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标题: 关于RK3128的spi驱动 [打印本页]

作者: zhedward 时间: 2021-12-30 15:26
标题: 关于RK3128的spi驱动
我使用SPI进行数据传输，write正常，但一直read一直读不到数据，请问是GPIO配置问题还是驱动需要做哪些配置？
spi0: spi@20074000 {
compatible = "rockchip,rockchip-spi";
reg = <0x20074000 0x1000>;
interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
//pinctrl-0 = <&spi0_txd_mux0 &spi0_rxd_mux0 &spi0_clk_mux0 &spi0_cs0_mux0 &spi0_cs1_mux0>;
//pinctrl-0 = <&spi0_txd_mux1 &spi0_rxd_mux1 &spi0_clk_mux1 &spi0_cs0_mux1 &spi0_cs1_mux1>;
pinctrl-0 = <&spi0_txd_mux2 &spi0_rxd_mux2 &spi0_clk_mux2 &spi0_cs0_mux2>;
rockchip,spi-src-clk = <0>;//<0>;
num-cs = <2>;
clocks =<&clk_spi0>, <&clk_gates7 12>;
clock-names = "spi","pclk_spi0";
dmas = <&pdma 8>, <&pdma 9>;
#dma-cells = <2>;
dma-names = "tx","rx";
status = "okay";
};

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