On Sun, Feb 19, 2017 at 11:19 PM, Heiko Schocher <hs@xxxxxxx> wrote: > Hello all, > > Am 13.02.2017 um 22:31 schrieb Rob Herring: >> >> On Mon, Feb 13, 2017 at 12:38 AM, Heiko Schocher <hs@xxxxxxx> wrote: >>> >>> Hello Rob, >>> >>> >>> Am 10.02.2017 um 16:51 schrieb Rob Herring: >>>> >>>> >>>> On Tue, Feb 07, 2017 at 06:22:04AM +0100, Heiko Schocher wrote: >>>>> >>>>> >>>>> From: Guan Ben <ben.guan@xxxxxxxxxxxx> >>>>> >>>>> Make the EN2 pin optional. This is useful for boards, >>>>> which have this pin fix wired, for example to ground. >>>>> >>>>> Signed-off-by: Guan Ben <ben.guan@xxxxxxxxxxxx> >>>>> Signed-off-by: Mark Jonas <mark.jonas@xxxxxxxxxxxx> >>>>> Signed-off-by: Heiko Schocher <hs@xxxxxxx> >>>>> >>>>> --- >>>>> >>>>> .../devicetree/bindings/net/nfc/trf7970a.txt | 4 ++-- >>>>> drivers/nfc/trf7970a.c | 26 >>>>> ++++++++++++---------- >>>>> 2 files changed, 16 insertions(+), 14 deletions(-) >>>>> >>>>> diff --git a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt >>>>> b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt >>>>> index 32b35a0..5889a3d 100644 >>>>> --- a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt >>>>> +++ b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt >>>>> @@ -5,8 +5,8 @@ Required properties: >>>>> - spi-max-frequency: Maximum SPI frequency (<= 2000000). >>>>> - interrupt-parent: phandle of parent interrupt handler. >>>>> - interrupts: A single interrupt specifier. >>>>> -- ti,enable-gpios: Two GPIO entries used for 'EN' and 'EN2' pins on >>>>> the >>>>> - TRF7970A. >>>>> +- ti,enable-gpios: One or two GPIO entries used for 'EN' and 'EN2' >>>>> pins >>>>> on the >>>>> + TRF7970A. EN2 is optional. >>>> >>>> >>>> >>>> Could EN ever be optional/fixed? If so, perhaps deprecate this property >>>> and do 2 properties, one for each pin. >>> >>> >>> >>> The hardware I have has the EN2 pin fix connected to ground. Looking >>> into http://www.ti.com/lit/ds/slos743k/slos743k.pdf page 19 table 6-3 >>> and 6-4 the EN2 pin is a don;t core if EN = 1. If EN = 0 EN2 pin >>> selects between Power Down and Sleep Mode ... I see no reason why >>> this is not possible/allowed ... >>> >>> Hmm.. I do not like the idea of deprecating the "ti,enable-gpios" >>> property into 2 seperate properties ... but if this would be a reason >>> for not accepting this patch, I can do this ... How should I name >>> the 2 new properties? >> >> >> I guess if this ever happens, then we just add "ti,enable2-gpios" and >> ti,enable-gpios continues to point to EN. We don't need to deprecate >> anything (or maybe just deprecate having both GPIOs on single >> property). >> >> In that case, >> >> Acked-by: Rob Herring <robh@xxxxxxxxxx> > > > gentle ping. > > Are there any more comments to this patch? Is it acceptable as it > is? I acked it, so yes, it is fine. Rob -- 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
