Hello!
I'm working with iMX8DXL, kernel 5.10.72 (BSP).
I wrote a custom platform driver and I can't get the function probe to be called.
I tried to compile within kernel and also as a module and load it using insmod.
In my dts file I added a new node in root node:
/{
...
my_gpio {
compatible = "juanma,my-gpio-ctrl";
};
};
Also I tried to add: status = "okay";
In my_gpio.c I tried to register it from init function with "platform_driver_register" and directly using "module_platform_driver". None of them works.
static int my_gpio_probe(struct platform_device *pdev)
{
pr_info( "%s called!\n",__func__);
return 0;
}
static const struct of_device_id my_gpio_of_ids[] = {
{ .compatible = "juanma,my-gpio-ctrl", 0, },
{}
};
MODULE_DEVICE_TABLE(of, my_gpio_of_ids);
static struct platform_driver my_gpio_ctrl = {
.probe = my_gpio_probe,
.remove = my_gpio_remove,
.driver = {
.name = "my-gpio-ctrl",
.of_match_table = of_match_ptr(my_gpio_of_ids),
.owner = THIS_MODULE,
}
};
module_platform_driver(my_gpio_ctrl);
If I use init function instead of 'module_platform_driver()'
static int __init my_gpio_init(void)
{
pr_info( "%s: init\n", __func__);
platform_driver_register(&my_gpio_ctrl);
pr_info( "%s: driver registered.\n", __func__);
return 0;
}
static void __exit my_gpio_exit(void)
{
platform_driver_unregister(&my_gpio_ctrl);
pr_info( "%s exit\n", __func__);
}
module_init(my_gpio_init);
module_exit(my_gpio_exit);
I got the print of my init function, but probe is not called either.
What am I missing?
