From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Andy Gross <andy.gross@linaro.org>,
David Brown <david.brown@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@armlinux.org.uk>,
Ulf Hansson <ulf.hansson@linaro.org>,
Arun Kumar Neelakantam <aneela@codeaurora.org>,
linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/7] dt-bindings: soc: qcom: Add AOSS QMP binding
Date: Sun, 6 Jan 2019 00:09:09 -0800 [thread overview]
Message-ID: <20190106080915.4493-2-bjorn.andersson@linaro.org> (raw)
In-Reply-To: <20190106080915.4493-1-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.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
Changes since v1:
- Don't describe power-domain as a separate child node
.../bindings/soc/qcom/qcom,aoss-qmp.txt | 57 +++++++++++++++++++
include/dt-bindings/power/qcom-aoss-qmp.h | 15 +++++
2 files changed, 72 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..9b0d9785efe0
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,aoss-qmp.txt
@@ -0,0 +1,57 @@
+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).
+
+= 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>;
+ };
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:[~2019-01-06 8:10 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-06 8:09 [PATCH v2 0/7] Qualcomm AOSS QMP side channel binding and driver Bjorn Andersson
2019-01-06 8:09 ` Bjorn Andersson [this message]
2019-01-11 22:10 ` [PATCH v2 1/7] dt-bindings: soc: qcom: Add AOSS QMP binding Rob Herring
2019-01-14 22:30 ` Stephen Boyd
2019-01-06 8:09 ` [PATCH v2 2/7] soc: qcom: Add AOSS QMP communication driver Bjorn Andersson
2019-01-10 12:48 ` Arun Kumar Neelakantam
2019-01-14 22:36 ` Stephen Boyd
2019-01-14 23:20 ` Bjorn Andersson
2019-01-06 8:09 ` [PATCH v2 3/7] soc: qcom: Add AOSS QMP genpd provider Bjorn Andersson
2019-01-10 4:59 ` Sai Prakash Ranjan
2019-01-14 22:40 ` Stephen Boyd
2019-01-14 23:29 ` Bjorn Andersson
2019-01-06 8:09 ` [PATCH v2 4/7] remoteproc: q6v5-mss: Vote for rpmh power domains Bjorn Andersson
2019-01-09 14:39 ` Sibi Sankar
2019-01-06 8:09 ` [PATCH v2 5/7] remoteproc: q6v5-mss: Active powerdomain for SDM845 Bjorn Andersson
2019-01-09 14:40 ` Sibi Sankar
2019-01-06 8:09 ` [PATCH v2 6/7] amba: Allow pclk to be controlled by power domain Bjorn Andersson
2019-01-06 8:09 ` [(RFC) PATCH v2 7/7] soc: qcom: aoss-qmp: Add cooling device support Bjorn Andersson
2019-01-11 22:11 ` Rob Herring
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