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authorRafał Miłecki <rafal@milecki.pl>2022-09-16 15:20:48 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-09-24 15:54:37 +0300
commitd5542923f200f95bddf524f36fd495f78aa28e3c (patch)
tree8799b30bf8035212bb1e5fbbd4ce09be95fc374a /drivers/nvmem/Makefile
parent42992cf187e4e4bcfe3c58f8fc7b1832c5652d9f (diff)
downloadlinux-d5542923f200f95bddf524f36fd495f78aa28e3c.tar.xz
nvmem: add driver handling U-Boot environment variables
U-Boot stores its setup as environment variables. It's a list of key-value pairs stored on flash device with a custom header. This commit adds an NVMEM driver that: 1. Provides NVMEM access to environment vars binary data 2. Extracts variables as NVMEM cells Current Linux's NVMEM sysfs API allows reading whole NVMEM data block. It can be used by user-space tools for reading U-Boot env vars block without the hassle of finding its location. Parsing will still need to be re-done there. Kernel-parsed NVMEM cells can be read however by Linux drivers. This may be useful for Ethernet drivers for reading device MAC address which is often stored as U-Boot env variable. Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20220916122100.170016-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem/Makefile')
-rw-r--r--drivers/nvmem/Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile
index c710b64f9fe4..399f9972d45b 100644
--- a/drivers/nvmem/Makefile
+++ b/drivers/nvmem/Makefile
@@ -69,3 +69,5 @@ obj-$(CONFIG_NVMEM_APPLE_EFUSES) += nvmem-apple-efuses.o
nvmem-apple-efuses-y := apple-efuses.o
obj-$(CONFIG_MICROCHIP_OTPC) += nvmem-microchip-otpc.o
nvmem-microchip-otpc-y := microchip-otpc.o
+obj-$(CONFIG_NVMEM_U_BOOT_ENV) += nvmem_u-boot-env.o
+nvmem_u-boot-env-y := u-boot-env.o