mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
101 lines
3.2 KiB
Diff
101 lines
3.2 KiB
Diff
From a5be5ce0e25439fae3cd42e3d775979547926812 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
|
|
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 <hauke@hauke-m.de>
|
|
Cc: linux-mips@vger.kernel.org
|
|
Cc: Florian Fainelli <f.fainelli@gmail.com>
|
|
Cc: bcm-kernel-feedback-list@broadcom.com
|
|
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
|
|
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
|
|
[Added an export for modules potentially using the init symbol]
|
|
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
|
|
Link: https://lore.kernel.org/r/20221103082529.359084-1-linus.walleij@linaro.org
|
|
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
---
|
|
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 <rafal@milecki.pl>
|
|
*/
|
|
|
|
+#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;
|