From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Andersson Subject: [RFC 1/7] soc: qcom: Add device tree binding for SMEM Date: Mon, 29 Sep 2014 17:34:45 -0700 Message-ID: <1412037291-16880-2-git-send-email-bjorn.andersson@sonymobile.com> References: <1412037291-16880-1-git-send-email-bjorn.andersson@sonymobile.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1412037291-16880-1-git-send-email-bjorn.andersson@sonymobile.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Kumar Gala , Andy Gross , Arnd Bergmann , Grant Likely , Ian Campbell , Mark Rutland , Pawel Moll , Rob Herring Cc: devicetree@vger.kernel.org, Samuel Ortiz , linux-arm-msm@vger.kernel.org, Liam Girdwood , linux-kernel@vger.kernel.org, Mark Brown , Lee Jones , linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org 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