ARM: at91/tc: add device tree support to atmel_tclib

Device tree support added to atmel_tclib: the generic Timer Counter
library. This is used by the clocksource/clockevent driver tcb_clksrc.

The current DT enabled platforms are also modified to use it:
- .dtsi files are modified to add Timer Counter Block entries
- alias are created to allow identification of each block
- clkdev lookup tables are added for clocks identification.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 24 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index 380f711a2021..1aeaf6f2a1ba 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -6,3 +6,27 @@ PIT Timer required properties:
 - reg: Should contain registers location and length
 - interrupts: Should contain interrupt for the PIT which is the IRQ line
   shared across all System Controller members.
+
+TC/TCLIB Timer required properties:
+- compatible: Should be "atmel,<chip>-pit".
+  <chip> can be "at91rm9200" or "at91sam9x5"
+- reg: Should contain registers location and length
+- interrupts: Should contain all interrupts for the TC block
+  Note that you can specify several interrupt cells if the TC
+  block has one interrupt per channel.
+
+Examples:
+
+One interrupt per TC block:
+        tcb0: timer@fff7c000 {
+                compatible = "atmel,at91rm9200-tcb";
+                reg = <0xfff7c000 0x100>;
+                interrupts = <18 4>;
+        };
+
+One interrupt per TC channel in a TC block:
+        tcb1: timer@fffdc000 {
+                compatible = "atmel,at91rm9200-tcb";
+                reg = <0xfffdc000 0x100>;
+                interrupts = <26 4 27 4 28 4>;
+        };