Re: How to allocate memory and get the physical address in kernel

Hi Silverstri, On Thu, Feb 6, 2014 at 7:56 AM, m silverstri <michael.j.silverstri@gmail.com

wrote:

Hi,

I am developing a kernel driver. I need to allocate buffer in the kernel driver and pass the physical address of the buffer to the Chip register so that it can generate output there.

I tried using kmalloc() but I don' get any output from the chip.

If your device is not having an iommu, you need to convert the address returned by kmalloc using __pa(addr) before you program the chip. Thanks, Arun

Is there a better way to achieve what I want?

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