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From: Rajendra Nayak <rnayak@codeaurora.org>
To: ulf.hansson@linaro.org, robh+dt@kernel.org, bjorn.andersson@linaro.org
Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	Rajendra Nayak <rnayak@codeaurora.org>
Subject: [PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property
Date: Tue,  4 Aug 2020 17:16:54 +0530	[thread overview]
Message-ID: <1596541616-27688-2-git-send-email-rnayak@codeaurora.org> (raw)
In-Reply-To: <1596541616-27688-1-git-send-email-rnayak@codeaurora.org>

While most devices within power-domains which support performance states,
scale the performance state dynamically, some devices might want to
set a static/default performance state while the device is active.
These devices typically would also run of a fixed clock and not support
dyamically scaling the device's performance, also known as DVFS techniques.
Add a property 'assigned-performance-states' which client devices can
use to set this default performance state on their power-domains.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
---
 .../devicetree/bindings/power/power-domain.yaml    | 47 ++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/power-domain.yaml b/Documentation/devicetree/bindings/power/power-domain.yaml
index ff5936e..48e9319 100644
--- a/Documentation/devicetree/bindings/power/power-domain.yaml
+++ b/Documentation/devicetree/bindings/power/power-domain.yaml
@@ -66,6 +66,16 @@ properties:
        by the given provider should be subdomains of the domain specified
        by this binding.
 
+  assigned-performance-states:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+       Some devices might need to configure their power domains in a default
+       performance state while the device is active. These devices typcially
+       would also run of a fixed clock and not support dyamically scaling the
+       device's performance, also known as DVFS techniques. The list of performance
+       state values should correspond to the list of power domains specified as part
+       of the power-domains property.
+
 required:
   - "#power-domain-cells"
 
@@ -129,3 +139,40 @@ examples:
             min-residency-us = <7000>;
         };
     };
+
+  - |
+    parent4: power-controller@12340000 {
+        compatible = "foo,power-controller";
+        reg = <0x12340000 0x1000>;
+        #power-domain-cells = <0>;
+    };
+
+    parent5: power-controller@43210000 {
+        compatible = "foo,power-controller";
+        reg = <0x43210000 0x1000>;
+        #power-domain-cells = <0>;
+        operating-points-v2 = <&power_opp_table>;
+
+        power_opp_table: opp-table {
+            compatible = "operating-points-v2";
+
+            power_opp_low: opp1 {
+                opp-level = <16>;
+            };
+
+            rpmpd_opp_ret: opp2 {
+                opp-level = <64>;
+            };
+
+            rpmpd_opp_svs: opp3 {
+                opp-level = <256>;
+            };
+        };
+    };
+
+    child4: consumer@12341000 {
+        compatible = "foo,consumer";
+        reg = <0x12341000 0x1000>;
+        power-domains = <&parent4>, <&parent5>;
+        assigned-performance-states = <0>, <256>;
+    };
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


  reply	other threads:[~2020-08-04 11:47 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-04 11:46 [PATCH 0/3] Add support for assigned-performance-states Rajendra Nayak
2020-08-04 11:46 ` Rajendra Nayak [this message]
2020-08-05  6:39   ` [PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property Stephen Boyd
2020-08-05  8:13     ` Rajendra Nayak
2020-08-05 23:57       ` Stephen Boyd
2020-08-04 11:46 ` [PATCH 2/3] PM / Domains: Add support for 'assigned-performance-states' Rajendra Nayak
2020-08-12  9:37   ` Ulf Hansson
2020-08-04 11:46 ` [PATCH 3/3] arm64: dts: sc7180: Add assigned-performance-states for i2c Rajendra Nayak
2020-08-05  6:41   ` Stephen Boyd
2020-08-05  8:14     ` Rajendra Nayak
2020-12-24 11:12 [PATCH 0/3] Add support for assigned-performance-states for geni i2c driver Roja Rani Yarubandi
2020-12-24 11:12 ` [PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property Roja Rani Yarubandi
2020-12-26  0:16   ` Rob Herring
2020-12-27 16:56   ` Rob Herring
2020-12-31 15:49   ` Rob Herring
2021-01-08  9:39     ` Ulf Hansson
2021-01-15 16:15   ` Bjorn Andersson
2021-01-18  5:39     ` Rajendra Nayak

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