Hi
I am having some issue getting the SPI to work on IMX6. The question I have is how do we enable multiple CS on SPI. This is what I currently have.
ecspi1 is using its 2 native chipselects and I also have a gpio CS.
This is what i did in my .dtsi file
ecspi1 {
pinctrl_ecspi1_cs_1: ecspi1_cs_grp-1 {
fsl,pins = <
MX6QDL_PAD_KEY_ROW2__GPIO4_IO11 0x80000000 /* GPIO CS*/
MX6QDL_PAD_KEY_COL2__ECSPI1_SS1 0x80000000
MX6QDL_PAD_KEY_ROW1__ECSPI1_SS0 0x80000000
>;
};
&ecspi1 {
fsl,spi-num-chipselects = <3>;
cs-gpios = <&gpio4 11 0>, <&gpio4 10 0>, <&gpio4 9 0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1_2>, <&pinctrl_ecspi1_cs_1>;
status = "okay";
ads7846@0x00 {
reg = <0>; /* CS0 */
compatible = "ti,ads7846";
interrupt-parent = <&gpio1>;
interrupts = <4 1>;
spi-max-frequency = <1500000>;
pendown-gpio = <&gpio1 4 0>;
vcc-supply = <®_soc>;
ti,x-min = /bits/ 16 <4200>;
ti,x-max = /bits/ 16 <8080>;
ti,y-min = /bits/ 16 <4330>;
ti,y-max = /bits/ 16 <7980>;
ti,x-plate-ohms = /bits/ 16 <180>;
ti,pressure-max = /bits/ 16 <255>;
ti,debounce-max = /bits/ 16 <10>;
ti,debounce-tol = /bits/ 16 <3>;
ti,debounce-rep = /bits/ 16 <1>;
ti,settle-delay-usec = /bits/ 16 <150>;
ti,keep-vref-on;
ti,swap-xy;
linux,wakeup;
};
io_expander_1: spi_imx@0x00 {
compatible = "spi_imx";
spi-max-frequency = <20000000>;
reg = <1>;
};
io_expander_2: spi_imx@0x01 {
compatible = "spi_imx";
spi-max-frequency = <20000000>;
reg = <2>;
};
};
But I dont seem to get the io_expanders enables and noting appears in my /dev folder.
Any Ideas
