On 07/18/2013 11:43 AM, Sricharan R wrote:
This adds the irq/dma crossbar device nodes.
There is a IRQ and DMA crossbar device in the soc, which
maps the irq/dma requests from the peripherals to the
mpu/dsp/ipu/eve interrupt and sdma/edma controller's inputs.
The Peripheral irq/dma requests are connected to only one crossbar
input and the output of the crossbar is connected to only one
controller's input line. On POR, there are some mappings which
are done by default. Those peripherals which do not have a
mapping on POR, should be configured to route its requests
using the crossbar control registers.
What is POR? Plan on Record? I supppose, we just love our TLA?
The irq/dma mapping for some peripherals are
added with the crossbar nodes here.
Signed-off-by: Sricharan R <r.sricharan@xxxxxx>
---
arch/arm/boot/dts/dra7.dtsi | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index a5d9350..e6208b4 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -85,6 +85,25 @@
ranges;
ti,hwmods = "l3_main_1", "l3_main_2";
+ crossbar_mpu: mpuirq@4a002a48 {
+ compatible = "crossbar";
+ crossbar-name = "mpu-irq";
+ reg = <0x4a002a48 0x0130>;
+ reg-width = <16>;
+ crossbar-lines = "mpu-irq", "rtc-ss-alarm", <0x9f 0xd9 0x12c>,
+ "mpu-irq", "mcasp3-arevt", <0x9e 0x96 0x12a>,
+ "mpu-irq", "mcasp3-axevt", <0x9d 0x97 0x128>;
a) I'd like to use UART10. oh, let me guess: we dont map all cross bar
options here.. just "certain ones"
b) I like to use random 6 uarts out of the available 10 uarts on the fly.
c) I'd like to use IRQCROSS bar such that i use all the hardware block
instances that dont have default GIC IRQ mapping.
+ };
+
+ crossbar_dma: dmareq@4a002b78 {
+ compatible = "crossbar";
+ crossbar-name = "dma-req";
+ reg = <0x4a002b78 0x0100>;
+ reg-width = <16>;
+ crossbar-lines = "dma-req", "mcasp3-rx", <0x7e 0x84 0xfc>,
+ "dma-req", "mcasp3-tx", <0x7d 0x85 0xfa>;
+ };
+
counter32k: counter@4ae04000 {
compatible = "ti,omap-counter32k";
reg = <0x4ae04000 0x40>;
--
Regards,
Nishanth Menon
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