From: Rajendra Nayak <rnayak@codeaurora.org>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: David Collins <collinsd@codeaurora.org>,
sboyd@kernel.org, andy.gross@linaro.org, ulf.hansson@linaro.org,
devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org, Lina Iyer <ilina@codeaurora.org>
Subject: Re: [PATCH v2 5/6] soc: qcom: rpmh powerdomain driver
Date: Wed, 30 May 2018 15:37:51 +0530 [thread overview]
Message-ID: <9b147942-8a6a-34c0-ba94-a6935b354b70@codeaurora.org> (raw)
In-Reply-To: <20180530094438.xnyukvhum7tc6roh@vireshk-i7>
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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next prev parent reply other threads:[~2018-05-30 10:07 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-25 10:01 [PATCH v2 0/6] Add powerdomain driver for corners on msm8996/sdm845 Rajendra Nayak
2018-05-25 10:01 ` [PATCH v2 1/6] soc: qcom: rpmpd: Add a powerdomain driver to model corners Rajendra Nayak
2018-05-30 9:17 ` Ulf Hansson
2018-05-30 10:14 ` Rajendra Nayak
2018-05-30 12:44 ` Ulf Hansson
2018-05-31 4:20 ` Rajendra Nayak
2018-05-31 11:09 ` Ulf Hansson
2018-05-30 18:27 ` David Collins
2018-05-31 3:53 ` Rajendra Nayak
2018-05-31 3:27 ` Rob Herring
2018-05-31 4:14 ` Rajendra Nayak
2018-05-25 10:01 ` [PATCH v2 2/6] dt-bindings: opp: Introduce qcom-opp bindings Rajendra Nayak
2018-05-25 22:33 ` David Collins
2018-05-29 9:49 ` Rajendra Nayak
2018-05-25 10:01 ` [PATCH v2 3/6] soc: qcom: rpmpd: Add support for get/set performance state Rajendra Nayak
2018-05-25 10:01 ` [PATCH v2 4/6] arm64: dts: msm8996: Add rpmpd device node Rajendra Nayak
2018-05-25 10:01 ` [PATCH v2 5/6] soc: qcom: rpmh powerdomain driver Rajendra Nayak
2018-05-26 1:08 ` David Collins
2018-05-29 10:19 ` Rajendra Nayak
2018-05-29 19:03 ` David Collins
2018-05-30 8:55 ` Rajendra Nayak
2018-05-30 9:44 ` Viresh Kumar
2018-05-30 10:07 ` Rajendra Nayak [this message]
2018-06-01 8:48 ` Rajendra Nayak
2018-06-01 19:19 ` David Collins
2018-06-13 18:29 ` Lina Iyer
2018-05-31 3:31 ` Rob Herring
2018-05-31 4:15 ` Rajendra Nayak
2018-05-25 10:01 ` [PATCH v2 6/6] soc: qcom: rpmpd/rpmhpd: Add a max vote on all corners at init Rajendra Nayak
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