From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- .../devicetree/bindings/mailbox/altera-mailbox.txt | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/altera-mailbox.txt (limited to 'Documentation/devicetree/bindings/mailbox/altera-mailbox.txt') diff --git a/Documentation/devicetree/bindings/mailbox/altera-mailbox.txt b/Documentation/devicetree/bindings/mailbox/altera-mailbox.txt new file mode 100644 index 000000000..c4dd93f1f --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/altera-mailbox.txt @@ -0,0 +1,48 @@ +Altera Mailbox Driver +===================== + +Required properties: +- compatible : "altr,mailbox-1.0". +- reg : physical base address of the mailbox and length of + memory mapped region. +- #mbox-cells: Common mailbox binding property to identify the number + of cells required for the mailbox specifier. Should be 1. + +Optional properties: +- interrupts : interrupt number. The interrupt specifier format + depends on the interrupt controller parent. + +Example: + mbox_tx: mailbox@100 { + compatible = "altr,mailbox-1.0"; + reg = <0x100 0x8>; + interrupt-parent = < &gic_0 >; + interrupts = <5>; + #mbox-cells = <1>; + }; + + mbox_rx: mailbox@200 { + compatible = "altr,mailbox-1.0"; + reg = <0x200 0x8>; + interrupt-parent = < &gic_0 >; + interrupts = <6>; + #mbox-cells = <1>; + }; + +Mailbox client +=============== +"mboxes" and the optional "mbox-names" (please see +Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value +of the mboxes property should contain a phandle to the mailbox controller +device node and second argument is the channel index. It must be 0 (hardware +support only one channel).The equivalent "mbox-names" property value can be +used to give a name to the communication channel to be used by the client user. + +Example: + mclient0: mclient0@400 { + compatible = "client-1.0"; + reg = <0x400 0x10>; + mbox-names = "mbox-tx", "mbox-rx"; + mboxes = <&mbox_tx 0>, + <&mbox_rx 0>; + }; -- cgit v1.2.3