lkml.org 
[lkml]   [2020]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property
Date
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
\
 
 \ /
  Last update: 2020-08-04 13:48    [W:0.147 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site