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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>,
	MyungJoo Ham <myungjoo.ham@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>
Cc: Saravana Kannan <saravanak@google.com>,
	Rajendra Nayak <rnayak@codeaurora.org>,
	Jordan Crouse <jcrouse@codeaurora.org>,
	vincent.guittot@linaro.org, bjorn.andersson@linaro.org,
	amit.kucheria@linaro.org, seansw@qti.qualcomm.com,
	daidavid1@codeaurora.org, evgreen@chromium.org,
	sibis@codeaurora.org, kernel-team@android.com,
	linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 04/11] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings
Date: Thu, 13 Jun 2019 21:17:26 -0700
Message-ID: <20190614041733.120807-5-saravanak@google.com> (raw)
In-Reply-To: <20190614041733.120807-1-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.rc2.383.gf4fbbf30c2-goog


  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14  4:17 [PATCH v2 00/11] Introduce Bandwidth OPPs & interconnect devfreq driver Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 01/11] OPP: Allow required-opps even if the device doesn't have power-domains Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 02/11] OPP: Add function to look up required OPP's for a given OPP Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 03/11] PM / devfreq: Add required OPPs support to passive governor Saravana Kannan
2019-06-14  4:17 ` Saravana Kannan [this message]
2019-06-14  4:17 ` [PATCH v2 05/11] OPP: Add support for bandwidth OPP tables Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 06/11] OPP: Add helper function " Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 07/11] OPP: Add API to find an OPP table from its DT node Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 08/11] dt-bindings: interconnect: Add interconnect-opp-table property Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 09/11] interconnect: Add OPP table support for interconnects Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 10/11] OPP: Allow copying OPPs tables between devices Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 11/11] interconnect: Add devfreq support Saravana Kannan
2019-06-17 15:43   ` Georgi Djakov
2019-06-17 21:18     ` Saravana Kannan
2019-07-16 18:12       ` Sibi Sankar
2019-07-16 19:17         ` Saravana Kannan

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