kernel: use upstream firmware patch for Broadcom's NVRAM

This replaces our 2 downstream patches.

Signed-off-by: Rafał Miłecki <[email protected]>

target/linux/bcm53xx/patches-5.15/800-0001-firmware-bcm47xx_nvram-support-init-from-IO-memory.patch

@@ -1,61 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
-Date: Thu, 11 Mar 2021 08:24:44 +0100
-Subject: [PATCH] firmware: bcm47xx_nvram: support init from IO memory
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Signed-off-by: Rafał Miłecki <[email protected]>
----
- drivers/firmware/broadcom/bcm47xx_nvram.c | 17 +++++++++++++++++
- include/linux/bcm47xx_nvram.h             |  6 ++++++
- 2 files changed, 23 insertions(+)
-
---- a/drivers/firmware/broadcom/bcm47xx_nvram.c
-+++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
-@@ -110,6 +110,23 @@ found:
- 	return 0;
- }
- 
-+int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start, size_t res_size)
-+{
-+	if (nvram_len) {
-+		pr_warn("nvram already initialized\n");
-+		return -EEXIST;
-+	}
-+
-+	if (!bcm47xx_nvram_is_valid(nvram_start)) {
-+		pr_err("No valid NVRAM found\n");
-+		return -ENOENT;
-+	}
-+
-+	bcm47xx_nvram_copy(nvram_start, res_size);
-+
-+	return 0;
-+}
-+
- /*
-  * On bcm47xx we need access to the NVRAM very early, so we can't use mtd
-  * subsystem to access flash. We can't even use platform device / driver to
---- a/include/linux/bcm47xx_nvram.h
-+++ b/include/linux/bcm47xx_nvram.h
-@@ -11,6 +11,7 @@
- #include <linux/vmalloc.h>
- 
- #ifdef CONFIG_BCM47XX_NVRAM
-+int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start, size_t res_size);
- int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
- int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
- int bcm47xx_nvram_gpio_pin(const char *name);
-@@ -20,6 +21,11 @@ static inline void bcm47xx_nvram_release
- 	vfree(nvram);
- };
- #else
-+static inline int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start,
-+						size_t res_size)
-+{
-+	return -ENOTSUPP;
-+}
- static inline int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
- {
- 	return -ENOTSUPP;

target/linux/bcm53xx/patches-5.15/800-0002-nvmem-brcm_nvram-provide-NVMEM-content-to-the-NVRAM-.patch

@@ -1,31 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
-Date: Thu, 11 Mar 2021 08:26:14 +0100
-Subject: [PATCH] nvmem: brcm_nvram: provide NVMEM content to the NVRAM driver
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Signed-off-by: Rafał Miłecki <[email protected]>
----
- drivers/nvmem/brcm_nvram.c | 3 +++
- 1 file changed, 3 insertions(+)
-
---- a/drivers/nvmem/brcm_nvram.c
-+++ b/drivers/nvmem/brcm_nvram.c
-@@ -3,6 +3,7 @@
-  * Copyright (C) 2021 Rafał Miłecki <[email protected]>
-  */
- 
-+#include <linux/bcm47xx_nvram.h>
- #include <linux/io.h>
- #include <linux/mod_devicetable.h>
- #include <linux/module.h>
-@@ -139,6 +140,8 @@ static int brcm_nvram_probe(struct platf
- 	if (err)
- 		return err;
- 
-+	bcm47xx_nvram_init_from_iomem(priv->base, resource_size(res));
-+
- 	config.dev = dev;
- 	config.cells = priv->cells;
- 	config.ncells = priv->ncells;

target/linux/generic/backport-5.15/812-v6.2-firmware-nvram-bcm47xx-support-init-from-IO-memory.patch

@@ -0,0 +1,100 @@
+From a5be5ce0e25439fae3cd42e3d775979547926812 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
+Date: Thu, 3 Nov 2022 09:25:29 +0100
+Subject: [PATCH] firmware/nvram: bcm47xx: support init from IO memory
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Provide NVMEM content to the NVRAM driver from a simple
+memory resource. This is necessary to use NVRAM in a memory-
+mapped flash device. Patch taken from OpenWrts development
+tree.
+
+This patch makes it possible to use memory-mapped NVRAM
+on the D-Link DWL-8610AP and the D-Link DIR-890L.
+
+Cc: Hauke Mehrtens <[email protected]>
+Cc: [email protected]
+Cc: Florian Fainelli <[email protected]>
+Cc: [email protected]
+Cc: Thomas Bogendoerfer <[email protected]>
+Signed-off-by: Rafał Miłecki <[email protected]>
+[Added an export for modules potentially using the init symbol]
+Signed-off-by: Linus Walleij <[email protected]>
+Link: https://lore.kernel.org/r/[email protected]
+Signed-off-by: Florian Fainelli <[email protected]>
+---
+ drivers/firmware/broadcom/bcm47xx_nvram.c | 18 ++++++++++++++++++
+ drivers/nvmem/brcm_nvram.c                |  3 +++
+ include/linux/bcm47xx_nvram.h             |  6 ++++++
+ 3 files changed, 27 insertions(+)
+
+--- a/drivers/firmware/broadcom/bcm47xx_nvram.c
++++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
+@@ -110,6 +110,24 @@ found:
+ 	return 0;
+ }
+ 
++int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start, size_t res_size)
++{
++	if (nvram_len) {
++		pr_warn("nvram already initialized\n");
++		return -EEXIST;
++	}
++
++	if (!bcm47xx_nvram_is_valid(nvram_start)) {
++		pr_err("No valid NVRAM found\n");
++		return -ENOENT;
++	}
++
++	bcm47xx_nvram_copy(nvram_start, res_size);
++
++	return 0;
++}
++EXPORT_SYMBOL_GPL(bcm47xx_nvram_init_from_iomem);
++
+ /*
+  * On bcm47xx we need access to the NVRAM very early, so we can't use mtd
+  * subsystem to access flash. We can't even use platform device / driver to
+--- a/drivers/nvmem/brcm_nvram.c
++++ b/drivers/nvmem/brcm_nvram.c
+@@ -3,6 +3,7 @@
+  * Copyright (C) 2021 Rafał Miłecki <[email protected]>
+  */
+ 
++#include <linux/bcm47xx_nvram.h>
+ #include <linux/io.h>
+ #include <linux/mod_devicetable.h>
+ #include <linux/module.h>
+@@ -139,6 +140,8 @@ static int brcm_nvram_probe(struct platf
+ 	if (err)
+ 		return err;
+ 
++	bcm47xx_nvram_init_from_iomem(priv->base, resource_size(res));
++
+ 	config.dev = dev;
+ 	config.cells = priv->cells;
+ 	config.ncells = priv->ncells;
+--- a/include/linux/bcm47xx_nvram.h
++++ b/include/linux/bcm47xx_nvram.h
+@@ -11,6 +11,7 @@
+ #include <linux/vmalloc.h>
+ 
+ #ifdef CONFIG_BCM47XX_NVRAM
++int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start, size_t res_size);
+ int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
+ int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
+ int bcm47xx_nvram_gpio_pin(const char *name);
+@@ -20,6 +21,11 @@ static inline void bcm47xx_nvram_release
+ 	vfree(nvram);
+ };
+ #else
++static inline int bcm47xx_nvram_init_from_iomem(void __iomem *nvram_start,
++						size_t res_size)
++{
++	return -ENOTSUPP;
++}
+ static inline int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
+ {
+ 	return -ENOTSUPP;