Hi Arnd, On Fri, Feb 11, 2011 at 08:35:34AM +0800, Shawn Guo wrote: > > > > + unsigned present:1; > > > > Your card detection by polling through this variable is > > really bad for power management. Is there really no interrupt > > that gets triggered when installing or removing a card? > > > Good point. Will try to use interrupt. > I'm trying to use interrupt for card detection. But unfortunately, I got stuck for some reason. There is a known issue that mx28 gpio interrupt from bank0 can not work, because the pin bank0 irq number 127 was used in get_irqnr_and_base (entry-macro.S) to tell there is no pending interrupt any more. The mmc0 cd pin has no problem to trigger interrupt, as it's GPIO_2_9. But mmc1 cd pin can not, because it's GPIO_0_20. So I probably have to stay with polling. Regards, Shawn -- 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
