Update the binding documentation and the examples to support
bi-directional DMA channels.
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
---
.../devicetree/bindings/mmc/ingenic,mmc.yaml | 37 ++++++++++++++++---
1 file changed, 31 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/mmc/ingenic,mmc.yaml b/Documentation/devicetree/bindings/mmc/ingenic,mmc.yaml
index 01d5c6da0eeb..2d10aedf2e00 100644
--- a/Documentation/devicetree/bindings/mmc/ingenic,mmc.yaml
+++ b/Documentation/devicetree/bindings/mmc/ingenic,mmc.yaml
@@ -39,14 +39,15 @@ properties:
const: mmc
dmas:
- items:
- - description: DMA controller phandle and request line for RX
- - description: DMA controller phandle and request line for TX
+ minItems: 1
+ maxItems: 2
dma-names:
- items:
- - const: rx
- - const: tx
+ oneOf:
+ - items:
+ - const: rx
+ - const: tx
+ - const: tx-rx
required:
- compatible
@@ -80,3 +81,27 @@ examples:
<&dma JZ4780_DMA_MSC0_TX 0xffffffff>;
dma-names = "rx", "tx";
};
+ - |
+ #include <dt-bindings/clock/ingenic,jz4780-cgu.h>
+ #include <dt-bindings/dma/jz4780-dma.h>
+ /*
+ * Alternative version of the example above,
+ * but using one single DMA channel for both
+ * TX and RX.
+ */
+ mmc1: mmc@13460000 {
+ compatible = "ingenic,jz4780-mmc";
+ reg = <0x13460000 0x1000>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <36>;
+
+ clocks = <&cgu JZ4780_CLK_MSC1>;
+ clock-names = "mmc";
+
+ cap-sd-highspeed;
+ cap-mmc-highspeed;
+ cap-sdio-irq;
+ dmas = <&dma JZ4780_DMA_MSC1_TX JZ4780_DMA_MSC1_RX 0xffffffff>;
+ dma-names = "tx-rx";
+ };
--
2.34.1
