On Fri, Jun 20, 2014 at 02:21:19PM +0200, Stanimir Varbanov wrote:
> Hello to all,
>
> The goal of this WIP set is to provide support for sub-functional
> hw blocks inside Qualcomm QPNP PMIC chips by creating a new qpnp
> bus (device-driver modeled). On SPMI interface we attach a so called
> Slaves. For example one PMIC chip like pm8941 has two slave id's. On
> every slaveid the PMIC chip has various peripherials. Every peripheral
> driver should expose qpnp_driver structure and implement the .probe
> and .remove callbacks. Every peripheral driver will reside on the
> proper place in /drivers directory.
>
> The fisrt patch describes the devicetree binding of the slave devices
> attached to the SPMI interface. The second patch adds implemetation of
> the qpnp-bus and a layer connection with the SPMI interface. The third
> patch adds spmi arbiter and underlying slaveid devicetree nodes for
> msm8974 SoC. The other patches are example of rtc-qpnp driver and
> binding documentation.
>
> Since this set is a WIP, it will be used as a starting point for future
> duscussions about implementing QPNP PMIC sub-function hw blocks.
Ok. I have a few critical problems with this approach to implementing
support for the PMICs:
- It's *way* more code than needed if done with of_platform_populate()
- AFAICT, the only direct relation between this and 'QPNP' is the 256
byte block size, which I would argue can be clearly expressed in DT
instead with #size-cells == 1, and #address-cells == 1
- The resource code from drivers/{base,of}/platform.c is reimplemented
here, without any added benefit
What am I missing?
-Courtney
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