On Tue, Oct 12, 2010 at 6:17 PM, Andy Shevchenko <andy.shevchenko@xxxxxxxxx> wrote: > For debugging power managment features there is quite convenient to have a > possibility to change MMC host controller clock at run time. This patch adds > 'clock' file under MMC host root of debugfs. > > Usage as follows: > > Â Â Â Â# cat /sys/kernel/debug/mmc0/clock > Â Â Â Â24000000 Actually this value should be 52000000 here. > > Â Â Â Â# echo "1000000000" > /sys/kernel/debug/mmc0/clock > Â Â Â Â# cat /sys/kernel/debug/mmc0/clock > Â Â Â Â52000000 > > Â Â Â Â# echo "48000000" > /sys/kernel/debug/mmc0/clock > Â Â Â Â# cat /sys/kernel/debug/mmc0/clock > Â Â Â Â48000000 > > The second piece of example shows limits which are applied accordingly to used > host driver. -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
