IMX6 spi slave mode device bindings do not work

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IMX6 spi slave mode device bindings do not work

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Contributor III

Hi Everybody, 

I am using linux kernel 5.4.24, and trying to use spi in slave mode

my settings are as follows: 

imx6qdl.dtsi:

ecspi3: spi@2010000 {
   #address-cells = <1>;
   #size-cells = <0>;
   compatible = "fsl,imx6q-ecspi", "fsl,imx51-ecspi";
   reg = <0x02010000 0x4000>;
   interrupts = <0 33 IRQ_TYPE_LEVEL_HIGH>;
   clocks = <&clks IMX6QDL_CLK_ECSPI3>,
   <&clks IMX6QDL_CLK_ECSPI3>;
   clock-names = "ipg", "per";
   dmas = <&sdma 7 7 1>, <&sdma 8 7 2>;
   dma-names = "rx", "tx";
   status = "disabled";
};

 

imx6qdl-sabresd.dtsi:

&ecspi3 {
   pinctrl-0 = <&pinctrl_ecspi3>;
   spi-slave;
   status = "okay";

   slave@0 {
      reg = <0>;
      compatible = "spidev";
      spi-max-frequency = <15000000>;
   };
};

pinctrl_ecspi3: ecspi3grp {
   fsl,pins = <
   MX6QDL_PAD_DISP0_DAT2__ECSPI3_MISO 0x100b1
   MX6QDL_PAD_DISP0_DAT1__ECSPI3_MOSI 0x100b1
   MX6QDL_PAD_DISP0_DAT0__ECSPI3_SCLK 0x100b1
   MX6QDL_PAD_DISP0_DAT3__GPIO4_IO24 0x1b0b0
   >;
};

 

 

when i compile the device tree i get the error: 

DTC arch/arm/boot/dts/imx6dl-sabresd.dtb
arch/arm/boot/dts/imx6qdl.dtsi:417.25-429.7: Warning (spi_bus_bridge): /soc/aips-bus@2000000/spba-bus@2000000/spi@2010000: incorrect #address-cells for SPI bus
also defined at arch/arm/boot/dts/imx6qdl-sabresd.dtsi:385.9-397.3
arch/arm/boot/dts/imx6dl-sabresd.dtb: Warning (spi_bus_reg): Failed prerequisite 'spi_bus_bridge'

although all the examples i see have similar setting when i use these settings i get the error above. Also during boot the related spi device is not probed successfully and device is not listed in /dev/ directory

 

Best Regards

Y. 

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NXP TechSupport
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