target/linux/bcm53xx/patches-4.4/033-dt-bindings-add-SMP-enable-method-for-Broadcom-NSP.patch

   1 From fa20071c74be69a1d84df85e5d1e72a40a156b89 Mon Sep 17 00:00:00 2001
   2 From: Kapil Hali <kapilh@broadcom.com>
   3 Date: Tue, 1 Dec 2015 11:24:05 -0500
   4 Subject: [PATCH] dt-bindings: add SMP enable-method for Broadcom NSP
   5
   6 Add a compatible string "brcm,bcm-nsp-smp" for Broadcom's
   7 Northstar Plus CPU to the 32-bit ARM CPU device tree binding
   8 documentation file and create a new binding documentation for
   9 Northstar Plus CPU.
  10
  11 Signed-off-by: Kapil Hali <kapilh@broadcom.com>
  12 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  13 ---
  14  .../bindings/arm/bcm/brcm,nsp-cpu-method.txt       | 39 ++++++++++++++++++++++
  15  Documentation/devicetree/bindings/arm/cpus.txt     |  1 +
  16  2 files changed, 40 insertions(+)
  17  create mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
  18
  19 --- /dev/null
  20 +++ b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
  21 @@ -0,0 +1,39 @@
  22 +Broadcom Northstar Plus SoC CPU Enable Method
  23 +---------------------------------------------
  24 +This binding defines the enable method used for starting secondary
  25 +CPUs in the following Broadcom SoCs:
  26 +  BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312
  27 +
  28 +The enable method is specified by defining the following required
  29 +properties in the "cpus" device tree node:
  30 +  - enable-method = "brcm,bcm-nsp-smp";
  31 +  - secondary-boot-reg = <...>;
  32 +
  33 +The secondary-boot-reg property is a u32 value that specifies the
  34 +physical address of the register which should hold the common
  35 +entry point for a secondary CPU. This entry is cpu node specific
  36 +and should be added per cpu. E.g., in case of NSP (BCM58625) which
  37 +is a dual core CPU SoC, this entry should be added to cpu1 node.
  38 +
  39 +
  40 +Example:
  41 +       cpus {
  42 +               #address-cells = <1>;
  43 +               #size-cells = <0>;
  44 +               enable-method = "brcm,bcm-nsp-smp";
  45 +
  46 +               cpu0: cpu@0 {
  47 +                       device_type = "cpu";
  48 +                       compatible = "arm,cortex-a9";
  49 +                       next-level-cache = <&L2>;
  50 +                       reg = <0>;
  51 +               };
  52 +
  53 +               cpu1: cpu@1 {
  54 +                       device_type = "cpu";
  55 +                       compatible = "arm,cortex-a9";
  56 +                       next-level-cache = <&L2>;
  57 +                       reg = <1>;
  58 +                       secondary-boot-reg = <0xffff042c>;
  59 +               };
  60 +       };
  61 --- a/Documentation/devicetree/bindings/arm/cpus.txt
  62 +++ b/Documentation/devicetree/bindings/arm/cpus.txt
  63 @@ -190,6 +190,7 @@ nodes to be present and contain the prop
  64                             "allwinner,sun6i-a31"
  65                             "allwinner,sun8i-a23"
  66                             "arm,psci"
  67 +                           "brcm,bcm-nsp-smp"
  68                             "brcm,brahma-b15"
  69                             "marvell,armada-375-smp"
  70                             "marvell,armada-380-smp"