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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-06 17:36:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-06 17:36:53 -0700 |
| commit | c6594fc6af1924b7fdce600088b10e3b3b159fb7 (patch) | |
| tree | 9abf18bf70373623310aa6ea8e671d571e6236c1 /Documentation | |
| parent | 553911c67eb701d46e2dcd073f603c6f6546c38b (diff) | |
| parent | a649244de727b87d38fe46d86ef98c8d1fc49551 (diff) | |
Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration
Pull mailbox updates from Jussi Brar:
"New driver and DT bindings for MHU controller integrated on Amlogic
Meson platform"
* 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
dt-bindings: mailbox: Add Amlogic Meson MHU Bindings
mailbox: Add Platform Message-Handling-Unit variant driver
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/mailbox/meson-mhu.txt | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mailbox/meson-mhu.txt b/Documentation/devicetree/bindings/mailbox/meson-mhu.txt new file mode 100644 index 000000000000..a530310772b9 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/meson-mhu.txt @@ -0,0 +1,34 @@ +Amlogic Meson MHU Mailbox Driver +================================ + +The Amlogic's Meson SoCs Message-Handling-Unit (MHU) is a mailbox controller +that has 3 independent channels/links to communicate with remote processor(s). +MHU links are hardwired on a platform. A link raises interrupt for any +received data. However, there is no specified way of knowing if the sent +data has been read by the remote. This driver assumes the sender polls +STAT register and the remote clears it after having read the data. + +Mailbox Device Node: +==================== + +Required properties: +-------------------- +- compatible: Shall be "amlogic,meson-gxbb-mhu" +- reg: Contains the mailbox register address range (base + address and length) +- #mbox-cells Shall be 1 - the index of the channel needed. +- interrupts: Contains the interrupt information corresponding to + each of the 2 links of MHU. + +Example: +-------- + + mailbox: mailbox@c883c404 { + #mbox-cells = <1>; + compatible = "amlogic,meson-gxbb-mhu"; + reg = <0 0xc883c404 0 0x4c>; + interrupts = <0 208 IRQ_TYPE_EDGE_RISING>, + <0 209 IRQ_TYPE_EDGE_RISING>, + <0 210 IRQ_TYPE_EDGE_RISING>; + #mbox-cells = <1>; + }; |