From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Andy Gross <andy.gross@linaro.org>,
David Brown <david.brown@linaro.org>,
Sibi Sankar <sibis@codeaurora.org>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 04/10] dt-bindings: soc: qcom: Add AOSS QMP binding
Date: Mon, 21 Jan 2019 21:51:06 -0800 [thread overview]
Message-ID: <20190122055112.30943-5-bjorn.andersson@linaro.org> (raw)
In-Reply-To: <20190122055112.30943-1-bjorn.andersson@linaro.org>
Add binding for the QMP based side-channel communication mechanism to
the AOSS, which is used to control resources not exposed through the
RPMh interface.
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
Changes since v2:
- Update indentation of example
- Add colling device subnodes to the description
.../bindings/soc/qcom/qcom,aoss-qmp.txt | 75 +++++++++++++++++++
include/dt-bindings/power/qcom-aoss-qmp.h | 15 ++++
2 files changed, 90 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
create mode 100644 include/dt-bindings/power/qcom-aoss-qmp.h
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
new file mode 100644
index 000000000000..881dc8c7907a
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
@@ -0,0 +1,75 @@
+Qualcomm Always-On Subsystem side channel binding
+
+This binding describes the hardware component responsible for side channel
+requests to the always-on subsystem (AOSS), used for certain power management
+requests that is not handled by the standard RPMh interface. Each client in the
+SoC has it's own block of message RAM and IRQ for communication with the AOSS.
+The protocol used to communicate in the message RAM is known as QMP.
+
+The AOSS side channel exposes control over a set of resources, used to control
+a set of debug related clocks and to affect the low power state of resources
+related to the secondary subsystems. These resources are exposed as a set of
+power-domains.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be "qcom,sdm845-aoss-qmp"
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: the base address and size of the message RAM for this
+ client's communication with the AOSS
+
+- interrupts:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: should specify the AOSS message IRQ for this client
+
+- mboxes:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: reference to the mailbox representing the outgoing doorbell
+ in APCS for this client, as described in mailbox/mailbox.txt
+
+- #power-domain-cells:
+ Usage: optional
+ Value type: <u32>
+ Definition: must be 1
+ The provided power-domains are:
+ QDSS clock-domain (0), CDSP state (1), LPASS state (2),
+ modem state (3), SLPI state (4), SPSS state (5) and Venus
+ state (6).
+
+= SUBNODES
+The AOSS side channel also provides the controls for three cooling devices,
+these are expressed as subnodes of the QMP node. The name of the node is used
+to identify the resource and must therefor be "cx", "mx" or "ebi".
+
+- #cooling-cells:
+ Usage: optional
+ Value type: <u32>
+ Definition: must be 2
+
+= EXAMPLE
+
+The following example represents the AOSS side-channel message RAM and the
+mechanism exposing the power-domains, as found in SDM845.
+
+ aoss_qmp: qmp@c300000 {
+ compatible = "qcom,sdm845-aoss-qmp";
+ reg = <0x0c300000 0x100000>;
+ interrupts = <GIC_SPI 389 IRQ_TYPE_EDGE_RISING>;
+ mboxes = <&apss_shared 0>;
+
+ #power-domain-cells = <1>;
+
+ cx_cdev: cx {
+ #cooling-cells = <2>;
+ };
+
+ mx_cdev: mx {
+ #cooling-cells = <2>;
+ };
+ };
diff --git a/include/dt-bindings/power/qcom-aoss-qmp.h b/include/dt-bindings/power/qcom-aoss-qmp.h
new file mode 100644
index 000000000000..7d8ac1a4f90c
--- /dev/null
+++ b/include/dt-bindings/power/qcom-aoss-qmp.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2018, Linaro Ltd. */
+
+#ifndef __DT_BINDINGS_POWER_QCOM_AOSS_QMP_H
+#define __DT_BINDINGS_POWER_QCOM_AOSS_QMP_H
+
+#define AOSS_QMP_QDSS_CLK 0
+#define AOSS_QMP_LS_CDSP 1
+#define AOSS_QMP_LS_LPASS 2
+#define AOSS_QMP_LS_MODEM 3
+#define AOSS_QMP_LS_SLPI 4
+#define AOSS_QMP_LS_SPSS 5
+#define AOSS_QMP_LS_VENUS 6
+
+#endif
--
2.18.0
next prev parent reply other threads:[~2019-01-22 5:52 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-22 5:51 [PATCH v3 00/10] Qualcomm AOSS QMP driver and modem dts Bjorn Andersson
2019-01-22 5:51 ` [PATCH v3 01/10] arm64: dts: qcom: sdm845: Update PIL region memory map Bjorn Andersson
2019-01-22 18:58 ` Stephen Boyd
2019-01-22 19:24 ` Bjorn Andersson
2019-01-22 23:10 ` Doug Anderson
2019-01-23 0:30 ` Bjorn Andersson
2019-01-22 23:16 ` Doug Anderson
2019-01-23 0:39 ` Bjorn Andersson
2019-01-25 17:40 ` Sibi Sankar
2019-01-22 5:51 ` [PATCH v3 02/10] arm64: dts: qcom: sdm845: Define rmtfs memory Bjorn Andersson
2019-01-22 23:26 ` Doug Anderson
2019-01-22 23:34 ` Brian Norris
2019-01-23 0:47 ` Bjorn Andersson
2019-01-22 5:51 ` [PATCH v3 03/10] arm64: dts: sdm845: Introduce ADSP and CDSP PAS nodes Bjorn Andersson
2019-01-22 23:46 ` Doug Anderson
2019-01-23 0:26 ` Bjorn Andersson
2019-01-23 0:40 ` Doug Anderson
2019-01-23 1:09 ` Bjorn Andersson
2019-01-23 23:24 ` Doug Anderson
2019-01-24 6:22 ` Stephen Boyd
2019-01-22 5:51 ` Bjorn Andersson [this message]
2019-01-22 19:04 ` [PATCH v3 04/10] dt-bindings: soc: qcom: Add AOSS QMP binding Stephen Boyd
2019-01-22 19:25 ` Bjorn Andersson
2019-01-22 19:28 ` Stephen Boyd
2019-01-22 5:51 ` [PATCH v3 05/10] soc: qcom: Add AOSS QMP communication driver Bjorn Andersson
2019-01-22 5:51 ` [PATCH v3 06/10] soc: qcom: Add AOSS QMP genpd provider Bjorn Andersson
2019-01-22 5:51 ` [PATCH v3 07/10] remoteproc: q6v5-mss: Vote for rpmh power domains Bjorn Andersson
2019-01-23 0:01 ` Doug Anderson
2019-01-22 5:51 ` [PATCH v3 08/10] remoteproc: q6v5-mss: Active powerdomain for SDM845 Bjorn Andersson
2019-01-22 5:51 ` [PATCH v3 09/10] arm64: dts: qcom: Add AOSS QMP node Bjorn Andersson
2019-01-22 5:51 ` [PATCH v3 10/10] arm64: dts: qcom: sdm845: Add Q6V5 MSS node Bjorn Andersson
2019-01-23 0:28 ` Doug Anderson
2019-01-23 1:10 ` Bjorn Andersson
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