Not able to see the SPI in /dev.

[HVerm.3]

we are using stm32mp157f-ev1 and we build the weston image for this board.

We want to enable the SPI-1 on this board

we had applied the following patch to enable the SPI-1

+&spi1 {

  +       status = "okay";

  +       pinctrl-names = "default", "sleep";

  +       pinctrl-0 = <&spi1_pins_a>;

  +       pinctrl-1 = <&spi1_sleep_pins_a>;

  +       cs-gpios = <&gpioz 3 O>;

  +       timeouts = <3>;

  +

  +       spidev@0 {

  +               status = "okay";

  +               compatible = "linux,spidev";

  +               spi-max-frequency = <25000000>;

  +               reg = <0>;

  +       };

  +};

After applying this patch file we get the following information about the SPI in boot logs.

root@stm32mp15-eval:~# dmesg | grep spi

[    2.296064] spi-nor spi0.0: mx66l51235f (65536 Kbytes)

[    2.302910] spi-nor spi0.1: mx66l51235f (65536 Kbytes)

[   24.360006] spi_master spi1: /soc/spi@44004000/spidev@0 has no valid 'reg' property (-22)

[   24.366865] spi_master spi1: Failed to create SPI device for /soc/spi@44004000/spidev@0

[   24.427547] spi_stm32 44004000.spi: driver initialized

and in devices we can also see the SPI1

./devices:

total 0

lrwxrwxrwx 1 root root 0 Jan  1  2000 spi0.0 -> ../../../devices/platform/soc/58003000.spi/spi_master/spi0/spi0.0

lrwxrwxrwx 1 root root 0 Jan  1  2000 spi0.1 -> ../../../devices/platform/soc/58003000.spi/spi_master/spi0/spi0.1

lrwxrwxrwx 1 root root 0 Sep 21 12:11 spi1.0 -> ../../../devices/platform/soc/44004000.spi/spi_master/spi1/spi1.0

But we are not able to see any information in /dev.

What i am assuming that in /dev, there should be spidevx.y so that it can be used by user application.

Please suggest what we are missing

[PatrickF]

HI @HVerm.3​ 

isn't a typo in cs-gpios line ? Should be a 0 and not an O

 cs-gpios = <&gpioz 3 O>;

Regards,

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[HVerm.3]

Yes, it was typo error.

I would like to inform you that we do the following changes in patch file for device tree

compatible = "rohm,dh2228fv"

instead of using

compatible = "linux,spidev";

Then we can see the spidev0.0 in /dev folder

Is this right approach ?