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 Slave controller
2
3Required properties:
4- compatible: should be one of the following.
5 - mediatek,mt2712-spi-slave: for mt2712 platforms
6 - mediatek,mt8195-spi-slave: for mt8195 platforms
7- reg: Address and length of the register set for the device.
8- interrupts: Should contain spi interrupt.
9- clocks: phandles to input clocks.
10 It's clock gate, and should be <&infracfg CLK_INFRA_AO_SPI1>.
11- clock-names: should be "spi" for the clock gate.
12
13Optional properties:
14- assigned-clocks: it's mux clock, should be <&topckgen CLK_TOP_SPISLV_SEL>.
15- assigned-clock-parents: parent of mux clock.
16 It's PLL, and should be one of the following.
17 - <&topckgen CLK_TOP_UNIVPLL1_D2>: specify parent clock 312MHZ.
18 It's the default one.
19 - <&topckgen CLK_TOP_UNIVPLL1_D4>: specify parent clock 156MHZ.
20 - <&topckgen CLK_TOP_UNIVPLL2_D4>: specify parent clock 104MHZ.
21 - <&topckgen CLK_TOP_UNIVPLL1_D8>: specify parent clock 78MHZ.
22
23Example:
24- SoC Specific Portion:
25spis1: spi@10013000 {
26 compatible = "mediatek,mt2712-spi-slave";
27 reg = <0 0x10013000 0 0x100>;
28 interrupts = <GIC_SPI 283 IRQ_TYPE_LEVEL_LOW>;
29 clocks = <&infracfg CLK_INFRA_AO_SPI1>;
30 clock-names = "spi";
31 assigned-clocks = <&topckgen CLK_TOP_SPISLV_SEL>;
32 assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL1_D2>;
33};