kernel: update U-Boot NVMEM driver

1. Fix casting
2. Support DT-defined variables

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 5652f378c6c607f99a15e6472cdca46c9c4b6162)

3 files changed, 59 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/801-v6.1-nvmem-add-driver-handling-U-Boot-environment-variabl.patch b/target/linux/generic/backport-5.10/801-v6.1-0001-nvmem-add-driver-handling-U-Boot-environment-variabl.patch
index 1459d1184e..1459d1184e 100644
--- a/target/linux/generic/backport-5.10/801-v6.1-nvmem-add-driver-handling-U-Boot-environment-variabl.patch
+++ b/target/linux/generic/backport-5.10/801-v6.1-0001-nvmem-add-driver-handling-U-Boot-environment-variabl.patch
diff --git a/target/linux/generic/backport-5.10/801-v6.1-0002-nvmem-u-boot-env-find-Device-Tree-nodes-for-NVMEM-ce.patch b/target/linux/generic/backport-5.10/801-v6.1-0002-nvmem-u-boot-env-find-Device-Tree-nodes-for-NVMEM-ce.patch
new file mode 100644
index 0000000000..3a6b76a221
--- /dev/null
+++ b/target/linux/generic/backport-5.10/801-v6.1-0002-nvmem-u-boot-env-find-Device-Tree-nodes-for-NVMEM-ce.patch
@@ -0,0 +1,29 @@
+From d69efcf951df4dcc74a0e1554969c533aec8aa9b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 15 Sep 2022 22:06:29 +0200
+Subject: [PATCH] nvmem: u-boot-env: find Device Tree nodes for NVMEM cells
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+DT binding allows specifying NVMEM cells as NVMEM device (provider)
+subnodes. Looks for such subnodes when building NVMEM cells.
+
+This allows NVMEM consumers to use U-Boot environment variables.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+---
+ drivers/nvmem/u-boot-env.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/nvmem/u-boot-env.c
++++ b/drivers/nvmem/u-boot-env.c
+@@ -92,6 +92,7 @@ static int u_boot_env_add_cells(struct u
+ 			return -ENOMEM;
+ 		priv->cells[idx].offset = data_offset + value - data;
+ 		priv->cells[idx].bytes = strlen(value);
++		priv->cells[idx].np = of_get_child_by_name(dev->of_node, priv->cells[idx].name);
+ 	}
+ 
+ 	if (WARN_ON(idx != priv->ncells))
diff --git a/target/linux/generic/backport-5.10/801-v6.1-0003-nvmem-u-boot-env-fix-crc32-casting-type.patch b/target/linux/generic/backport-5.10/801-v6.1-0003-nvmem-u-boot-env-fix-crc32-casting-type.patch
new file mode 100644
index 0000000000..6b40557116
--- /dev/null
+++ b/target/linux/generic/backport-5.10/801-v6.1-0003-nvmem-u-boot-env-fix-crc32-casting-type.patch
@@ -0,0 +1,30 @@
+From 60bbaad38109684b156e21112322e0a922f92cde Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 18 Aug 2022 06:38:37 +0200
+Subject: [PATCH] nvmem: u-boot-env: fix crc32 casting type
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This fixes:
+drivers/nvmem/u-boot-env.c:141:17: sparse: sparse: cast to restricted __le32
+
+Reported-by: kernel test robot <lkp@intel.com>
+Fixes: f955dc1445069 ("nvmem: add driver handling U-Boot environment variables")
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+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
+@@ -139,7 +139,7 @@ static int u_boot_env_parse(struct u_boo
+ 		data_offset = offsetof(struct u_boot_env_image_redundant, data);
+ 		break;
+ 	}
+-	crc32 = le32_to_cpu(*(uint32_t *)(buf + crc32_offset));
++	crc32 = le32_to_cpu(*(__le32 *)(buf + crc32_offset));
+ 	crc32_data_len = priv->mtd->size - crc32_data_offset;
+ 	data_len = priv->mtd->size - data_offset;
+