[PATCH v4 1/3] soc: devicetree: bindings: Add Qualcomm RPM DT binding

Bjorn Andersson bjorn at kryo.se
Wed Jul 16 15:20:40 PDT 2014

On Wed, Jul 16, 2014 at 3:06 AM, pramod gurav
<pramod.gurav.etc at gmail.com> wrote:
> Hi Bjorn,
> RPM breaks on IFC6410 without entry for 'qcom.ipc' node. Please find
> my observations below.
> On Wed, Jul 16, 2014 at 4:30 AM, Bjorn Andersson
> <bjorn.andersson at sonymobile.com> wrote:
>> +       rpm at 108000 {
>> +               compatible = "qcom,rpm-msm8960";
>> +               reg = <0x108000 0x1000>;
>> +               qcom,ipc = <&apcs 0x8 2>;
> Tried adding this but there is no reference to 'apcs' registers itself
> in any dts.
> Without these changes rpm breaks hence not able to test SATA which needs rpm.

Hi Pramod,

Unfortunately the ipc bits resides in a block that needs to be
accesses by various device drivers so I had to extract the access; so
you now need to reference it via a syscon handle and offset instead -
as described above.

The apcs node I used for testing this with looks like this:

apcs: syscon at 2011000 {
    compatible = "syscon";
    reg = <0x2011000 0x1000>;

Enable CONFIG_MFD_SYSCON and put the dt snippet somewhere under soc
and you should be good.


More information about the linux-arm-kernel mailing list