From c8336975381d481829e3e6a81c38cd118826ca03 Mon Sep 17 00:00:00 2001 From: Mugunthan V N Date: Sat, 16 Jan 2016 21:33:58 +0530 Subject: dm: timer: uclass: add timer init in uclass driver to add timer device Adding timer init function in timer-uclass driver to create and initialize the timer device on platforms where u-boot,dm-pre-reloc is not used. Since there will be multiple timer devices in the system, adding a tick-timer node in chosen node to know which timer device to be used as tick timer in u-boot. Signed-off-by: Mugunthan V N --- doc/device-tree-bindings/chosen.txt | 43 +++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 doc/device-tree-bindings/chosen.txt (limited to 'doc') diff --git a/doc/device-tree-bindings/chosen.txt b/doc/device-tree-bindings/chosen.txt new file mode 100644 index 0000000000..bf9a30a8f9 --- /dev/null +++ b/doc/device-tree-bindings/chosen.txt @@ -0,0 +1,43 @@ +The chosen node +--------------- +The chosen node does not represent a real device, but serves as a place +for passing data like which serial device to used to print the logs etc + + +stdout-path property +-------------------- +Device trees may specify the device to be used for boot console output +with a stdout-path property under /chosen. + +Example +------- +/ { + chosen { + stdout-path = "/serial@f00:115200"; + }; + + serial@f00 { + compatible = "vendor,some-uart"; + reg = <0xf00 0x10>; + }; +}; + +tick-timer property +------------------- +In a system there are multiple timers, specify which timer to be used +as the tick-timer. Earlier it was hardcoded in the timer driver now +since device tree has all the timer nodes. Specify which timer to be +used as tick timer. + +Example +------- +/ { + chosen { + tick-timer = "/timer2@f00"; + }; + + timer2@f00 { + compatible = "vendor,some-timer"; + reg = <0xf00 0x10>; + }; +}; -- cgit v1.2.3