Commit 49d37c6b authored by PrasannaKumar Muralidharan's avatar PrasannaKumar Muralidharan Committed by Greg Kroah-Hartman
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Documentation: ABI: nvmem: add documentation for JZ4780 efuse ABI 



This patch brings support for the JZ4780 efuse. Currently it only exposes
a read only access to the entire 8K bits efuse memory.

Tested-by: default avatarMathieu Malaterre <malat@debian.org>
Signed-off-by: default avatarPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: default avatarMathieu Malaterre <malat@debian.org>
Reviewed-by: default avatarPaul Cercueil <paul@crapouillou.net>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200310132257.23358-14-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4a2addc2

Documentation/ABI/testing/sysfs-driver-jz4780-efuse

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What:		/sys/devices/*/<our-device>/nvmem

Date:		December 2017

Contact:	PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>

Description:	read-only access to the efuse on the Ingenic JZ4780 SoC

		The SoC has a one time programmable 8K efuse that is

		split into segments. The driver supports read only.

		The segments are

		0x000   64 bit Random Number

		0x008  128 bit Ingenic Chip ID

		0x018  128 bit Customer ID

		0x028 3520 bit Reserved

		0x1E0    8 bit Protect Segment

		0x1E1 2296 bit HDMI Key

		0x300 2048 bit Security boot key

Users:		any user space application which wants to read the Chip

		and Customer ID

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