[SOLVED] Where the probe() function's argument comes from?

Issue

I'm studying linux device driver. currently, I understand flows of device driver approximatively, but I dont know how probe() function gets its arguments.

For example, here is my code and this is based on kernel 3.10.

static int gpio_led_probe(struct platform_device *pdev) {
       struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
       struct gpio_leds_priv *priv;
       ....
       priv = gpio_leds_create_of(pdev);
       ....
}

As like this, the argument 'pdev' is using for various point of source. I'm understading when probe() called and it's role, but I cannot find where the data 'pdev' comes from.

thanks for read my thread, and sorry that my english is not good.

Solution

platform device specific data while probing comes from the platform setup code or from device tree. you can find the related code in arch/arm/borad/device files struct platform_device embedded with platform_data structure where you will pass the platform related data to the drivers.

in modern kernels platform data is passed to device drivers through device tree. device tree can be found in /arch/arm/boot/dts/your_device

Answered By - vkumar