Sat, 29 Mar 2014 14:51:34 +0100 от Rafał Miłecki <zajec5@xxxxxxxxx>: > 2014-03-29 14:33 GMT+01:00 Alexander Shiyan <shc_work@xxxxxxx>: > > Sat, 29 Mar 2014 14:16:40 +0100 от Hauke Mehrtens <hauke@xxxxxxxxxx>: > >> The Huawei E970, the only device with a bcm47xx SoC which uses this gpio > >> watchdog I know of, needs the gpio driver very early. It is not possible > >> to deactivate the watchdogs, so it has to get trigged very early in the > > > > Why it cannot be deactivated? > > The driver has been designed for ADM70x ICs, where watchdog is > > deactivated by set GPIO to tristate. > > I'm not sure how to achieve tri-state with Broadcom SoC. Our code is in: > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/bcma/driver_gpio.c > > We have bcma_chipco_gpio_control that sets if GPIO is controlled by > ChipCommon (part of the SoC, one of many cores). > Maybe setting GPIO to be *not* controlled by ChipCommon will make it tri-state? > > Any other ideas? Usually this should be done by setup GPIO direction to input. --- ��.n��������+%������w��{.n����z�{��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
