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
next prev parent 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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