| Broadcom BCM63138 DSL System-on-a-Chip device tree bindings |
| ----------------------------------------------------------- |
| |
| Boards compatible with the BCM63138 DSL System-on-a-Chip should have the |
| following properties: |
| |
| Required root node property: |
| |
| compatible: should be "brcm,bcm63138" |
| |
| An optional Boot lookup table Device Tree node is required for secondary CPU |
| initialization as well as a 'resets' phandle to the correct PMB controller as |
| defined in reset/brcm,bcm63138-pmb.txt for this secondary CPU, and an |
| 'enable-method' property. |
| |
| Required properties for the Boot lookup table node: |
| - compatible: should be "brcm,bcm63138-bootlut" |
| - reg: register base address and length for the Boot Lookup table |
| |
| Optional properties for the primary CPU node: |
| - enable-method: should be "brcm,bcm63138" |
| |
| Optional properties for the secondary CPU node: |
| - enable-method: should be "brcm,bcm63138" |
| - resets: phandle to the relevant PMB controller, one integer indicating the internal |
| bus number, and a second integer indicating the address of the CPU in the PMB |
| internal bus number. |
| |
| Example: |
| |
| cpus { |
| cpu@0 { |
| compatible = "arm,cotex-a9"; |
| reg = <0>; |
| ... |
| enable-method = "brcm,bcm63138"; |
| }; |
| |
| cpu@1 { |
| compatible = "arm,cortex-a9"; |
| reg = <1>; |
| ... |
| enable-method = "brcm,bcm63138"; |
| resets = <&pmb0 4 1>; |
| }; |
| }; |
| |
| bootlut: bootlut@8000 { |
| compatible = "brcm,bcm63138-bootlut"; |
| reg = <0x8000 0x50>; |
| }; |
| |
| ======= |
| reboot |
| ------ |
| Two nodes are required for software reboot: a timer node and a syscon-reboot node. |
| |
| Timer node: |
| |
| - compatible: Must be "brcm,bcm6328-timer", "syscon" |
| - reg: Register base address and length |
| |
| Syscon reboot node: |
| |
| See Documentation/devicetree/bindings/power/reset/syscon-reboot.txt for the |
| detailed list of properties, the two values defined below are specific to the |
| BCM6328-style timer: |
| |
| - offset: Should be 0x34 to denote the offset of the TIMER_WD_TIMER_RESET register |
| from the beginning of the TIMER block |
| - mask: Should be 1 for the SoftRst bit. |
| |
| Example: |
| |
| timer: timer@80 { |
| compatible = "brcm,bcm6328-timer", "syscon"; |
| reg = <0x80 0x3c>; |
| }; |
| |
| reboot { |
| compatible = "syscon-reboot"; |
| regmap = <&timer>; |
| offset = <0x34>; |
| mask = <0x1>; |
| }; |