target/linux/ipq806x/patches-3.18/034-soc-qcom-Add-device-tree-binding-for-SMEM.patch

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   4 Subject: [v2,1/2] soc: qcom: Add device tree binding for SMEM
   5 From: Bjorn Andersson <bjorn.andersson@sonymobile.com>
   6 X-Patchwork-Id: 6202201
   7 Message-Id: <1428795178-24312-1-git-send-email-bjorn.andersson@sonymobile.com>
   8 To: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
   9         Mark Rutland <mark.rutland@arm.com>,
  10         Ian Campbell <ijc+devicetree@hellion.org.uk>,
  11         Kumar Gala <galak@codeaurora.org>, Jeffrey Hugo <jhugo@codeaurora.org>,
  12         Andry Gross <agross@codeaurora.org>
  13 Cc: <devicetree@vger.kernel.org>,
  14         linux-arm-msm <linux-arm-msm@vger.kernel.org>,
  15         <linux-kernel@vger.kernel.org>
  16 Date: Sat, 11 Apr 2015 16:32:57 -0700
  17
  18 Add device tree binding documentation for the Qualcom Shared Memory
  19 manager.
  20
  21 Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
  22
  23 ---
  24 Changes since v1:
  25 - None
  26
  27  .../devicetree/bindings/soc/qcom/qcom,smem.txt     | 49 ++++++++++++++++++++++
  28  1 file changed, 49 insertions(+)
  29  create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt
  30
  31 --- /dev/null
  32 +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,smem.txt
  33 @@ -0,0 +1,49 @@
  34 +Qualcomm Shared Memory binding
  35 +
  36 +This binding describes the Qualcomm Shared Memory, used to share data between
  37 +various subsystems and OSes in Qualcomm platforms.
  38 +
  39 +- compatible:
  40 +       Usage: required
  41 +       Value type: <stringlist>
  42 +       Definition: must be:
  43 +                   "qcom,smem"
  44 +
  45 +- memory-region:
  46 +       Usage: required
  47 +       Value type: <prop-encoded-array>
  48 +       Definition: handle to memory reservation for main smem memory region.
  49 +
  50 +- reg:
  51 +       Usage: optional
  52 +       Value type: <prop-encoded-array>
  53 +       Definition: base address and size pair for any additional memory areas
  54 +                   of the shared memory.
  55 +
  56 +- hwspinlocks:
  57 +       Usage: required
  58 +       Value type: <prop-encoded-array>
  59 +       Definition: reference to a hwspinlock used to protect allocations from
  60 +                   the shared memory
  61 +
  62 += EXAMPLE
  63 +
  64 +       reserved-memory {
  65 +               #address-cells = <1>;
  66 +               #size-cells = <1>;
  67 +               ranges;
  68 +
  69 +               smem_region: smem@fa00000 {
  70 +                       reg = <0xfa00000 0x200000>;
  71 +                       no-map;
  72 +               };
  73 +       };
  74 +
  75 +       smem@fa00000 {
  76 +               compatible = "qcom,smem";
  77 +
  78 +               memory-region = <&smem_region>;
  79 +               reg = <0xfc428000 0x4000>;
  80 +
  81 +               hwlocks = <&tcsr_mutex 3>;
  82 +       };