From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753275AbaI3Nwm (ORCPT ); Tue, 30 Sep 2014 09:52:42 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:52105 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751851AbaI3Nwk convert rfc822-to-8bit (ORCPT ); Tue, 30 Sep 2014 09:52:40 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: [RFC 1/7] soc: qcom: Add device tree binding for SMEM From: Kumar Gala In-Reply-To: <1412037291-16880-2-git-send-email-bjorn.andersson@sonymobile.com> Date: Tue, 30 Sep 2014 08:52:35 -0500 Cc: Andy Gross , Arnd Bergmann , Grant Likely , Ian Campbell , Mark Rutland , Pawel Moll , Rob Herring , "open list:OPEN FIRMWARE AND..." , linux-arm-kernel@lists.infradead.org, linux-arm-msm , linux-kernel@vger.kernel.org, Lee Jones , Liam Girdwood , Mark Brown , Samuel Ortiz , Suman Anna , Jeffrey Hugo Content-Transfer-Encoding: 8BIT Message-Id: <8D91095C-63ED-4988-A4C8-68DADF95FF64@codeaurora.org> References: <1412037291-16880-1-git-send-email-bjorn.andersson@sonymobile.com> <1412037291-16880-2-git-send-email-bjorn.andersson@sonymobile.com> To: Bjorn Andersson X-Mailer: Apple Mail (2.1878.6) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sep 29, 2014, at 7:34 PM, Bjorn Andersson wrote: > Add device tree binding documentation for the Qualcom Shared Memory > manager. > > Signed-off-by: Bjorn Andersson > --- > > Exposed by this node is a set of items of different sizes. For many things a > standard of_xlate method of referencing the individual nodes would be > preferable, so a #something-cells would make sense. We do however also needs > access to these items without explicitly stating the references in devicetree > (e.g. SMD references 257 of these). I haven't found any good example of how to > implement this, so suggestions are welcome. > > Note that the hwspinlock reference is not yet supported in the mainline, but > this will likely need a few iterations so I wanted to get this out. > > .../devicetree/bindings/soc/qcom/qcom,smem.txt | 34 ++++++++++++++++++++ > 1 file changed, 34 insertions(+) > create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt > > diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt > new file mode 100644 > index 0000000..ddd58c7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt > @@ -0,0 +1,34 @@ > +Qualcomm Shared Memory binding > + > +This binding describes the Qualcomm Shared Memory, used to share data between > +various subsystems and OSes in Qualcomm platforms. > + > +- compatible: > + Usage: required > + Value type: > + Definition: must be: > + "qcom,smem" > + > +- reg: > + Usage: required > + Value type: > + Definition: base address and size pair for each area representing the > + shared memory. The first pair will must represent the "main" > + area, where the shared memory header and table-of-content > + can be found. > + > +- hwspinlocks: > + Usage: required > + Value type: > + Definition: reference to a hwspinlock used to protect allocations from > + the shared memory > + > += EXAMPLE > + > + smem: smem@fa00000 { > + compatible = "qcom,smem"; > + reg = <0x0fa00000 0x200000>, > + <0xfc428000 0x4000>; > + > + hwspinlocks = <&tcsr_mutex 3>; > + }; > -- > 1.7.9.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation