On Mon, Sep 1, 2014 at 9:46 AM, Dirk Behme <dirk.be...@de.bosch.com> wrote: > On 29.08.2014 21:01, Mark Brown wrote:
>> Any current boards should be using DT and so shouldn't be using fixed >> GPIO numbers in the first place which will mean they'll not end up >> getting zero as a valid GPIO. > > Hmm? What's wrong with a DT entry > > <&gpio1 0 0>; > > for ena_gpio resulting in zero as a valid GPIO? I don't know if it's relevant to the discussion but that is not GPIO #0 in the global GPIO numberspace, it is *offset* zero on some gpio_chip named gpio1. At probe time that chip is given some base offset and offset 0 becomes the global GPIO number (base+offset) so if that GPIO chip starts from 128 this indicates global GPIO number 128. Or something totally different. It's a Linux-specific implementation detail, all DT GPIO notations are relative offsets. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
