linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Lukasz Luba <lukasz.luba@arm.com>
To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	dri-devel@lists.freedesktop.org
Cc: lukasz.luba@arm.com, robh@kernel.org, airlied@linux.ie, daniel@ffwll.ch
Subject: [PATCH 2/2] dt-bindings: mali-bifrost: Add dynamic-power-coefficient
Date: Wed,  9 Dec 2020 11:51:43 +0000	[thread overview]
Message-ID: <20201209115143.15321-3-lukasz.luba@arm.com> (raw)
In-Reply-To: <20201209115143.15321-1-lukasz.luba@arm.com>

Add a property dynamic-power-coefficient which allows to register Energy
Model for the Mali Bifrost devices.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
---
 .../bindings/gpu/arm,mali-bifrost.yaml          | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
index b1844b9c295d..184492162e7e 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
@@ -52,6 +52,23 @@ properties:
   "#cooling-cells":
     const: 2
 
+  dynamic-power-coefficient:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
+    description:
+      A u32 value that represents the running time dynamic
+      power coefficient in units of uW/MHz/V^2. The
+      coefficient can either be calculated from power
+      measurements or derived by analysis.
+
+      The dynamic power consumption of the GPU is
+      proportional to the square of the Voltage (V) and
+      the clock frequency (f). The coefficient is used to
+      calculate the dynamic power as below -
+
+      Pdyn = dynamic-power-coefficient * V^2 * f
+
+      where voltage is in V, frequency is in MHz.
+
 required:
   - compatible
   - reg
-- 
2.17.1


  parent reply	other threads:[~2020-12-09 11:53 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-09 11:51 [PATCH 0/2] Add DT bindings with dynamic-power-coefficient for Mali GPUs Lukasz Luba
2020-12-09 11:51 ` [PATCH 1/2] dt-bindings: mali-midgard: Add dynamic-power-coefficient Lukasz Luba
2020-12-14 22:06   ` Rob Herring
2020-12-09 11:51 ` Lukasz Luba [this message]
2020-12-14 22:06   ` [PATCH 2/2] dt-bindings: mali-bifrost: " Rob Herring

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201209115143.15321-3-lukasz.luba@arm.com \
    --to=lukasz.luba@arm.com \
    --cc=airlied@linux.ie \
    --cc=daniel@ffwll.ch \
    --cc=devicetree@vger.kernel.org \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=robh@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).