kernel: backport more NVMEM changes queued for v6.8

[openwrt/openwrt.git] / target / linux / generic / backport-5.15 / 834-v6.8-0010-nvmem-core-add-nvmem_dev_size-helper.patch

diff --git a/target/linux/generic/backport-5.15/834-v6.8-0010-nvmem-core-add-nvmem_dev_size-helper.patch b/target/linux/generic/backport-5.15/834-v6.8-0010-nvmem-core-add-nvmem_dev_size-helper.patch
new file mode 100644 (file)
index 0000000..aa0bbaa
--- /dev/null
+++ b/target/linux/generic/backport-5.15/834-v6.8-0010-nvmem-core-add-nvmem_dev_size-helper.patch
@@ -0,0 +1,53 @@
+From 33cf42e68efc8ff529a7eee08a4f0ba8c8d0a207 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 21 Dec 2023 18:34:17 +0100
+Subject: [PATCH] nvmem: core: add nvmem_dev_size() helper
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This is required by layouts that need to read whole NVMEM content. It's
+especially useful for NVMEM devices without hardcoded layout (like
+U-Boot environment data block).
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/r/20231221173421.13737-2-zajec5@gmail.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/nvmem/core.c           | 13 +++++++++++++
+ include/linux/nvmem-consumer.h |  1 +
+ 2 files changed, 14 insertions(+)
+
+--- a/drivers/nvmem/core.c
++++ b/drivers/nvmem/core.c
+@@ -2164,6 +2164,19 @@ const char *nvmem_dev_name(struct nvmem_
+ }
+ EXPORT_SYMBOL_GPL(nvmem_dev_name);
+ 
++/**
++ * nvmem_dev_size() - Get the size of a given nvmem device.
++ *
++ * @nvmem: nvmem device.
++ *
++ * Return: size of the nvmem device.
++ */
++size_t nvmem_dev_size(struct nvmem_device *nvmem)
++{
++      return nvmem->size;
++}
++EXPORT_SYMBOL_GPL(nvmem_dev_size);
++
+ static int __init nvmem_init(void)
+ {
+       int ret;
+--- a/include/linux/nvmem-consumer.h
++++ b/include/linux/nvmem-consumer.h
+@@ -81,6 +81,7 @@ int nvmem_device_cell_write(struct nvmem
+                           struct nvmem_cell_info *info, void *buf);
+ 
+ const char *nvmem_dev_name(struct nvmem_device *nvmem);
++size_t nvmem_dev_size(struct nvmem_device *nvmem);
+ 
+ void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries,
+                           size_t nentries);