kernel.git/drivers/nvmem/rmem.c, branch linux-5.18.yHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-5.18.y2021-02-04T16:04:18Znvmem: Add driver to expose reserved memory as nvmem2021-02-04T16:04:18ZNicolas Saenz Julienne2021-01-29T17:14:29Zurn:sha1:5a3fa75a4d9cb6bcfc9081ef224a4cdcd4b3eafe
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>