--- a/drivers/firmware/broadcom/bcm47xx_nvram.c	2023-02-05 13:19:33.299888563 +0100
+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c	2023-02-05 13:22:28.556220624 +0100
@@ -164,6 +164,20 @@
 	return -ENXIO;
 }

+int bcm47xx_nvram_read(unsigned int offset, char *val, size_t val_len)
+{
+	if (!nvram_len)
+		return -ENXIO;
+
+	if ((offset+val_len) > nvram_len)
+		return -EINVAL;
+
+	while (val_len--)
+		*val++ = nvram_buf[offset++];
+
+	return 0;
+}
+
 int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
 {
 	char *var, *value, *end, *eq;
--- a/include/linux/bcm47xx_nvram.h	2023-02-05 13:03:29.604243964 +0100
+++ b/include/linux/bcm47xx_nvram.h	2023-02-05 13:18:34.899663357 +0100
@@ -20,6 +20,7 @@
 {
 	vfree(nvram);
 };
+int bcm47xx_nvram_read(unsigned int offset, char *val, size_t val_len);
 #else
 static inline int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start,
 						size_t res_size)
@@ -48,6 +49,11 @@
 static inline void bcm47xx_nvram_release_contents(char *nvram)
 {
 };
+
+static inline int bcm47xx_nvram_read(unsigned int offset, char *val, size_t val_len)
+{
+	return -ENOTSUPP;
+}:
 #endif

 #endif /* __BCM47XX_NVRAM_H */
--- a/drivers/nvmem/brcm_nvram.c	2023-02-05 14:58:33.089372758 +0100
+++ b/drivers/nvmem/brcm_nvram.c	2023-02-05 15:03:03.862249690 +0100
@@ -12,6 +12,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <linux/vmalloc.h>

 #define NVRAM_MAGIC			"FLSH"

@@ -30,9 +31,17 @@
 	__le32 config_ncdl;	/* ncdl values for memc */
 };

+int bcm47xx_nvram_read(unsigned int offset, char *val, size_t val_len);
+
 static int brcm_nvram_read(void *context, unsigned int offset, void *val,
 			   size_t bytes)
 {
+#ifdef CONFIG_BCM47XX_NVRAM
+
+	return bcm47xx_nvram_read(offset, val, bytes);
+
+#else
+
 	struct brcm_nvram *priv = context;
 	u8 *dst = val;

@@ -40,6 +49,8 @@
 		*dst++ = readb(priv->base + offset++);

 	return 0;
+
+#endif
 }

 static int brcm_nvram_add_cells(struct brcm_nvram *priv, uint8_t *data,