From: Duc Dang Date: Sat, 13 Feb 2016 03:39:27 +0000 (-0800) Subject: Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9b2396dd1e41657c095d480802020c283ba1a43e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Documentation: mailbox: Add APM X-Gene SLIMpro mailbox dts documentation This adds the APM X-Gene SLIMpro mailbox device tree node documentation. Signed-off-by: Feng Kan Signed-off-by: Duc Dang Acked-by: Rob Herring Signed-off-by: Jassi Brar --- diff --git a/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt new file mode 100644 index 000000000000..e46451bb242f --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/xgene-slimpro-mailbox.txt @@ -0,0 +1,35 @@ +The APM X-Gene SLIMpro mailbox is used to communicate messages between +the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple +interrupt based door bell mechanism and can exchange simple messages using the +internal registers. + +There are total of 8 interrupts in this mailbox. Each used for an individual +door bell (or mailbox channel). + +Required properties: +- compatible: Should be as "apm,xgene-slimpro-mbox". + +- reg: Contains the mailbox register address range. + +- interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the + the interrupt for mailbox channel 0 and interrupt 1 for + mailbox channel 1 and so likewise for the reminder. + +- #mbox-cells: only one to specify the mailbox channel number. + +Example: + +Mailbox Node: + mailbox: mailbox@10540000 { + compatible = "apm,xgene-slimpro-mbox"; + reg = <0x0 0x10540000 0x0 0xa000>; + #mbox-cells = <1>; + interrupts = <0x0 0x0 0x4>, + <0x0 0x1 0x4>, + <0x0 0x2 0x4>, + <0x0 0x3 0x4>, + <0x0 0x4 0x4>, + <0x0 0x5 0x4>, + <0x0 0x6 0x4>, + <0x0 0x7 0x4>, + };