On Sat, Jul 9, 2011 at 12:23 PM, Mark Brown <broo...@opensource.wolfsonmicro.com> wrote: > On Mon, Jun 13, 2011 at 01:57:36PM -0600, Grant Likely wrote: >> On Mon, Jun 13, 2011 at 10:58 AM, Linus Walleij >> >> I would *strongly* recommend against individual device drivers >> accessing the pinmux api. This is system level configuration code, >> and should be handled at the system level. > > There can also be advantages to putting the pin into the designed mode > without the driver being loaded from the electrical point of view. For > example, selecting appropriate pull values for pads can cut down on > power consumption.
Since the pin control subsystem is reference counting wrt mux settings, one does not exclude the other. So for example a driver may or may not grab a certain set-up of pins and the core platform may do the same, but when they start to request different conflicting things the subsystem will complain, as is apropriate. So this is a very pure driver framework, without policy, it just does what it's told, and will prevent undefined and impossible settings. Atleast that's the idea. Thanks, Linus Walleij _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
