On Tuesday 10 June 2014 15:47:16 Boris BREZILLON wrote:
>
> +config I2C_SUN6I_P2WI
> + tristate "Allwinner sun6i internal P2WI controller"
> + depends on ARCH_SUNXI
> + help
> + If you say yes to this option, support will be included for the
> + P2WI (Push/Pull 2 Wire Interface) controller embedded in some sunxi
> + SOCs.
> + The P2WI looks like an SMBus controller (which supports only byte
> + accesses), except that it only supports one slave device.
> + This interface is used to connect to specific PMIC devices (like the
> + AXP221).
> +
Sorry for the stupid question, but why is this an i2c driver if the
hardware protocol is completely different?
I understand that a lot of devices can be driven using either spi or
i2c, and we have two sets of {directories,maintainers,bus_types,...}
for them. Your description sounds like this is a separate option
that isn't any closer to i2c than it is to spi.
Would it perhaps be better to expose it only as a regmap rather than
an i2c host?
Arnd
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