On 05/30/2018 03:14 PM, Viresh Kumar wrote:
> On 30-05-18, 14:25, Rajendra Nayak wrote:
>> []...
>>
>>>>> +Required Properties:
>>>>> + - compatible: Should be one of the following
>>>>> + * qcom,sdm845-rpmhpd: RPMh powerdomain for the sdm845 family of SoC
>>>>> + - power-domain-cells: number of cells in power domain specifier
>>>>> + must be 1
>>>>> + - operating-points-v2: Phandle to the OPP table for the power-domain.
>>>>> + Refer to Documentation/devicetree/bindings/power/power_domain.txt
>>>>> + and Documentation/devicetree/bindings/opp/qcom-opp.txt for more details
>>>>> +
>>>>> +Example:
>>>>> +
>>>>> + rpmhpd: power-controller {
>>>>> + compatible = "qcom,sdm845-rpmhpd";
>>>>> + #power-domain-cells = <1>;
>>>>> + operating-points-v2 = <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>,
>>>>> + <&rpmhpd_opp_table>;
>>>>
>>>> Can this be changed to simply:
>>>> operating-points-v2 = <&rpmhpd_opp_table>;
>>>>
>>>> The opp binding documentation [1] states that this should be ok:
>>>>
>>>> If only one phandle is available, then the same OPP table will be used
>>>> for all power domains provided by the power domain provider.
>>>
>>> thanks, I mentioned this to Viresh but didn't realize he fixed it up.
>>> Will remove the redundant entries.
>>
>> Looks like the kernel implementation does not handle this yet, and I get
>> an error adding the OPP tables for the powerdomains if I just specify
>> a single OPP table phandle.
>>
>> Viresh, is this expected with the latest patches in linux-next?
>>
>> It would be good if I can specify just one phandle instead of coping
>> the same phandle n times.
>
> Please try this untested hunk:
yes, seems to work.
> diff --git a/drivers/opp/of.c b/drivers/opp/of.c
> index 6d15f05bfc28..7af0ddec936b 100644
> --- a/drivers/opp/of.c
> +++ b/drivers/opp/of.c
> @@ -554,11 +554,24 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
> int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
> {
> struct device_node *opp_np;
> - int ret;
> + int ret, count;
>
> +again:
> opp_np = _opp_of_get_opp_desc_node(dev->of_node, index);
> - if (!opp_np)
> + if (!opp_np) {
> + /*
> + * If only one phandle is present, then the same OPP table
> + * applies for all index requests.
> + */
> + count = of_count_phandle_with_args(dev->of_node,
> + "operating-points-v2", NULL);
> + if (count == 1 && index) {
> + index = 0;
> + goto again;
> + }
> +
> return -ENODEV;
> + }
>
> ret = _of_add_opp_table_v2(dev, opp_np);
> of_node_put(opp_np);
>
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