kernel: update U-Boot nvmem driver to v6.2 release version

Backport queued patches that
1. Fix CRC32 calculation for redundant images
2. Fix CRC32 on big-endian
3. Fix parting images with Broadcom header

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 797177ad85cbf92b5c1e270751eaca9eb4f34f30)

3 files changed, 168 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.4/822-v6.2-0001-nvmem-u-boot-env-fix-crc32_data_offset-on-redundant-.patch b/target/linux/generic/backport-5.4/822-v6.2-0001-nvmem-u-boot-env-fix-crc32_data_offset-on-redundant-.patch
new file mode 100644
index 0000000000..69d5a1b845
--- /dev/null
+++ b/target/linux/generic/backport-5.4/822-v6.2-0001-nvmem-u-boot-env-fix-crc32_data_offset-on-redundant-.patch
@@ -0,0 +1,56 @@
+From 7a69ff9c9bde03a690ea783970f664782fc303d8 Mon Sep 17 00:00:00 2001
+From: Christian Lamparter <chunkeey@gmail.com>
+Date: Fri, 4 Nov 2022 17:52:03 +0100
+Subject: [PATCH] nvmem: u-boot-env: fix crc32_data_offset on redundant
+ u-boot-env
+
+The Western Digital MyBook Live (PowerPC 464/APM82181)
+has a set of redundant u-boot-env. Loading up the driver
+the following error:
+
+| u_boot_env: Invalid calculated CRC32: 0x4f8f2c86 (expected: 0x98b14514)
+| u_boot_env: probe of partition@1e000 failed with error -22
+
+Looking up the userspace libubootenv utilities source [0],
+it looks like the "mark" or "flag" is not part of the
+crc32 sum... which is unfortunate :(
+
+|static int libuboot_load(struct uboot_ctx *ctx)
+|{
+|[...]
+|       if (ctx->redundant) {
+|		[...]
+|               offsetdata = offsetof(struct uboot_env_redund, data);
+|		[...]					//-----^^
+|       }
+|       usable_envsize = ctx->size - offsetdata;
+|       buf[0] = malloc(bufsize);
+|[...]
+|	for (i = 0; i < copies; i++) {
+|		data = (uint8_t *)(buf[i] + offsetdata);
+|               uint32_t crc;
+|
+|		ret = devread(ctx, i, buf[i]);
+|		[...]
+|		crc = *(uint32_t *)(buf[i] + offsetcrc);
+|               dev->crc = crc32(0, (uint8_t *)data, usable_envsize);
+|
+
+[0] https://github.com/sbabic/libubootenv/blob/master/src/uboot_env.c#L951
+Fixes: d5542923f200 ("nvmem: add driver handling U-Boot environment variables")
+Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
+---
+ drivers/nvmem/u-boot-env.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/nvmem/u-boot-env.c
++++ b/drivers/nvmem/u-boot-env.c
+@@ -135,7 +135,7 @@ static int u_boot_env_parse(struct u_boo
+ 		break;
+ 	case U_BOOT_FORMAT_REDUNDANT:
+ 		crc32_offset = offsetof(struct u_boot_env_image_redundant, crc32);
+-		crc32_data_offset = offsetof(struct u_boot_env_image_redundant, mark);
++		crc32_data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		break;
+ 	}
diff --git a/target/linux/generic/backport-5.4/822-v6.2-0002-nvmem-u-boot-env-align-endianness-of-crc32-values.patch b/target/linux/generic/backport-5.4/822-v6.2-0002-nvmem-u-boot-env-align-endianness-of-crc32-values.patch
new file mode 100644
index 0000000000..7d6723bb8e
--- /dev/null
+++ b/target/linux/generic/backport-5.4/822-v6.2-0002-nvmem-u-boot-env-align-endianness-of-crc32-values.patch
@@ -0,0 +1,47 @@
+From 0e71cac033bb7689c4dfa2e6814191337ef770f5 Mon Sep 17 00:00:00 2001
+From: INAGAKI Hiroshi <musashino.open@gmail.com>
+Date: Thu, 13 Oct 2022 00:51:33 +0900
+Subject: [PATCH] nvmem: u-boot-env: align endianness of crc32 values
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This patch fixes crc32 error on Big-Endianness system by conversion of
+calculated crc32 value.
+
+Little-Endianness system:
+
+  obtained crc32: Little
+calculated crc32: Little
+
+Big-Endianness system:
+
+  obtained crc32: Little
+calculated crc32: Big
+
+log (APRESIA ApresiaLightGS120GT-SS, RTL8382M, Big-Endianness):
+
