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From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Andy Gross <andy.gross@linaro.org>, David Brown <david.brown@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Ohad Ben-Cohen <ohad@wizery.com>,
	Arun Kumar Neelakantam <aneela@codeaurora.org>,
	Sibi Sankar <sibis@codeaurora.org>,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org
Subject: [PATCH v5 04/10] dt-bindings: soc: qcom: Add AOSS QMP binding
Date: Wed, 30 Jan 2019 16:39:27 -0800
Message-ID: <20190131003933.11436-5-bjorn.andersson@linaro.org> (raw)
In-Reply-To: <20190131003933.11436-1-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 v4:
- None

Changes since v3:
- Spelled out QMP

 .../bindings/soc/qcom/qcom,aoss-qmp.txt       | 76 +++++++++++++++++++
 include/dt-bindings/power/qcom-aoss-qmp.h     | 15 ++++
 2 files changed, 91 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..9ce6c42192ad
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
@@ -0,0 +1,76 @@
+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 Qualcomm
+Messagin Protocol (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


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-31  0:39 [PATCH v5 00/10] Qualcomm AOSS QMP driver and modem dts Bjorn Andersson
2019-01-31  0:39 ` [PATCH v5 01/10] arm64: dts: qcom: sdm845: Update reserved memory map Bjorn Andersson
2019-01-31 16:58   ` Sibi Sankar
2019-01-31  0:39 ` [PATCH v5 02/10] arm64: dts: qcom: sdm845: Define rmtfs memory Bjorn Andersson
2019-01-31 17:09   ` Sibi Sankar
2019-01-31  0:39 ` [PATCH v5 03/10] arm64: dts: sdm845: Introduce ADSP and CDSP PAS nodes Bjorn Andersson
2019-02-01  5:49   ` Sibi Sankar
2019-02-01 23:54   ` Doug Anderson
2019-01-31  0:39 ` Bjorn Andersson [this message]
2019-01-31  0:39 ` [PATCH v5 05/10] soc: qcom: Add AOSS QMP communication driver Bjorn Andersson
2019-02-01 23:36   ` Doug Anderson
2019-02-06  1:33     ` Bjorn Andersson
2019-01-31  0:39 ` [PATCH v5 06/10] soc: qcom: Add AOSS QMP genpd provider Bjorn Andersson
2019-02-01  7:15   ` Sibi Sankar
2019-02-01 23:39   ` Doug Anderson
2019-01-31  0:39 ` [PATCH v5 07/10] remoteproc: q6v5-mss: Vote for rpmh power domains Bjorn Andersson
2019-01-31  4:51   ` Bjorn Andersson
2019-01-31  0:39 ` [PATCH v5 08/10] remoteproc: q6v5-mss: Active powerdomain for SDM845 Bjorn Andersson
2019-01-31  4:51   ` Bjorn Andersson
2019-01-31  0:39 ` [PATCH v5 09/10] arm64: dts: qcom: Add AOSS QMP node Bjorn Andersson
2019-02-01  7:17   ` Sibi Sankar
2019-01-31  0:39 ` [PATCH v5 10/10] arm64: dts: qcom: sdm845: Add Q6V5 MSS node Bjorn Andersson

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