1Binding for MTK SPI controller 2 3Required properties: 4- compatible: should be one of the following. 5 - mediatek,mt8173-spi: for mt8173 platforms 6 - mediatek,mt8135-spi: for mt8135 platforms 7 - mediatek,mt6589-spi: for mt6589 platforms 8 9- #address-cells: should be 1. 10 11- #size-cells: should be 0. 12 13- reg: Address and length of the register set for the device 14 15- interrupts: Should contain spi interrupt 16 17- clocks: phandles to input clocks. 18 The first should be one of the following. It's PLL. 19 - <&clk26m>: specify parent clock 26MHZ. 20 - <&topckgen CLK_TOP_SYSPLL3_D2>: specify parent clock 109MHZ. 21 It's the default one. 22 - <&topckgen CLK_TOP_SYSPLL4_D2>: specify parent clock 78MHZ. 23 - <&topckgen CLK_TOP_UNIVPLL2_D4>: specify parent clock 104MHZ. 24 - <&topckgen CLK_TOP_UNIVPLL1_D8>: specify parent clock 78MHZ. 25 The second should be <&topckgen CLK_TOP_SPI_SEL>. It's clock mux. 26 The third is <&pericfg CLK_PERI_SPI0>. It's clock gate. 27 28- clock-names: shall be "parent-clk" for the parent clock, "sel-clk" for the 29 muxes clock, and "spi-clk" for the clock gate. 30 31Optional properties: 32-cs-gpios: see spi-bus.txt, only required for MT8173. 33 34- mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi 35 controller used. This is a array, the element value should be 0~3, 36 only required for MT8173. 37 0: specify GPIO69,70,71,72 for spi pins. 38 1: specify GPIO102,103,104,105 for spi pins. 39 2: specify GPIO128,129,130,131 for spi pins. 40 3: specify GPIO5,6,7,8 for spi pins. 41 42Example: 43 44- SoC Specific Portion: 45spi: spi@1100a000 { 46 compatible = "mediatek,mt8173-spi"; 47 #address-cells = <1>; 48 #size-cells = <0>; 49 reg = <0 0x1100a000 0 0x1000>; 50 interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_LOW>; 51 clocks = <&topckgen CLK_TOP_SYSPLL3_D2>, 52 <&topckgen CLK_TOP_SPI_SEL>, 53 <&pericfg CLK_PERI_SPI0>; 54 clock-names = "parent-clk", "sel-clk", "spi-clk"; 55 cs-gpios = <&pio 105 GPIO_ACTIVE_LOW>, <&pio 72 GPIO_ACTIVE_LOW>; 56 mediatek,pad-select = <1>, <0>; 57 status = "disabled"; 58}; 59