SPI in /dev not showing in imx6ul custom board

chandraevolute — Thu, 01 Dec 2016 06:03:08 GMT

Hi,

Below is my SPI DT entries

&ecspi1 {
fsl,spi-num-chipselects = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1_1>;
status = "okay";
spidev@0 {
compatible = "spidev";
spi-max-frequency = <20000000>;
reg = <0>;
};

pinctrl_ecspi1_1: ecspi1grp {

fsl,pins = <

MX6UL_PAD_LCD_DATA22__ECSPI4_MOSI 0x100b1

MX6UL_PAD_LCD_DATA20__ECSPI4_SCLK 0x100b1

};

i have no chip selects as I am using single slave connnected to SPI.

My kernel version is Linux version 3.14.38-6UL_ga

below is the kernel log

gpmi-nand 1806000.gpmi-nand: driver registered.
spi_imx 2008000.ecspi: cannot get the TX DMA channel!
spi_imx 2008000.ecspi: dma setup error,use pio instead
spi_imx 2008000.ecspi: probed
usbcore: registered new interface driver usb-storage
2184800.usbmisc supply vbus-wakeup not found, using dummy regulator
2184200.usb supply vbus not found, using dummy regulator
ci_hdrc ci_hdrc.1: doesn't support host
ci_hdrc ci_hdrc.1: no supported roles
snvs_rtc 20cc034.snvs-rtc-lp: rtc core: registered 20cc034.snvs-rtc-lp as rtc0

this is what I found when I searched spi after booting up.

imx6ulevk login: root
root@imx6ulevk:~# find / -name *spi*

/lib/udev/keymaps/acer-aspire_5920g
/lib/udev/keymaps/acer-aspire_5720
/lib/udev/keymaps/acer-aspire_6920
/lib/udev/keymaps/acer-aspire_8930
/sys/bus/spi
/sys/bus/spi/drivers/spidev
/sys/bus/platform/devices/2008000.ecspi
/sys/bus/platform/drivers/spi_gpio
/sys/bus/platform/drivers/spi_imx
/sys/bus/platform/drivers/spi_imx/2008000.ecspi
/sys/bus/platform/drivers/fsl_spi
/sys/bus/platform/drivers/fsl-quadspi
/sys/devices/soc0/soc.0/2000000.aips-bus/2000000.spba-bus/2008000.ecspi
/sys/class/spi_master
/sys/class/spidev
/sys/module/spidev
/proc/irq/63/2008000.ecspi

I am unable to find entry in my /dev folder

Is everything correct or do I need to modify any thing.

Re: SPI in /dev not showing in imx6ul custom board

chandraevolute — Fri, 02 Dec 2016 04:48:38 GMT

got it worked

I changed chiselects from 0 to 1

&ecspi1 {
fsl,spi-num-chipselects = <1>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1_1>;
status = "okay";
spidev@0 {
compatible = "spidev";
spi-max-frequency = <20000000>;
reg = <0>;
};

i.MX Processors中的主题 SPI in /dev not showing in imx6ul custom board

SPI in /dev not showing in imx6ul custom board

Re: SPI in /dev not showing in imx6ul custom board