Hi Martin,
Thanks for the response.
First I do not know how to do it from U-Boot. But I found it might better to do it in mach_setup.c where l4x_arm_devices_init() is called.
However, I checked the implementation of native linux, it use Device Tree Blob to feed initialize process with data. It would be great if I could load dtb into L4Linux too. Otherwise, a lot of modification job are needed.
I noticed in this tread, you have asked a question about dtb, and Adam give a answer. https://www.mail-archive.com/l4-hackers%40os.inf.tu-dresden.de/msg06539.html Did you get success?
-Yunchuan
On 08/08/2014 01:20 PM, Martin Schröder wrote:
Hi Yunchuan,
Am 08.08.2014 um 10:49 schrieb Yunchuan Geng:
Hi, L4hackers,
I am implementing I2C drivers from native linux to L4Linux. I am using Freescale iMX6Q SD board. Kernel version 3.14
in ./drivers/i2c/busses/i2c-imx.c, function i2c_imx_probe(),
devm_clk_get() is called. And fails at here. I understand that clock are initialized from function "__init imx6q_clocks_init()". I managed to compile and call the imx6q_clocks_init() function from L4Linux, but encountered many problem.
The question is, Is it necessary to initialize clocks in L4Linux and how?
I had the same problem with clocking of the network driver in fec_main.c. My approach is to do the clock setup outside of l4linux, preferably let the bootloader (U-Boot) do this for me. So when the driver is probed all clock setup can be skipped in the driver.
Martin
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