Hi,
* Dave Gerlach <d-gerlach@xxxxxx> [150401 12:38]:
> Add the device tree bindings document for the TI Wakeup M3 remote
> processor devices on AM33xx and AM43xx SoCs. These devices are used
> to offload low-level power management functionality, and are handled
> by the wkup_m3 remoteproc driver.
>
> Signed-off-by: Suman Anna <s-anna@xxxxxx>
> Signed-off-by: Dave Gerlach <d-gerlach@xxxxxx>
This binding looks OK to me now, thanks for updating it:
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
> ---
> .../bindings/remoteproc/wkup_m3_rproc.txt | 52 ++++++++++++++++++++++
> 1 file changed, 52 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt
>
> diff --git a/Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt b/Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt
> new file mode 100644
> index 0000000..3a70073
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/wkup_m3_rproc.txt
> @@ -0,0 +1,52 @@
> +TI Wakeup M3 Remoteproc Driver
> +==============================
> +
> +The TI AM33xx and AM43xx family of devices use a small Cortex M3 co-processor
> +(commonly referred to as Wakeup M3 or CM3) to help with various low power tasks
> +that cannot be controlled from the MPU. This CM3 processor requires a firmware
> +binary to accomplish this. The wkup_m3 remoteproc driver handles the loading of
> +the firmware and booting of the CM3.
> +
> +Wkup M3 Device Node:
> +====================
> +A wkup_m3 device node is used to represent the Wakeup M3 processor instance
> +within the SoC. It is added as a child node of the parent interconnect bus
> +(l4_wkup) through which it is accessible to the MPU.
> +
> +Required properties:
> +--------------------
> +- compatible: Should be one of,
> + "ti,am3352-wkup-m3" for AM33xx SoCs
> + "ti,am4372-wkup-m3" for AM43xx SoCs
> +- reg: Should contain the address ranges for the two internal
> + memory regions, UMEM and DMEM. The parent node should
> + provide an appropriate ranges property for properly
> + translating these into bus addresses.
> +- reg-names: Contains the corresponding names for the two memory
> + regions. These should be named "umem" & "dmem".
> +- ti,hwmods: Name of the hwmod associated with the wkupm3 device.
> +- ti,pm-firmware: Name of firmware file to be used for loading and
> + booting the wkup_m3 remote processor.
> +
> +Example:
> +--------
> +/* AM33xx */
> +ocp {
> + l4_wkup: l4_wkup@44c00000 {
> + compatible = "am335-l4-wkup", "simple-bus";
> + ranges = <0 0x44c00000 0x400000>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + wkup_m3: wkup_m3@100000 {
> + compatible = "ti,am3352-wkup-m3";
> + reg = <0x100000 0x4000>,
> + <0x180000 0x2000>;
> + reg-names = "umem", "dmem";
> + ti,hwmods = "wkup_m3";
> + ti,pm-firmware = "am335x-pm-firmware.elf";
> + };
> + };
> +
> + ...
> +};
> --
> 2.3.0
>
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