A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 03:01:39 -04:00
Code Issues Projects Releases Packages Wiki Activity

dt-bindings: mailbox: Add Amlogic Meson MHU Bindings

Browse source 
Signed-off-by: Neil Armstrong <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
This commit is contained in:
Neil Armstrong 2016-08-18 12:10:26 +02:00 • committed by Jassi Brar
commit a649244de7
1 changed files with 34 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

34
Documentation/devicetree/bindings/mailbox/meson-mhu.txt Normal file
View file

@ -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>;
};