NanoPi NEO Core-LTS how to use a 2 slave spi device ?

[DenisS]

I have board  which has 2 slaves on the SPI bus, requiring ce0 and ce1. 

My system: Armbian 23.8.1 Bookworm with Linux 6.1.47-current-sunxi

I applied overlays: spi-add-cs1 and spi-spidev, there's an spi in the system.

As soon as I apply spi-double-spidev-bus.dts, the spi disappears. 

Скрытый текст

/dts-v1/;
/plugin/;

/ {
    compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun8i-h3", "allwinner,sun50i-a64", "allwinner,sun50i-h5";

    fragment@0 {
        target = <&spi0>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            status = "okay";

            spidev@0 {
                reg = <0>; /* Chip Select 0 */
                compatible = "spidev";
                spi-max-frequency = <1000000>;
                status = "okay";
            };
        };
    };

    fragment@1 {
        target = <&spi1>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            status = "okay";

            spidev@0 {
                reg = <0>; /* Chip Select 0 */
                compatible = "spidev";
                spi-max-frequency = <1000000>;
                status = "okay";
            };
        };
    };
};

How to make two cs?

As soon as I apply spi-double-spidev-bus.dts, the spi disappears. 
Also, as I assume there is a problem with CS1, I reassign it with my overlay:   

Скрытый текст

/dts-v1/;
/plugin/;

/ {
        compatible = "allwinner,sun8i-h3";

        fragment@0 {
                target = <&pio>;
                __overlay__ {
                        spi0_cs1: spi0_cs1 {
                                pins = "PC3";
                                function = "gpio_out";
                                output-high;
                        };
            
                };
        };

        fragment@1 {
                target = <&spi0>;
                __overlay__ {
                        pinctrl-names = "default", "default";
                        pinctrl-1 = <&spi0_cs1>;
                        cs-gpios = <&pio 2 3 0>; /* PC3 */
                };
        };

};
 

CS is reassigned in the system, but the spi device polls once. When polling again, errors occur. When I manually set the cs there are no re-polling errors.   

I use "spi-device" - accessing the SPI serial bus using Node.js on Linux boards https://github.com/fivdi/spi-device

On another board, the author's "spi-device" SPI polling works without problems https://github.com/fivdi/spi-device/issues/27 

Please help to make sense of these two issues.
   

[Werner]

Providing logs with 

armbianmonitor -u

 helps with troubleshooting and significantly raises chances that issue gets addressed.

[DenisS]

https://paste.armbian.com/wosilicuda

[DenisS]

I installed my overlay: 

Скрытый текст

/dts-v1/;
/plugin/;

/ {
    compatible = "allwinner,sun8i-h3";

         fragment@2 {
                target = <&pio>;
                __overlay__ {
                        spi0_pi_pins: spi0-pi-pins {
                                pins = "PC0", "PC1", "PC2";
                                function = "spi0";
                        };

                        spi0_cs0_pi_pin: spi0-cs0-pi-pin {
                                pins = "PC3";
                                function = "spi0";
                        };

                        spi0_cs1_pi_pin: spi0-cs1-pi-pin {
                                pins = "PG8";
                                function = "spi0";
                        };
                };
        };

        fragment@1 {
                target = <&spi0>;
                __overlay__ {
                        #address-cells = <1>;
                        #size-cells = <0>;
                        status = "okay";

                        pinctrl-names = "default";
                        pinctrl-0 = <&spi0_pi_pins>;
                        spi-max-frequency = <1000000>;
                        num-chipselects = <2>;
                        spidev@0 {
                                reg = <0>; /* Chip Select 0 */
                                compatible = "armbian,spi-dev";
                                pinctrl-names = "default";
                                pinctrl-0 = <&spi0_cs0_pi_pin>;
                                status = "okay";
                        };

                        spidev@1 {
                                reg = <1>; /* Chip Select 1 */
                                compatible = "armbian,spi-dev";
                                pinctrl-names = "default";
                                pinctrl-0 = <&spi0_cs1_pi_pin>;
                                status = "okay";
                        };
                };
        };
};

two spi's appearing: 
den@nanopineo:~$ ls /dev/ | grep spi
spidev0.0
spidev0.1

den@nanopineo:~$ sudo cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-223, parent: platform/1c20800.pinctrl, 1c20800.pinctrl:
 gpio-67  (                    |spi0 CS0            ) out hi ACTIVE LOW
 gpio-166 (                    |cd                  ) in  hi ACTIVE LOW
 gpio-200 (                    |sysfs               ) out hi
 gpio-203 (                    |sysfs               ) in  lo
 gpio-204 (                    |usb0_id_det         ) in  hi IRQ

gpiochip1: GPIOs 352-383, parent: platform/1f02c00.pinctrl, 1f02c00.pinctrl:
 gpio-355 (                    |k1                  ) in  hi IRQ ACTIVE LOW
 gpio-358 (                    |vdd-cpux            ) out lo
 

den@nanopineo:~$ dmesg | grep spi
[    2.600676] spidev@0 enforce active low on chipselect handle
[    4.022764] sun8i-h3-pinctrl 1c20800.pinctrl: unsupported function spi0 on pin PG8
[    4.022867] spidev spi0.1: there is not valid maps for state default
https://paste.armbian.com/yurepiyuve 

 spi 0.0 doesn't work!
How do I get it to work ? And set PG8 as cs1? 

Edited September 26, 2023 by DenisS

[Gunjan Gupta]

1 hour ago, DenisS said:

spi0_cs1_pi_pin: spi0-cs1-pi-pin {
                                pins = "PG8";
                                function = "spi0";
                        };

Based on the schematics of the board, PG8 only support uart1 or gpio function. So you can't set function = spi0 for the same.

 

Now this is a shot in the dark, but may by you can experiment with cs-gpios property.

[going]

2 часа назад, DenisS сказал:

spi0_cs0_pi_pin: spi0-cs0-pi-pin {
                                pins = "PC3";
                                function = "spi0";
                        };

                        spi0_cs1_pi_pin: spi0-cs1-pi-pin {
                                pins = "PG8";
                                function = "spi0";

function = "gpio_out";