Hi Sean,
Am 2022-02-08 17:02, schrieb Sean Anderson:
Should this be implemented on top of/as part of syscon/regmap? In Linux, all nvmem devices must also implement regmap support, making nvmem a subset of regmap drivers. There are certainly similarities, but I don't know if we want to make this depend on regmap.
What do you mean by that? I assume with "nvmem devices" you mean the nvmem providers. I've implemented the nvmem provider for MTD OTP devices in linux and there is no regmap support.
According to [1],
[The NVMEM] framework is based on regmap, so that most of the abstraction available in regmap can be reused, across multiple types of buses.
and
It is mandatory that the NVMEM provider has a regmap associated with its struct device. Failure to do would return error code from nvmem_register().
which seems to imply that NVMEM devices should also be regmaps.
Ahh I see. That seems to be outdated, see commit 795ddd18d38f9762fbfefceab9aa16caef0cf431 ("nvmem: core: remove regmap dependency").
-michael