From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752381AbeDJR5j (ORCPT ); Tue, 10 Apr 2018 13:57:39 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:33640 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752163AbeDJR5d (ORCPT ); Tue, 10 Apr 2018 13:57:33 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3AD9860D81 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=ilina@codeaurora.org From: Lina Iyer To: andy.gross@linaro.org, david.brown@linaro.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org Cc: rnayak@codeaurora.org, bjorn.andersson@linaro.org, linux-kernel@vger.kernel.org, sboyd@kernel.org, evgreen@chromium.org, dianders@chromium.org, Lina Iyer , devicetree@vger.kernel.org, Mahesh Sivasubramanian Subject: [PATCH v8 2/2] dt-bindings: introduce Command DB for QCOM SoCs Date: Tue, 10 Apr 2018 11:57:24 -0600 Message-Id: <20180410175724.7165-3-ilina@codeaurora.org> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20180410175724.7165-1-ilina@codeaurora.org> References: <20180410175724.7165-1-ilina@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mahesh Sivasubramanian Command DB provides information on shared resources like clocks, regulators etc., probed at boot by the remote subsytem and made available in shared memory. Cc: devicetree@vger.kernel.org Signed-off-by: Mahesh Sivasubramanian Signed-off-by: Lina Iyer Reviewed-by: Bjorn Andersson Reviewed-by: Rob Herring Reviewed-by: Stephen Boyd Reviewed-by: Evan Green --- Changes in v8: - Fix node name - Add no-map property Changes in v7: - Fix description of 'reg' property Changes in v6: - Move to bindings/reserved-memory - Remove indirection address and use only the actual reserved memory Changes in v4: - Fix unwanted capitalization - Add reg property --- .../bindings/reserved-memory/qcom,cmd-db.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt b/Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt new file mode 100644 index 000000000000..68395530c0a5 --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/qcom,cmd-db.txt @@ -0,0 +1,37 @@ +Command DB +--------- + +Command DB is a database that provides a mapping between resource key and the +resource address for a system resource managed by a remote processor. The data +is stored in a shared memory region and is loaded by the remote processor. + +Some of the Qualcomm Technologies Inc SoC's have hardware accelerators for +controlling shared resources. Depending on the board configuration the shared +resource properties may change. These properties are dynamically probed by the +remote processor and made available in the shared memory. + +The bindings for Command DB is specified in the reserved-memory section in +devicetree. The devicetree representation of the command DB driver should be: + +Properties: +- compatible: + Usage: required + Value type: + Definition: Should be "qcom,cmd-db" + +- reg: + Usage: required + Value type: + Definition: The register address that points to the actual location of + the Command DB in memory. + +Example: + + reserved-memory { + [...] + reserved-memory@85fe0000 { + reg = <0x0 0x85fe0000 0x0 0x20000>; + compatible = "qcom,cmd-db"; + no-map; + }; + }; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project