From patchwork Mon Feb 26 17:58:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lina Iyer X-Patchwork-Id: 878013 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=codeaurora.org header.i=@codeaurora.org header.b="ELwap5IB"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="DFc0VA5Y"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zqqMF5yQKz9s1n for ; Tue, 27 Feb 2018 04:58:49 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751646AbeBZR6i (ORCPT ); Mon, 26 Feb 2018 12:58:38 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:44678 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751533AbeBZR6Y (ORCPT ); Mon, 26 Feb 2018 12:58:24 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 7CA4360F90; Mon, 26 Feb 2018 17:58:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1519667903; bh=/vc+oLp9Wk5EmDKrP5giJYoAjdwgKVnSi0QCy/DocI0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ELwap5IBGkafftTQjj5E0e8EM+1MbtQuR/1en88B1YiPXnF7pWSRK/OTeRggIrde2 mq/hw4ykGcO5EnDLYGLuEnlDgspHlLUVo3EFkloZA/gUaxMYDdTMIMsjrP5fkVRiDP DWLJDkWwzLdyWRo0ufDoq/zG2wFpPo2o6/zyJVqk= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED, T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from codeaurora.org (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: ilina@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id C467560115; Mon, 26 Feb 2018 17:58:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1519667901; bh=/vc+oLp9Wk5EmDKrP5giJYoAjdwgKVnSi0QCy/DocI0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DFc0VA5YWay4sdORgOdU1r/3K3s7wt/IH4J0100NAbFCldDiFDoDWclxlpd/lPBu7 XQPzRSWzQzK0ltmH7lNEOi6bhddvGLJW7DbwvCQfbOf4/o5mWnUJWlmCUQbqXOr/Z3 VCHjrQx/FxStRpiLM44KRiaxDqBVfc5rUTkbltpo= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C467560115 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, Lina Iyer , devicetree@vger.kernel.org, Mahesh Sivasubramanian Subject: [PATCH v4 2/2] dt-bindings: introduce Command DB for QCOM SoCs Date: Mon, 26 Feb 2018 10:58:02 -0700 Message-Id: <20180226175802.20052-3-ilina@codeaurora.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180226175802.20052-1-ilina@codeaurora.org> References: <20180226175802.20052-1-ilina@codeaurora.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@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: Rob Herring --- Changes in v4: - Fix unwanted capitalization - Add reg property --- .../devicetree/bindings/arm/msm/cmd-db.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/msm/cmd-db.txt diff --git a/Documentation/devicetree/bindings/arm/msm/cmd-db.txt b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt new file mode 100644 index 000000000000..5737ed2ac6e8 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/msm/cmd-db.txt @@ -0,0 +1,38 @@ +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 location of the + Command DB in memory. Additionally, specify the address + and size of the actual lacation in memory. + +Example: + + reserved-memory { + [...] + qcom,cmd-db@c3f000c { + reg = <0x0 0xc3f000c 0x0 0x8>, + <0x0 0x85fe0000 0x0 0x20000>; + compatible = "qcom,cmd-db"; + }; + };