1 Spreadtrum SPI Controller 1 Spreadtrum SPI Controller
2 2
3 Required properties: 3 Required properties:
4 - compatible: Should be "sprd,sc9860-spi". 4 - compatible: Should be "sprd,sc9860-spi".
5 - reg: Offset and length of SPI controller reg 5 - reg: Offset and length of SPI controller register space.
6 - interrupts: Should contain SPI interrupt. 6 - interrupts: Should contain SPI interrupt.
7 - clock-names: Should contain following entrie 7 - clock-names: Should contain following entries:
8 "spi" for SPI clock, 8 "spi" for SPI clock,
9 "source" for SPI source (parent) clock 9 "source" for SPI source (parent) clock,
10 "enable" for SPI module enable clock. 10 "enable" for SPI module enable clock.
11 - clocks: List of clock input name strings sor 11 - clocks: List of clock input name strings sorted in the same order
12 as the clock-names property. 12 as the clock-names property.
13 - #address-cells: The number of cells required 13 - #address-cells: The number of cells required to define a chip select
14 address on the SPI bus. Should be set 14 address on the SPI bus. Should be set to 1.
15 - #size-cells: Should be set to 0. 15 - #size-cells: Should be set to 0.
16 16
17 Optional properties: 17 Optional properties:
18 dma-names: Should contain names of the SPI use 18 dma-names: Should contain names of the SPI used DMA channel.
19 dmas: Should contain DMA channels and DMA slav 19 dmas: Should contain DMA channels and DMA slave ids which the SPI used
20 sorted in the same order as the dma-na 20 sorted in the same order as the dma-names property.
21 21
22 Example: 22 Example:
23 spi0: spi@70a00000{ 23 spi0: spi@70a00000{
24 compatible = "sprd,sc9860-spi"; 24 compatible = "sprd,sc9860-spi";
25 reg = <0 0x70a00000 0 0x1000>; 25 reg = <0 0x70a00000 0 0x1000>;
26 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL 26 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
27 clock-names = "spi", "source","enable" 27 clock-names = "spi", "source","enable";
28 clocks = <&clk_spi0>, <&ext_26m>, <&cl 28 clocks = <&clk_spi0>, <&ext_26m>, <&clk_ap_apb_gates 5>;
29 dma-names = "rx_chn", "tx_chn"; 29 dma-names = "rx_chn", "tx_chn";
30 dmas = <&apdma 11 11>, <&apdma 12 12>; 30 dmas = <&apdma 11 11>, <&apdma 12 12>;
31 #address-cells = <1>; 31 #address-cells = <1>;
32 #size-cells = <0>; 32 #size-cells = <0>;
33 }; 33 };
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