kernel: update nvmem subsystem to the latest upstream

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

1 files changed, 67 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/808-v6.2-0006-nvmem-u-boot-env-add-Broadcom-format-support.patch b/target/linux/generic/backport-5.15/808-v6.2-0006-nvmem-u-boot-env-add-Broadcom-format-support.patch
new file mode 100644
index 0000000000..861386ad31
--- /dev/null
+++ b/target/linux/generic/backport-5.15/808-v6.2-0006-nvmem-u-boot-env-add-Broadcom-format-support.patch
@@ -0,0 +1,67 @@
+From ada84d07af6097b2addd18262668ce6cb9e15206 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Fri, 18 Nov 2022 06:39:27 +0000
+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>
+Link: https://lore.kernel.org/r/20221118063932.6418-9-srinivas.kandagatla@linaro.org
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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, },
+ 	{},
+ };
+