i.MX ProcessorsのトピックRe: IMX6 SPI

IMX6 SPI

kiruthikavarada — Mon, 23 Mar 2015 13:19:04 GMT

My pin mux setting for SPI is

ecspi1 {

fsl,spi-num-chipselects = <1>;

cs-gpios = <&gpio2 30 0>;

bus-number = <1>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_ecspi1_1>;

status = "okay";

spidev@0 {

compatible = "spidev";

spi-max-frequency = <20000000>;

reg = <0>;

};

pinctrl_ecspi1_1: ecspi1grp-1 {

fsl,pins = <

MX6QDL_PAD_EIM_D17__ECSPI1_MISO 0x100b1

MX6QDL_PAD_EIM_D18__ECSPI1_MOSI 0x100b1

MX6QDL_PAD_EIM_D16__ECSPI1_SCLK 0x100b1

MX6QDL_PAD_EIM_EB2__GPIO2_IO30 0x80000000

};

I am using the SPI master driver provided by freescale.I also enabled User mode SPI driver support.

IMX6 is master and another micro controller is slave.

I am sending data from IMX6 master to slave with user mode spi driver support.

No clock is seen ( IMX_SPI1_SCLK) Is there any change in pinmux setting or spi master driver required??

I am using kernel version 3.10

Re: IMX6 SPI

alejandrolozan1 — Mon, 30 Mar 2015 23:57:57 GMT

Hi,

Make sure that any other node is using the MX6QDL_PAD_EIM_D16 pad.

if there is some other node using it disable it.

Best Regards,

Alejandro

Re: IMX6 SPI

alejandrolozan1 — Tue, 31 Mar 2015 00:03:38 GMT

If you check the dts for the sabreauto they disable the i2c3 due to a pin conflict

&ecspi1 {

pinctrl-assert-gpios = <&gpio5 4 GPIO_ACTIVE_LOW>;

status = "okay";

};

&flexcan2 {

/* max7310_c on i2c3 is gone */

status = "disabled";

};

&i2c3 {

/* pin conflict with ecspi1 */

status = "disabled";

};