From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rajendra Nayak <rnayak@codeaurora.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 15:14:38 +0530 [thread overview]
Message-ID: <20180530094438.xnyukvhum7tc6roh@vireshk-i7> (raw)
In-Reply-To: <36822404-bdf5-1915-03e7-e5ffcff05c9b@codeaurora.org>
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:
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);
next prev parent reply other threads:[~2018-05-30 9:44 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 [this message]
2018-05-30 10:07 ` Rajendra Nayak
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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