On 08/08/2011 01:31 PM, Robin Holt wrote: > On Mon, Aug 08, 2011 at 10:37:58AM +0200, Wolfgang Grandegger wrote: >> On 08/06/2011 04:34 PM, Robin Holt wrote: >>> flexcan driver needs the clk_get, clk_get_rate, etc functions >>> to work. This patch provides the minimum functionality. >> >> This needs some more general thoughts... apart from the question where >> the code should go. >> >> Like for the MSCAN on the MPC5200, the user should be *able* to select >> an appropriate clock source and divider via DTS node properties. >> Currently it seems, that the DTS properties must match some >> pre-configured values, most likely set by the boot loader. Please >> correct me if I'm wrong. For me this is generic and should go into the >> Flexcan driver. From there, a platform specific function, e.g. >> flexcan_set_clock() might be called. > > OK. Dug a bit more. The p1010 built-in clocksource seems to be the > periphereal clock frequency which is system bus frequency divided > by 2. The clock source can not be changed, but the clock divider can > by freezing the interface and setting the CTRL register. This appears
Which bit(s) in the CTRL register is/are this? Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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