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