[SOLVED] I2C: Device driver not found | ZMK | Page 1

honest umbra Feb 18, 2023, 5:00 PM

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I have a shell configured on ttyACM0, and enabled CONFIG_I2C and SHELL_I2C, but when I type i2c scan it tells me:

uart:~$ i2c scan
I2C: Device driver  not found.

Any suggestions on where to look for?

worldly pier Feb 18, 2023, 5:01 PM

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Did you enable any i2c nodes in the DTS?

honest umbra Feb 18, 2023, 5:05 PM

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here's what I have:

for the nice_nano:

&i2c0 {
    compatible = "nordic,nrf-twi";
    sda-pin = <17>;
    scl-pin = <20>;
};

in my shield overlay:

&i2c0 {
    status = "okay";

    trackpad@2a {
      label = "trackpad";
        compatible = "cirque,pinnacle";
        reg = <0x2a>;
    };
};

does that do it?

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the code for the trackpad actually shows error logs, so that part is running. can it be that the trackpad code blocks the i2c shell from working?

worldly pier Feb 18, 2023, 5:23 PM

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That's odd... That should be enough for it to show up. Maybe link to the build, or post the zephyr/.config

honest umbra Feb 18, 2023, 5:25 PM

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here's the config file

📎 config

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and the .dts from the build/zephyr folder in case that helps

📎 zephyr.dts

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in the shell I see:

uart:~$ device list
devices:
- CLOCK (READY)
- GPIO_1 (READY)
- GPIO_0 (READY)
- RNG (READY)
- CDC_ACM_0 (READY)
- HID_0 (READY)
- ADC_0 (READY)
- NRF_FLASH_DRV_NAME (READY)
- I2C_0 (READY)
- EXT_POWER (READY)
  requires: GPIO_0
- BATTERY (READY)
- trackpad (DISABLED)
  requires: I2C_0

I'm not sure why trackpad is disabled, maybe because it couldn't initialize. But still it says i2c_0 is ready

worldly pier Feb 18, 2023, 5:39 PM

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Maybe the trackpad initialization failing is causing the issue.

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Try disabling the trackpad, and seeing if the I2C shell works

honest umbra Feb 18, 2023, 5:42 PM

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just setting status = "disabled" is good?

worldly pier Feb 18, 2023, 5:42 PM

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Yup

honest umbra Feb 18, 2023, 5:49 PM

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it says READY in the shell, and trackpad is not there anymore, but it still says device driver not found

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DEVICE_DT_INST_DEFINE(n, pinnacle_init, NULL, &pinnacle_data_##n, &pinnacle_config_##n, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY, &pinnacle_driver_api);
this is in the driver, should that call pinnacle_init automatically when the driver is set to "okay" or do I need to call it in some way explicitely?

honest umbra Feb 18, 2023, 6:14 PM

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the driver has DT_DRV_COMPAT=cirque_pinnacle and my i2c node has compatible="cirque,pinnacle" so from what I understand it should trigger the init in the driver? but it doesn't seem to do that

honest umbra Feb 23, 2023, 7:49 PM

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worldly pier Maybe the trackpad initialization failing is causing the issue.

so I tried without the trackpad and I still get this "device driver not found"

worldly pier Feb 24, 2023, 5:11 AM

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@honest umbra Oh! You're supposed to specify the bus to scan!

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So i2c scan I2C_0

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static int cmd_i2c_scan(const struct shell *shell_ctx,
            size_t argc, char **argv)
{
    const struct device *dev;
    uint8_t cnt = 0, first = 0x04, last = 0x77;

    dev = device_get_binding(argv[ARGV_DEV]);

    if (!dev) {
        shell_error(shell_ctx, "I2C: Device driver %s not found.",
                argv[ARGV_DEV]);
        return -ENODEV;
    }

honest umbra Feb 24, 2023, 10:18 AM

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Thank you! I'll try it

honest umbra Feb 24, 2023, 3:57 PM

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thank you, that's better, at least the i2c is trying to do something 🙂

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[SOLVED] I2C: Device driver not found

#[SOLVED] I2C: Device driver not found