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From: Saravana Kannan <saravanak@google.com>
To: Georgi Djakov <georgi.djakov@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
	Stephen Boyd <sboyd@kernel.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Saravana Kannan <saravanak@google.com>,
	vincent.guittot@linaro.org, seansw@qti.qualcomm.com,
	daidavid1@codeaurora.org, Rajendra Nayak <rnayak@codeaurora.org>,
	sibis@codeaurora.org, bjorn.andersson@linaro.org,
	evgreen@chromium.org, kernel-team@android.com,
	linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 1/6] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings
Date: Tue,  2 Jul 2019 18:10:15 -0700	[thread overview]
Message-ID: <20190703011020.151615-2-saravanak@google.com> (raw)
In-Reply-To: <20190703011020.151615-1-saravanak@google.com>

Interconnects often quantify their performance points in terms of
bandwidth. So, add opp-peak-KBps (required) and opp-avg-KBps (optional) to
allow specifying Bandwidth OPP tables in DT.

opp-peak-KBps is a required property that replace opp-hz for Bandwidth OPP
tables.

opp-avg-KBps is an optional property that can be used in Bandwidth OPP
tables.

Signed-off-by: Saravana Kannan <saravanak@google.com>
---
 Documentation/devicetree/bindings/opp/opp.txt | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
index 76b6c79604a5..c869e87caa2a 100644
--- a/Documentation/devicetree/bindings/opp/opp.txt
+++ b/Documentation/devicetree/bindings/opp/opp.txt
@@ -83,9 +83,14 @@ properties.
 
 Required properties:
 - opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. This is a
-  required property for all device nodes but devices like power domains. The
-  power domain nodes must have another (implementation dependent) property which
-  uniquely identifies the OPP nodes.
+  required property for all device nodes but for devices like power domains or
+  bandwidth opp tables. The power domain nodes must have another (implementation
+  dependent) property which uniquely identifies the OPP nodes. The interconnect
+  opps are required to have the opp-peak-bw property.
+
+- opp-peak-KBps: Peak bandwidth in kilobytes per second, expressed as a 32-bit
+  big-endian integer. This is a required property for all devices that don't
+  have opp-hz. For example, bandwidth OPP tables for interconnect paths.
 
 Optional properties:
 - opp-microvolt: voltage in micro Volts.
@@ -132,6 +137,10 @@ Optional properties:
 - opp-level: A value representing the performance level of the device,
   expressed as a 32-bit integer.
 
+- opp-avg-KBps: Average bandwidth in kilobytes per second, expressed as a
+  32-bit big-endian integer. This property is only meaningful in OPP tables
+  where opp-peak-KBps is present.
+
 - clock-latency-ns: Specifies the maximum possible transition latency (in
   nanoseconds) for switching to this OPP from any other OPP.
 
-- 
2.22.0.410.gd8fdbe21b5-goog

  reply	other threads:[~2019-07-03  1:10 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-03  1:10 [PATCH v3 0/6] Introduce Bandwidth OPPs for interconnect paths Saravana Kannan
2019-07-03  1:10 ` Saravana Kannan [this message]
2019-07-16 17:25   ` [PATCH v3 1/6] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings Sibi Sankar
2019-07-16 18:58     ` Saravana Kannan
2019-07-22 23:35       ` Rob Herring
2019-07-22 23:40         ` Saravana Kannan
2019-07-23 14:26           ` Rob Herring
2019-07-24  0:18             ` Saravana Kannan
2019-07-17  7:54   ` Viresh Kumar
2019-07-17 20:29     ` Saravana Kannan
2019-07-18  4:35       ` Viresh Kumar
2019-07-18 17:26         ` Saravana Kannan
2019-07-26 16:24   ` Georgi Djakov
2019-07-26 19:08     ` Saravana Kannan
2019-07-03  1:10 ` [PATCH v3 2/6] OPP: Add support for bandwidth OPP tables Saravana Kannan
2019-07-16 17:33   ` Sibi Sankar
2019-07-16 19:10     ` Saravana Kannan
2019-07-30 10:57   ` Amit Kucheria
2019-07-30 23:20     ` Saravana Kannan
2019-07-03  1:10 ` [PATCH v3 3/6] OPP: Add helper function " Saravana Kannan
2019-07-03  1:10 ` [PATCH v3 4/6] OPP: Add API to find an OPP table from its DT node Saravana Kannan
2019-07-03  1:10 ` [PATCH v3 5/6] dt-bindings: interconnect: Add interconnect-opp-table property Saravana Kannan
2019-07-22 23:39   ` Rob Herring
2019-07-22 23:43     ` Saravana Kannan
2019-07-23  2:21     ` Viresh Kumar
2019-07-03  1:10 ` [PATCH v3 6/6] interconnect: Add OPP table support for interconnects Saravana Kannan
2019-07-03  6:45   ` Vincent Guittot
2019-07-03 21:33     ` Saravana Kannan
2019-07-04  7:12       ` Vincent Guittot
2019-07-07 21:48         ` Saravana Kannan
2019-07-09  7:25           ` Vincent Guittot
2019-07-09 19:02             ` Saravana Kannan
2019-07-15  8:16               ` Vincent Guittot
2019-07-16  0:55                 ` Saravana Kannan
2019-07-24  7:16                   ` Vincent Guittot
2019-07-26 16:25   ` Georgi Djakov
2019-07-26 19:08     ` Saravana Kannan
2019-07-03  6:36 ` [PATCH v3 0/6] Introduce Bandwidth OPPs for interconnect paths Viresh Kumar
2019-07-03 20:35   ` Saravana Kannan
2019-07-17 10:32 ` Viresh Kumar
2019-07-17 20:34   ` Saravana Kannan
2019-07-18  5:37     ` Viresh Kumar
2019-07-19  4:12       ` Saravana Kannan
2019-07-29  9:24         ` Viresh Kumar
2019-07-29 20:12           ` Saravana Kannan
2019-07-30  3:01             ` Viresh Kumar
2019-08-03  1:20               ` Saravana Kannan
2019-08-03  7:36               ` Saravana Kannan

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