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| author | Nicolas Saenz Julienne <nsaenzjulienne@suse.de> | 2021-01-29 20:14:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-04 19:04:18 +0300 |
| commit | 5a3fa75a4d9cb6bcfc9081ef224a4cdcd4b3eafe (patch) | |
| tree | b3509798015e8bfd5ba27046f99698638cfb4ec5 /drivers/nvmem/Kconfig | |
| parent | f90714e56cb6c5d1e57fb4385b107932f76ef94f (diff) | |
| download | linux-5a3fa75a4d9cb6bcfc9081ef224a4cdcd4b3eafe.tar.xz | |
nvmem: Add driver to expose reserved memory as nvmem
Firmware/co-processors might use reserved memory areas in order to pass
data stemming from an nvmem device otherwise non accessible to Linux.
For example an EEPROM memory only physically accessible to firmware, or
data only accessible early at boot time.
In order to expose this data to other drivers and user-space, the driver
models the reserved memory area as an nvmem device.
Tested-by: Tim Gover <tim.gover@raspberrypi.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210129171430.11328-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem/Kconfig')
| -rw-r--r-- | drivers/nvmem/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index 954d3b4a52ab..fecc19b884bf 100644 --- a/drivers/nvmem/Kconfig +++ b/drivers/nvmem/Kconfig @@ -270,4 +270,12 @@ config SPRD_EFUSE This driver can also be built as a module. If so, the module will be called nvmem-sprd-efuse. +config NVMEM_RMEM + tristate "Reserved Memory Based Driver Support" + help + This drivers maps reserved memory into an nvmem device. It might be + useful to expose information left by firmware in memory. + + This driver can also be built as a module. If so, the module + will be called nvmem-rmem. endif |