From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: [PATCH RFT 2/2] macb: kill PHY reset code Date: Mon, 11 Apr 2016 22:01:21 +0300 Message-ID: <570BF481.9070903@cogentembedded.com> References: <81129033.NXiOLTg1so@wasted.cogentembedded.com> <2811962.eGX2i5RJbZ@wasted.cogentembedded.com> <20160411022802.GB4307@lunn.ch> <570BE1C5.70502@cogentembedded.com> <20160411181904.GB29709@lunn.ch> <570BEF46.7060105@cogentembedded.com> <20160411185115.GA30623@lunn.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160411185115.GA30623-g2DYL2Zd6BY@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Andrew Lunn Cc: nicolas.ferre-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On 04/11/2016 09:51 PM, Andrew Lunn wrote: >>>>> The code you are deleting would of ignored the flags in the gpio >>>>> property, i.e. active low. >>>> >>>> Hm, you're right -- I forgot about that... :-/ >>>> >>>>> The new code in the previous patch does >>>>> however take the flags into account. Did you check if there are any >>>>> device trees which have flags, which were never used, but are now >>>>> going to be used and thus break... >>>> >>>> Checked this now and found out arch/arm/boot/dts/ar91-vinco.dts. >>>> Looks like it needs to be fixed indeed... >>>> >>> And this is where it gets tricky. You are breaking backwards >>> compatibility by now respecting the flag. An old DT blob is not going >>> to work. >> >> Do we care that much about the DT blobs that are just *wrong*? > > Wrong, but currently works. Note that it's not only using GPIO_ACTIVE_HIGH but does that against what the MACB binding documents. >>> You potentially need to add a new property and deprecate the old one. >> >> I would like to avoid that... > > You will need the agreement from the at91-vinco maintainer. I'll try submitting a formal DT patch... > Andrew MBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html