Hi,
Can anybody short explain why I need to use ioremap()?
I'm talking about I2C driver for ARM920T based MCU.
I've read several another drivers, and found, that I2C registers are not
read/write directly, but via writel() and readl() functions.
In platform driver probe routine, ioremap() is called.
Why I should do that? Why not read and write directly?
As I understand, drivers in kernel space can access registers directly?
Because I have tested this with simple driver for LED control.
I set some bits in my GPIO register directly:
GPIO_DATA_REG = 0x01;
It is correct or not?
I'm asking, because I want understand this and maybe make my driver
simpler and faster without these "virtual" read and write functions.
Darius.
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