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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-04-25 11:22:32 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-04-28 09:08:46 +0200 |
commit | 00ce25c6dcdae5582ae4be37147ab33678adc995 (patch) | |
tree | 41c93102ae304a61738c31353e3cb5336ef0b297 /dts/Bindings/misc/atmel-ssc.txt | |
parent | 0af79fbb6779921d3f1962773adb7fb57d3c89d4 (diff) | |
download | barebox-00ce25c6dcdae5582ae4be37147ab33678adc995.tar.gz barebox-00ce25c6dcdae5582ae4be37147ab33678adc995.tar.xz |
Add devicetree source files as of Linux-3.15-rc2
This adds the Linux dts files to barebox. The dts files are
generated from Ian Campbells device-tree-rebasing.git:
git://xenbits.xen.org/people/ianc/device-tree-rebasing.git
The dts are found in dts/ in the barebox repository and
will be updated from upstream regularly, probably for each upstream
-rc.
To keep the synchronization with upstream easy no changes to
the original files are allowed under dts/. Instead changes to
upstream dts files will be done using overlays in arch/$ARCH/dts/.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/misc/atmel-ssc.txt')
-rw-r--r-- | dts/Bindings/misc/atmel-ssc.txt | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/dts/Bindings/misc/atmel-ssc.txt b/dts/Bindings/misc/atmel-ssc.txt new file mode 100644 index 0000000000..efc98ea1f2 --- /dev/null +++ b/dts/Bindings/misc/atmel-ssc.txt @@ -0,0 +1,49 @@ +* Atmel SSC driver. + +Required properties: +- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc" + - atmel,at91rm9200-ssc: support pdc transfer + - atmel,at91sam9g45-ssc: support dma transfer +- reg: Should contain SSC registers location and length +- interrupts: Should contain SSC interrupt +- clock-names: tuple listing input clock names. + Required elements: "pclk" +- clocks: phandles to input clocks. + + +Required properties for devices compatible with "atmel,at91sam9g45-ssc": +- dmas: DMA specifier, consisting of a phandle to DMA controller node, + the memory interface and SSC DMA channel ID (for tx and rx). + See Documentation/devicetree/bindings/dma/atmel-dma.txt for details. +- dma-names: Must be "tx", "rx". + +Optional properties: + - atmel,clk-from-rk-pin: bool property. + - When SSC works in slave mode, according to the hardware design, the + clock can get from TK pin, and also can get from RK pin. So, add + this parameter to choose where the clock from. + - By default the clock is from TK pin, if the clock from RK pin, this + property is needed. + +Examples: +- PDC transfer: +ssc0: ssc@fffbc000 { + compatible = "atmel,at91rm9200-ssc"; + reg = <0xfffbc000 0x4000>; + interrupts = <14 4 5>; + clocks = <&ssc0_clk>; + clock-names = "pclk"; +}; + +- DMA transfer: +ssc0: ssc@f0010000 { + compatible = "atmel,at91sam9g45-ssc"; + reg = <0xf0010000 0x4000>; + interrupts = <28 4 5>; + dmas = <&dma0 1 13>, + <&dma0 1 14>; + dma-names = "tx", "rx"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; + status = "disabled"; +}; |