nvmem: airoha: Add support for SMC eFUSE

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Add support for SMC eFUSE on AN7581 SoC. The SoC have 2 set of 2048 bits of
eFUSE that are used to read calibration value for PCIe, Thermal, USB and
other specific info of the SoC like revision and HW device present.

eFuse value are taken by sending SMC command. ATF is responsible of
validaing the data and rejecting reading protected data (like Private
Key). In such case the SMC command will return non-zero value on a0
register.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260530205333.117458-12-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Christian Marangi 2026-05-30 21:53:30 +01:00 • committed by Greg Kroah-Hartman

parent 2956111189

commit b7846af2e6

3 changed files with 140 additions and 0 deletions

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13

drivers/nvmem/Kconfig

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2

drivers/nvmem/Makefile

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125

drivers/nvmem/airoha-smc-efuses.c

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