On 01/19/2018 05:49 PM, Tony Lindgren wrote:
> * Suman Anna <s-anna@xxxxxx> [180119 23:30]:
>> On 01/19/2018 03:33 PM, Tony Lindgren wrote:
>>> OK let's do some tests on that, I'll take a look at doing a dts
>>> file over next few weeks.
>>
>> You can look up the patches folder in the above repo, there are some
>> example nodes there already, they are rather straight-forward.
>
> Just for reference, here's what I played with but keep getting
> -EPROBE_DEFER somewhere during init.
Hmm, What's the baseline branch you are using - mainline, linux-next or
your for-next?
>
> Regards,
>
> Tony
>
> prm: prm@6000 {
> ...
> ranges = <0 0x6000 0x3000>;
>
> prm_dsp: prm@400 {
> compatible = "simple-bus";
> #address-cells = <1>;
> #size-cells = <1>;
> ranges = <0 0x400 0x100>;
>
> dsp_rstctrl: rstctrl@10 {
> compatible = "ti,rstctrl";
> reg = <0x10 0x4>;
> #reset-cells = <1>;
> };
> };
> ...
> };
>
> target-module@4a066000 {
> compatible = "ti,sysc-omap2", "ti,sysc";
> ti,hwmods = "mmu_dsp";
> reg = <0x4a066000 0x4>,
> <0x4a066010 0x4>,
> <0x4a066014 0x4>;
> reg-names = "rev", "sysc", "syss";
> ti,sysc-mask = <(SYSC_OMAP2_CLOCKACTIVITY |
> SYSC_OMAP2_SOFTRESET |
> SYSC_OMAP2_AUTOIDLE)>;
> ti,sysc-sidle = <SYSC_IDLE_FORCE>,
> <SYSC_IDLE_NO>,
> <SYSC_IDLE_SMART>;
> clocks = <&tesla_clkctrl OMAP4_DSP_CLKCTRL 0>;
> clock-names = "fck";
> resets = <&dsp_rstctrl 1>,
> <&dsp_rstctrl 0>;
> reset-names = "rst2", "rst1";
We definitely do not want the two resets here for sure, as the rst2
belongs to the dsp core (I believe it would be a sibling node to mmu_dsp
here), and cannot be released from reset without programming the MMU and
loading the code.
regards
Suman
> #address-cells = <1>;
> #size-cells = <1>;
> ranges = <0 0x4a066000 0x1000>;
>
> mmu_dsp: mmu@0 {
> compatible = "ti,omap4-iommu";
> reg = <0 0x100>;
> interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
> #iommu-cells = <0>;
> };
> };
>
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