linux-kernel - [RFC PATCH 2/4] dt-bindings: ufs: common: allow OPP table

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Date:   Fri,  1 Apr 2022 16:58:18 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Bean Huo <beanhuo@...ron.com>,
        Bart Van Assche <bvanassche@....org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [RFC PATCH 2/4] dt-bindings: ufs: common: allow OPP table

Except scaling UFS and bus clocks, it's necessary to scale also the
voltages of regulators or power domain performance state levels.  Adding
Operating Performance Points table allows to adjust power domain
performance state, depending on the UFS clock speed.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 Documentation/devicetree/bindings/ufs/ufs-common.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/ufs/ufs-common.yaml b/Documentation/devicetree/bindings/ufs/ufs-common.yaml
index 47a4e9e1a775..ce767bfbf05a 100644
--- a/Documentation/devicetree/bindings/ufs/ufs-common.yaml
+++ b/Documentation/devicetree/bindings/ufs/ufs-common.yaml
@@ -26,6 +26,9 @@ properties:
       array is "0" then it is assumed that the frequency is set by the parent
       clock or a fixed rate clock source.
 
+  operating-points-v2: true
+  opp-table: true
+
   interrupts:
     maxItems: 1
 
@@ -75,6 +78,7 @@ properties:
 
 dependencies:
   freq-table-hz: [ 'clocks' ]
+  operating-points-v2: [ 'freq-table-hz' ]
 
 required:
   - interrupts
-- 
2.32.0