Re: DTS question - MPC5200b

On Feb 12, 2008 11:07 AM, Jarno Manninen [off-list ref] wrote:

On Tuesday 12 February 2008 19:37:07 Nick wrote:

quoted

How do I specify the timer based on the cell-index?

I don't know if that is possible to do in a one call, but maybe using the
approach from mpc52xx_uart might help?

--clip--
        for_each_node_by_type(np, "serial") {
                if (!of_match_node(mpc52xx_uart_of_match, np))
                        continue;

                /* Is a particular device number requested? */
                devno = of_get_property(np, "port-number", NULL);
                mpc52xx_uart_of_assign(of_node_get(np), devno ? *devno : -1);
        }
--clip--

This code has actually changed in 2.6.25-rc1.  It is now
for_each_matching_node() and the call to of_match_node is no longer
necessary.

And change  serial->gpt, port-number to cell-index and add some logic to
select the devices you want.

use 'reg' instead.  cell-index (and port-number for that matter) will
probably be going away in the near future.

Or if you wan't to do it a bit differently you
could add a pseudo device outside the main tree like

        mydev {
                gpt-dev = <&the_gpt_dev>:
        };

And get it that way. However I don't know if this is recommended approach, but
I've used it for some simple stuff like binding gpt in PWM mode to
framebuffer backlight, along with power-pin.

Yes, this is a good approach too.

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.