topic How to set SD clock in I.MX6 in i.MX Processors

How to set SD clock in I.MX6

bpmmaster — Mon, 24 Mar 2014 07:53:32 GMT

Hi,

Because some SDIO devices clock are below 50MHz , Not as IMX51/53, we can set the Max SD clock in board file.

In I.MX6 , there is no Max. Clock setting for SDIO.

please help.

igorpadykov — Thu, 03 Apr 2014 09:49:15 GMT

Yes, correct for i.MX6 there is no max. clock settings because

every ARM sub-arch has a different, incompatible struct clk implementation.

Seems you can add such max. restriction in function _clk_usdhc_round_rate

(clock.c file).

More about Linux clock architecture one can find on eLinux.org:

"Common clock framework: how to use it" - eLinux.org

bpmmaster — Fri, 25 Apr 2014 07:04:57 GMT

thanks