1 The APM X-Gene SLIMpro mailbox is used to comm 1 The APM X-Gene SLIMpro mailbox is used to communicate messages between
2 the ARM64 processors and the Cortex M3 (dubbed 2 the ARM64 processors and the Cortex M3 (dubbed SLIMpro). It uses a simple
3 interrupt based door bell mechanism and can ex 3 interrupt based door bell mechanism and can exchange simple messages using the
4 internal registers. 4 internal registers.
5 5
6 There are total of 8 interrupts in this mailbo 6 There are total of 8 interrupts in this mailbox. Each used for an individual
7 door bell (or mailbox channel). 7 door bell (or mailbox channel).
8 8
9 Required properties: 9 Required properties:
10 - compatible: Should be as "apm,xgene-slimpr 10 - compatible: Should be as "apm,xgene-slimpro-mbox".
11 11
12 - reg: Contains the mailbox register 12 - reg: Contains the mailbox register address range.
13 13
14 - interrupts: 8 interrupts must be from 0 to 14 - interrupts: 8 interrupts must be from 0 to 7, interrupt 0 define the
15 the interrupt for mailbox chan 15 the interrupt for mailbox channel 0 and interrupt 1 for
16 mailbox channel 1 and so likew 16 mailbox channel 1 and so likewise for the reminder.
17 17
18 - #mbox-cells: only one to specify the mailbo 18 - #mbox-cells: only one to specify the mailbox channel number.
19 19
20 Example: 20 Example:
21 21
22 Mailbox Node: 22 Mailbox Node:
23 mailbox: mailbox@10540000 { 23 mailbox: mailbox@10540000 {
24 compatible = "apm,xgen 24 compatible = "apm,xgene-slimpro-mbox";
25 reg = <0x0 0x10540000 25 reg = <0x0 0x10540000 0x0 0xa000>;
26 #mbox-cells = <1>; 26 #mbox-cells = <1>;
27 interrupts = <0x0 0 27 interrupts = <0x0 0x0 0x4>,
28 <0x0 0 28 <0x0 0x1 0x4>,
29 <0x0 0 29 <0x0 0x2 0x4>,
30 <0x0 0 30 <0x0 0x3 0x4>,
31 <0x0 0 31 <0x0 0x4 0x4>,
32 <0x0 0 32 <0x0 0x5 0x4>,
33 <0x0 0 33 <0x0 0x6 0x4>,
34 <0x0 0 34 <0x0 0x7 0x4>,
35 }; 35 };
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