On Wed, Dec 12, 2018 at 09:31:28PM +0200, Timo Alho wrote:
> The BPMP is a specific processor in Tegra210 chip, which is designed
> for boot process handling, assisting in entering deep low power states
> (suspend to ram), and offloading DRAM memory clock scaling on some
> platforms.
>
> Signed-off-by: Timo Alho <talho@xxxxxxxxxx>
> ---
> .../bindings/firmware/nvidia,tegra210-bpmp.txt | 36 ++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/firmware/nvidia,tegra210-bpmp.txt
>
> diff --git a/Documentation/devicetree/bindings/firmware/nvidia,tegra210-bpmp.txt b/Documentation/devicetree/bindings/firmware/nvidia,tegra210-bpmp.txt
> new file mode 100644
> index 0000000..de1fb62
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/firmware/nvidia,tegra210-bpmp.txt
> @@ -0,0 +1,36 @@
> +NVIDIA Tegra210 Boot and Power Management Processor (BPMP)
> +
> +The Boot and Power Management Processor (BPMP) is a co-processor found
> +in Tegra210 SoC. It is designed to handle the early stages of the boot
> +process as well as to assisting in entering deep low power state
> +(suspend to ram), and also offloading DRAM memory clock scaling on
> +some platforms. The binding document defines the resources that would
> +be used by the BPMP T210 firmware driver, which can create the
> +interprocessor communication (IPC) between the CPU and BPMP.
> +
> +Required properties:
> +- name : Should be bpmp
> +- compatible
> + Array of strings
> + One of:
> + - "nvidia,tegra210-bpmp"
> +- reg: physicall base address and length for HW synchornization primitives
s/physicall/physical/
> + 1) base address and length to Tegra 'atomics' hardware
> + 2) base address and length to Tegra 'semaphore' hardware
> +- interrupts: specifies the interrupt number for receiving messages ("rx")
> + and for triggering messages ("tx")
> +
> +Optional properties:
> +- #clock-cells : Should be 1 for platforms where DRAM clock control is
> + offloaded to bpmp.
> +
> +Example:
> +
> +bpmp {
bpmp@70016000
> + compatible = "nvidia,tegra210-bpmp";
> + reg = <0x0 0x70016000 0x0 0x2000
> + 0x0 0x60001000 0x0 0x1000>;
> + interrupts = <0 6 IRQ_TYPE_NONE>,
> + <0 4 IRQ_TYPE_EDGE_RISING>;
> + interrupt-names = "tx", "rx";
> +};
> --
> 2.7.4
>
