kernel: backport NVMEM patches queued for the v6.4

They add NVMEM layouts support. It allows handling NVMEM content
independently of NVMEM device access.

Skip U-Boot env data patch for now as it break our downstream MAC hacks.

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

1 files changed, 76 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/811-v6.4-0009-nvmem-core-provide-own-priv-pointer-in-post-process-.patch b/target/linux/generic/backport-5.15/811-v6.4-0009-nvmem-core-provide-own-priv-pointer-in-post-process-.patch
new file mode 100644
index 0000000000..46b30a2ed9
--- /dev/null
+++ b/target/linux/generic/backport-5.15/811-v6.4-0009-nvmem-core-provide-own-priv-pointer-in-post-process-.patch
@@ -0,0 +1,76 @@
+From 8a134fd9f9323f4c39ec27055b3d3723cfb5c1e9 Mon Sep 17 00:00:00 2001
+From: Michael Walle <michael@walle.cc>
+Date: Tue, 4 Apr 2023 18:21:28 +0100
+Subject: [PATCH] nvmem: core: provide own priv pointer in post process
+ callback
+
+It doesn't make any more sense to have a opaque pointer set up by the
+nvmem device. Usually, the layout isn't associated with a particular
+nvmem device. Instead, let the caller who set the post process callback
+provide the priv pointer.
+
+Signed-off-by: Michael Walle <michael@walle.cc>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+Link: https://lore.kernel.org/r/20230404172148.82422-21-srinivas.kandagatla@linaro.org
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/nvmem/core.c           | 4 +++-
+ include/linux/nvmem-provider.h | 5 ++++-
+ 2 files changed, 7 insertions(+), 2 deletions(-)
+
+--- a/drivers/nvmem/core.c
++++ b/drivers/nvmem/core.c
+@@ -54,6 +54,7 @@ struct nvmem_cell_entry {
+ 	int			bit_offset;
+ 	int			nbits;
+ 	nvmem_cell_post_process_t read_post_process;
++	void			*priv;
+ 	struct device_node	*np;
+ 	struct nvmem_device	*nvmem;
+ 	struct list_head	node;
+@@ -471,6 +472,7 @@ static int nvmem_cell_info_to_nvmem_cell
+ 	cell->bytes = info->bytes;
+ 	cell->name = info->name;
+ 	cell->read_post_process = info->read_post_process;
++	cell->priv = info->priv;
+ 
+ 	cell->bit_offset = info->bit_offset;
+ 	cell->nbits = info->nbits;
+@@ -1568,7 +1570,7 @@ static int __nvmem_cell_read(struct nvme
+ 		nvmem_shift_read_buffer_in_place(cell, buf);
+ 
+ 	if (cell->read_post_process) {
+-		rc = cell->read_post_process(nvmem->priv, id, index,
++		rc = cell->read_post_process(cell->priv, id, index,
+ 					     cell->offset, buf, cell->bytes);
+ 		if (rc)
+ 			return rc;
+--- a/include/linux/nvmem-provider.h
++++ b/include/linux/nvmem-provider.h
+@@ -20,7 +20,8 @@ typedef int (*nvmem_reg_write_t)(void *p
+ 				 void *val, size_t bytes);
+ /* used for vendor specific post processing of cell data */
+ typedef int (*nvmem_cell_post_process_t)(void *priv, const char *id, int index,
+-					 unsigned int offset, void *buf, size_t bytes);
++					 unsigned int offset, void *buf,
++					 size_t bytes);
+ 
+ enum nvmem_type {
+ 	NVMEM_TYPE_UNKNOWN = 0,
+@@ -56,6 +57,7 @@ struct nvmem_keepout {
+  * @np:		Optional device_node pointer.
+  * @read_post_process:	Callback for optional post processing of cell data
+  *			on reads.
++ * @priv:	Opaque data passed to the read_post_process hook.
+  */
+ struct nvmem_cell_info {
+ 	const char		*name;
+@@ -65,6 +67,7 @@ struct nvmem_cell_info {
+ 	unsigned int		nbits;
+ 	struct device_node	*np;
+ 	nvmem_cell_post_process_t read_post_process;
++	void			*priv;
+ };
+ 
+ /**