Messages in this thread | | | Date | Mon, 25 Aug 2014 13:06:58 -0600 | From | Stephen Warren <> | Subject | Re: [PATCH v2 1/9] of: Add NVIDIA Tegra XUSB mailbox binding |
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On 08/25/2014 12:48 PM, Stephen Warren wrote: > On 08/18/2014 11:08 AM, Andrew Bresticker wrote: >> Add device-tree bindings for the Tegra XUSB mailbox which will be used >> for communication between the Tegra xHCI controller's firmware and the >> host processor. > >> diff --git >> a/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt >> b/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt > >> +NVIDIA Tegra XUSB mailbox >> +========================= >> + >> +The Tegra XUSB mailbox is used by the Tegra xHCI controller's >> firmware to >> +communicate requests to the host and PHY drivers. >> + >> +Required properties: >> +-------------------- >> + - compatible: Should be "nvidia,tegra124-xusb-mbox". >> + - reg: Address and length of the XUSB FPCI registers. >> + - interrupts: XUSB mailbox interrupt. >> + - #mbox-cells: Should be 1. The specifier is the index of the >> mailbox to >> + reference. See <dt-bindings/mailbox/tegra-xusb-mailbox.h> for the >> list >> + of valid values. > > Is there a common mailbox binding somewhere? I couldn't find one. While > the text above specifies the value for #mbox-cells, it doesn't specify > the details of what the property is used for (i.e. there's no > documentation of the consumer-side of this property, for parsing the > mboxes property). Typically, that would be part of a subsystem's common > binding document, and that document would be referenced here.
Ah, I see it's still being developed. I found it at: http://lkml.iu.edu/hypermail/linux/kernel/1408.0/00201.html
It would be good to mention that the semantics of this property are defined by ../mailbox/mailbox.txt.
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