Ulf Hansson wrote: > On 28 January 2015 at 13:41, Tobias Jakobi <liquid.acid@xxxxxxx> wrote: >> Hello! >> >> Jaehoon Chung wrote: >>> mmc core supported to hw_reset function. >>> So i think we can use it. It's called at only initial time to clear the previous status. >>> But i think it can be called at reboot time. (it needs to implement codes.) >>> how about? >> I don't think that's going the work. The problem here is that depending >> on the board configuration, the eMMC might carry the bootloader. If the >> eMMC subsystem is not properly reset _during_ reboot, the board won't >> even start since no bootloader is found. So we don't even reach the >> point where the kernel does anything. > > I guess it depends on what's being done during the reboot sequence. > > The most proper thing would be to let the boot loader control the GPIO > to trigger the HW reset, but that would mean the boot loader need to > know about board specific configurations, such as which GPIO pin. So > maybe SOC vendors need to state what GPIO pin to use and don't leave > that as a configurable option. Not the bootloader, but the iROM code would have to do this, and as far as I know the iROM can't be modified. Or am I missing something here? With best wishes, Tobias -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
