Re: [PATCH v5 6/8] dt-bindings: i2c: iproc: add "brcm,iproc-nic-i2c" compatible string

Wolfram Sang
2019-04-02T10:18:01Z

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> Note APE is a co-processor that is not visible from the Linux running
> from the host processor.
>
> "brcm,iproc-nic-i2c" here is introduced to allow the I2C port from APE
> to be completely owned by the host CPU, to meet the requirement of
> certain use cases. At the same time, the control of the I2C port from
> APE will be disabled.
>
> The "brcm,ape-hsls-addr-mask" defines the address translation and be
> programmed into some configuration registers to allow the host to
> directly access the I2C registers of APE. Note those configuration
> registers are owned by the host, and that address is not APE's address
> space nor the host is intending to take over the control of APE.
>
> Therefore, I think it makes way more sense to use an address mask type
> of DT property here.

Thanks for the explanation! Well, since Rob is already OK with it, then
so am I.

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