[PATCH 3/4] dt-bindings: spi: Add the DMA properties for the SPI dma mode

Baolin Wang
2019-01-15T13:47:44Z

From: Lanqing Liu <lanqing.liu@spreadtrum.com>

Add the DMA properties for the SPI dma mode.

Signed-off-by: Lanqing Liu <lanqing.liu@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
Documentation/devicetree/bindings/spi/spi-sprd.txt | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/spi-sprd.txt b/Documentation/devicetree/bindings/spi/spi-sprd.txt
index bad211a..01ef53f 100644
--- a/Documentation/devicetree/bindings/spi/spi-sprd.txt
+++ b/Documentation/devicetree/bindings/spi/spi-sprd.txt
@@ -14,6 +14,12 @@ Required properties:
address on the SPI bus. Should be set to 1.
- #size-cells: Should be set to 0.

+Optional properties:
+dma-names: Should contain names of the SPI used DMA channel.
+dmas: Should contain DMA channels which the SPI used sorted in the
+ same order as the dma-names property.
+sprd,dma-slave-ids: Should contain the DMA number that the SPI hardware required.
+
Example:
spi0: spi@70a00000{
compatible = "sprd,sc9860-spi";
@@ -21,6 +27,9 @@ spi0: spi@70a00000{
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
clock-names = "spi", "source","enable";
clocks = <&clk_spi0>, <&ext_26m>, <&clk_ap_apb_gates 5>;
+ dma-names = "rx_chn", "tx_chn";
+ dmas = <&apdma 11>, <&apdma 12>;
+ sprd,dma-slave-ids = <11 12>;
#address-cells = <1>;
#size-cells = <0>;
};
--
1.7.9.5