Driver required for every level of connection?

[david_8274]

Hi,

Is it true that a driver is needed for each level of hardware connection? For example, on my board there is a touch screen, between the touch screen and the SOC there is a touch screen controller chip. The controller chip is connected to the SOC on its i2c bus. So is it true that the following drivers are involved? 1)a i2c but driver, 2) a driver for the touch screen controller chip, 3) a driver for the touch screen.

Thanks,
Wei

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