+[    8.570000] u_boot_env 18001200.spi:flash@0:partitions:partition@c0000: Invalid calculated CRC32: 0x88cd6f09 (expected: 0x096fcd88)
+[    8.580000] u_boot_env: probe of 18001200.spi:flash@0:partitions:partition@c0000 failed with error -22
+
+Fixes: f955dc1445069 ("nvmem: add driver handling U-Boot environment variables")
+
+Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
+Acked-by: Rafał Miłecki <rafal@milecki.pl>
+Tested-by: Christian Lamparter <chunkeey@gmail.com>
+Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+---
+ drivers/nvmem/u-boot-env.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/nvmem/u-boot-env.c
++++ b/drivers/nvmem/u-boot-env.c
+@@ -143,7 +143,7 @@ static int u_boot_env_parse(struct u_boo
+ 	crc32_data_len = priv->mtd->size - crc32_data_offset;
+ 	data_len = priv->mtd->size - data_offset;
+ 
+-	calc = crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L;
++	calc = le32_to_cpu((__le32)crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L);
+ 	if (calc != crc32) {
+ 		dev_err(dev, "Invalid calculated CRC32: 0x%08x (expected: 0x%08x)\n", calc, crc32);
+ 		err = -EINVAL;
diff --git a/target/linux/generic/backport-5.4/822-v6.2-0003-nvmem-u-boot-env-add-Broadcom-format-support.patch b/target/linux/generic/backport-5.4/822-v6.2-0003-nvmem-u-boot-env-add-Broadcom-format-support.patch
new file mode 100644
index 0000000000..429b24f0f3
--- /dev/null
+++ b/target/linux/generic/backport-5.4/822-v6.2-0003-nvmem-u-boot-env-add-Broadcom-format-support.patch
@@ -0,0 +1,65 @@
+From 5b4eaafbeac472fc19049152f18e88aecb2b2829 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Mon, 17 Oct 2022 09:17:22 +0200
+Subject: [PATCH] nvmem: u-boot-env: add Broadcom format support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Broadcom uses U-Boot for a lot of their bcmbca familiy chipsets. They
+decided to store U-Boot environment data inside U-Boot partition and to
+use a custom header (with "uEnv" magic and env data length).
+
+Add support for Broadcom's specific binding and their custom format.
+
+Ref: 6b0584c19d87 ("dt-bindings: nvmem: u-boot,env: add Broadcom's variant binding")
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+---
+ drivers/nvmem/u-boot-env.c | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+--- a/drivers/nvmem/u-boot-env.c
++++ b/drivers/nvmem/u-boot-env.c
+@@ -16,6 +16,7 @@
+ enum u_boot_env_format {
+ 	U_BOOT_FORMAT_SINGLE,
+ 	U_BOOT_FORMAT_REDUNDANT,
++	U_BOOT_FORMAT_BROADCOM,
+ };
+ 
+ struct u_boot_env {
+@@ -40,6 +41,13 @@ struct u_boot_env_image_redundant {
+ 	uint8_t data[];
+ } __packed;
+ 
++struct u_boot_env_image_broadcom {
++	__le32 magic;
++	__le32 len;
++	__le32 crc32;
++	uint8_t data[0];
++} __packed;
++
+ static int u_boot_env_read(void *context, unsigned int offset, void *val,
+ 			   size_t bytes)
+ {
+@@ -138,6 +146,11 @@ static int u_boot_env_parse(struct u_boo
+ 		crc32_data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		break;
++	case U_BOOT_FORMAT_BROADCOM:
++		crc32_offset = offsetof(struct u_boot_env_image_broadcom, crc32);
++		crc32_data_offset = offsetof(struct u_boot_env_image_broadcom, data);
++		data_offset = offsetof(struct u_boot_env_image_broadcom, data);
++		break;
+ 	}
+ 	crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset));
+ 	crc32_data_len = priv->mtd->size - crc32_data_offset;
+@@ -202,6 +215,7 @@ static const struct of_device_id u_boot_
+ 	{ .compatible = "u-boot,env", .data = (void *)U_BOOT_FORMAT_SINGLE, },
+ 	{ .compatible = "u-boot,env-redundant-bool", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
+ 	{ .compatible = "u-boot,env-redundant-count", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
++	{ .compatible = "brcm,env", .data = (void *)U_BOOT_FORMAT_BROADCOM, },
+ 	{},
+ };
+