tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <&topckgen CLK_TOP_SPI_SEL>.
19 The second should be one of the following.
20 - <&clk26m>: specify parent clock 26MHZ.
21 - <&topckgen CLK_TOP_SYSPLL3_D2>: specify parent clock 109MHZ.
22 It's the default one.
23 - <&topckgen CLK_TOP_SYSPLL4_D2>: specify parent clock 78MHZ.
24 - <&topckgen CLK_TOP_UNIVPLL2_D4>: specify parent clock 104MHZ.
25 - <&topckgen CLK_TOP_UNIVPLL1_D8>: specify parent clock 78MHZ.
26
27- clock-names: shall be "spi-clk" for the controller clock, and
28 "parent-clk" for the parent clock.
29
30Optional properties:
31- mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi
32 controller used, this value should be 0~3, only required for MT8173.
33 0: specify GPIO69,70,71,72 for spi pins.
34 1: specify GPIO102,103,104,105 for spi pins.
35 2: specify GPIO128,129,130,131 for spi pins.
36 3: specify GPIO5,6,7,8 for spi pins.
37
38Example:
39
40- SoC Specific Portion:
41spi: spi@1100a000 {
42 compatible = "mediatek,mt8173-spi";
43 #address-cells = <1>;
44 #size-cells = <0>;
45 reg = <0 0x1100a000 0 0x1000>;
46 interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_LOW>;
47 clocks = <&topckgen CLK_TOP_SPI_SEL>, <&topckgen CLK_TOP_SYSPLL3_D2>;
48 clock-names = "spi-clk", "parent-clk";
49 mediatek,pad-select = <0>;
50 status = "disabled";
51};