[PATCH v3 1/4] dt-bindings: iio: at91-sama5d2_adc: add optional dma property
From: Eugen Hristev <hidden>
Date: 2017-11-15 13:10:01
Also in:
linux-devicetree, linux-iio, lkml
Subsystem:
iio subsystem and drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Jonathan Cameron, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Added property for DMA configuration of the device. Signed-off-by: Eugen Hristev <redacted> --- Changes in v3: None, but we discussed on the ML about whether we should have "dma-names" present in the binding even if it's only one. The helpers in the kernel to retrieve the channel info rely on the presence of this property, so I am resending the patch based on this. If another solution is better, please advise and I can try it and resend the patch. Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
index 552e7a8..6469a4c 100644
--- a/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt@@ -17,6 +17,11 @@ Required properties: This property uses the IRQ edge types values: IRQ_TYPE_EDGE_RISING , IRQ_TYPE_EDGE_FALLING or IRQ_TYPE_EDGE_BOTH +Optional properties: + - dmas: Phandle to dma channel for the ADC. + - dma-names: Must be "rx" when dmas property is being used. + See ../../dma/dma.txt for details. + Example: adc: adc at fc030000 {
@@ -31,4 +36,6 @@ adc: adc at fc030000 { vddana-supply = <&vdd_3v3_lp_reg>; vref-supply = <&vdd_3v3_lp_reg>; atmel,trigger-edge-type = <IRQ_TYPE_EDGE_BOTH>; + dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | AT91_XDMAC_DT_PERID(25))>; + dma-names = "rx"; }
--
2.7.4