关于RK3128的spi驱动

zhedward

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";
        };