcm,trx: Add brcm,trx-magic
+
+This adds the description of an additional property which allows to
+specify a custom partition parser magic to detect a trx partition.
+Buffalo has multiple device which are using the trx format, but with
+different magic values.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+Acked-by: Rob Herring <robh@kernel.org>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210418214616.239574-2-hauke@hauke-m.de
+---
+ .../devicetree/bindings/mtd/partitions/brcm,trx.txt          | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+--- a/Documentation/devicetree/bindings/mtd/partitions/brcm,trx.txt
++++ b/Documentation/devicetree/bindings/mtd/partitions/brcm,trx.txt
+@@ -28,6 +28,11 @@ detected by a software parsing TRX heade
+ Required properties:
+ - compatible : (required) must be "brcm,trx"
+ 
++Optional properties:
++
++- brcm,trx-magic: TRX magic, if it is different from the default magic
++		  0x30524448 as a u32.
++
+ Example:
+ 
+ flash@0 {
diff --git a/target/linux/generic/backport-5.10/409-v5.14-0002-mtd-parsers-trx-Allow-to-specify-brcm-trx-magic-in-D.patch b/target/linux/generic/backport-5.10/409-v5.14-0002-mtd-parsers-trx-Allow-to-specify-brcm-trx-magic-in-D.patch
new file mode 100644
index 0000000000..de2d914852
--- /dev/null
+++ b/target/linux/generic/backport-5.10/409-v5.14-0002-mtd-parsers-trx-Allow-to-specify-brcm-trx-magic-in-D.patch
@@ -0,0 +1,50 @@
+From d7f7e04f8b67571a4bf5a0dcd4f9da4214f5262c Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 18 Apr 2021 23:46:15 +0200
+Subject: mtd: parsers: trx: Allow to specify brcm, trx-magic in DT
+
+Buffalo uses a different TRX magic for every device, to be able to use
+this trx parser, make it possible to specify the TRX magic in device
+tree. If no TRX magic is specified in device tree, the standard value
+will be used. This value should only be specified if a vendor chooses to
+use a non standard TRX magic.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210418214616.239574-3-hauke@hauke-m.de
+---
+ drivers/mtd/parsers/parser_trx.c | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+--- a/drivers/mtd/parsers/parser_trx.c
++++ b/drivers/mtd/parsers/parser_trx.c
+@@ -51,13 +51,20 @@ static int parser_trx_parse(struct mtd_i
+ 			    const struct mtd_partition **pparts,
+ 			    struct mtd_part_parser_data *data)
+ {
++	struct device_node *np = mtd_get_of_node(mtd);
+ 	struct mtd_partition *parts;
+ 	struct mtd_partition *part;
+ 	struct trx_header trx;
+ 	size_t bytes_read;
+ 	uint8_t curr_part = 0, i = 0;
++	uint32_t trx_magic = TRX_MAGIC;
+ 	int err;
+ 
++	/* Get different magic from device tree if specified */
++	err = of_property_read_u32(np, "brcm,trx-magic", &trx_magic);
++	if (err != 0 && err != -EINVAL)
++		pr_err("failed to parse \"brcm,trx-magic\" DT attribute, using default: %d\n", err);
++
+ 	parts = kcalloc(TRX_PARSER_MAX_PARTS, sizeof(struct mtd_partition),
+ 			GFP_KERNEL);
+ 	if (!parts)
+@@ -70,7 +77,7 @@ static int parser_trx_parse(struct mtd_i
+ 		return err;
+ 	}
+ 
+-	if (trx.magic != TRX_MAGIC) {
++	if (trx.magic != trx_magic) {
+ 		kfree(parts);
+ 		return -ENOENT;
+ 	}
diff --git a/target/linux/generic/backport-5.10/409-v5.14-0003-mtd-parsers-trx-Allow-to-use-TRX-parser-on-Mediatek-.patch b/target/linux/generic/backport-5.10/409-v5.14-0003-mtd-parsers-trx-Allow-to-use-TRX-parser-on-Mediatek-.patch
new file mode 100644
index 0000000000..faac535270
--- /dev/null
+++ b/target/linux/generic/backport-5.10/409-v5.14-0003-mtd-parsers-trx-Allow-to-use-TRX-parser-on-Mediatek-.patch
@@ -0,0 +1,25 @@
+From 81bb218c829246962a6327c64eec18ddcc049936 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 18 Apr 2021 23:46:16 +0200
+Subject: mtd: parsers: trx: Allow to use TRX parser on Mediatek SoCs
+
+Buffalo uses the TRX partition format also on Mediatek MT7622 SoCs.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20210418214616.239574-4-hauke@hauke-m.de
+---
+ drivers/mtd/parsers/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/mtd/parsers/Kconfig
++++ b/drivers/mtd/parsers/Kconfig
+@@ -115,7 +115,7 @@ config MTD_AFS_PARTS
+ 
+ config MTD_PARSER_TRX
+ 	tristate "Parser for TRX format partitions"
+-	depends on MTD && (BCM47XX || ARCH_BCM_5301X || COMPILE_TEST)
++	depends on MTD && (BCM47XX || ARCH_BCM_5301X || ARCH_MEDIATEK || COMPILE_TEST)
+ 	help
+ 	  TRX is a firmware format used by Broadcom on their devices. It
+ 	  may contain up to 3/4 partitions (depending on the version).