From: Hans de Goede <hdegoede@redhat.com> To: Arnd Bergmann <arnd@arndb.de> Cc: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Maxime Ripard <maxime.ripard@free-electrons.com>, Chen-Yu Tsai <wens@csie.org>, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree <devicetree@vger.kernel.org> Subject: Re: [PATCH] dt: bindings: Add a generic ethernet device binding Date: Sat, 16 Jul 2016 12:18:40 +0200 [thread overview] Message-ID: <289d5b2e-6232-2c91-f11d-774265e05125@redhat.com> (raw) In-Reply-To: <1788846.r3134d1VMR@wuerfel> Hi, On 15-07-16 22:42, Arnd Bergmann wrote: > On Wednesday, July 13, 2016 12:20:04 PM CEST Hans de Goede wrote: >> +&mmc1 { >> + non-removable; >> + status = "okay"; >> + >> + sdio_wifi: sdio_wifi@1 { >> + compatible = "generic,ethernet" >> + reg = <1>; >> + }; >> +}; > > For discoverable buses, we normally use a compatible property that > reflects the device ID on that bus, e.g. on PCI we have "pci1A2B:3C4D" > and I think that makes more sense than having to come up with strings > for sdio devices. 2 things: 1) The problem here is that different batches of the same board (cheap chinese tablet) have different sdio wifi modules, so we actually cannot specify a vendor / product id as in your example. 2) In some cases we do want an actual compatible because some devices have some oob (out-of-band) going with e.g. gpio-s which cannot be handled by mmc-pwrseq. > In fact, Linux completely ignores the compatible strings on those > buses (pci, usb, sdio, ...), You're mostly right, but at least the brcmfmac driver looks for a compatible in the mmc-host child node describing its sdio function to see if it should check for oob irq information there. > so I think we can just do the same thing > using no compatible string at all. I'm all for not using any compatible string at all, actually I submitted a patch for a sunxi dt file which did that and Maxime pointed out that the compatible is listed as Required in: Documentation/devicetree/bindings/mmc/mmc-card.txt If we can agree to make it optional, then I'll happily submit a patch with that change and Maxime can take my sunxi dts patch as is :) Regards, Hans
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From: hdegoede@redhat.com (Hans de Goede) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] dt: bindings: Add a generic ethernet device binding Date: Sat, 16 Jul 2016 12:18:40 +0200 [thread overview] Message-ID: <289d5b2e-6232-2c91-f11d-774265e05125@redhat.com> (raw) In-Reply-To: <1788846.r3134d1VMR@wuerfel> Hi, On 15-07-16 22:42, Arnd Bergmann wrote: > On Wednesday, July 13, 2016 12:20:04 PM CEST Hans de Goede wrote: >> +&mmc1 { >> + non-removable; >> + status = "okay"; >> + >> + sdio_wifi: sdio_wifi at 1 { >> + compatible = "generic,ethernet" >> + reg = <1>; >> + }; >> +}; > > For discoverable buses, we normally use a compatible property that > reflects the device ID on that bus, e.g. on PCI we have "pci1A2B:3C4D" > and I think that makes more sense than having to come up with strings > for sdio devices. 2 things: 1) The problem here is that different batches of the same board (cheap chinese tablet) have different sdio wifi modules, so we actually cannot specify a vendor / product id as in your example. 2) In some cases we do want an actual compatible because some devices have some oob (out-of-band) going with e.g. gpio-s which cannot be handled by mmc-pwrseq. > In fact, Linux completely ignores the compatible strings on those > buses (pci, usb, sdio, ...), You're mostly right, but at least the brcmfmac driver looks for a compatible in the mmc-host child node describing its sdio function to see if it should check for oob irq information there. > so I think we can just do the same thing > using no compatible string at all. I'm all for not using any compatible string at all, actually I submitted a patch for a sunxi dt file which did that and Maxime pointed out that the compatible is listed as Required in: Documentation/devicetree/bindings/mmc/mmc-card.txt If we can agree to make it optional, then I'll happily submit a patch with that change and Maxime can take my sunxi dts patch as is :) Regards, Hans
next prev parent reply other threads:[~2016-07-16 10:18 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-07-13 10:20 [PATCH] dt: bindings: Add a generic ethernet device binding Hans de Goede 2016-07-13 10:20 ` Hans de Goede 2016-07-14 23:17 ` David Miller 2016-07-14 23:17 ` David Miller [not found] ` <20160714.161707.2089949241813985527.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org> 2016-07-15 6:40 ` Hans de Goede 2016-07-15 6:40 ` Hans de Goede [not found] ` <47a052a1-cc8b-0f75-e44a-450c4a0ac075-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-07-15 6:44 ` Hans de Goede 2016-07-15 6:44 ` Hans de Goede 2016-07-15 17:51 ` David Miller 2016-07-15 17:51 ` David Miller [not found] ` <20160715.105158.2028840258568316933.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org> 2016-07-16 10:12 ` Hans de Goede 2016-07-16 10:12 ` Hans de Goede 2016-07-17 1:02 ` David Miller 2016-07-17 1:02 ` David Miller [not found] ` <1468405204-5845-1-git-send-email-hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-07-15 20:42 ` Arnd Bergmann 2016-07-15 20:42 ` Arnd Bergmann 2016-07-16 10:18 ` Hans de Goede [this message] 2016-07-16 10:18 ` Hans de Goede [not found] ` <289d5b2e-6232-2c91-f11d-774265e05125-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> 2016-07-16 19:19 ` Arnd Bergmann 2016-07-16 19:19 ` Arnd Bergmann
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