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a5be5ce0e2
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>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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*/
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#ifndef __BCM47XX_NVRAM_H
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#define __BCM47XX_NVRAM_H
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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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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char *bcm47xx_nvram_get_contents(size_t *val_len);
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static inline void bcm47xx_nvram_release_contents(char *nvram)
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{
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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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};
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static inline int bcm47xx_nvram_getenv(const char *name, char *val,
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size_t val_len)
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{
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return -ENOTSUPP;
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};
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static inline int bcm47xx_nvram_gpio_pin(const char *name)
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{
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return -ENOTSUPP;
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};
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static inline char *bcm47xx_nvram_get_contents(size_t *val_len)
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{
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return NULL;
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};
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static inline void bcm47xx_nvram_release_contents(char *nvram)
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{
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};
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#endif
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#endif /* __BCM47XX_NVRAM_H */
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