Date: Sun, 12 Jun 2016 11:12:33 -0600 From: Ian Lepore <ian@freebsd.org> To: "Lundberg, Johannes" <johannes@brilliantservice.co.jp>, "freebsd-mobile@freebsd.org" <freebsd-mobile@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: GPIO driver for Intel Atom SoC Message-ID: <1465751553.1188.110.camel@freebsd.org> In-Reply-To: <CAASDrVkw_G38J7owN-pKGOaeUCGUCodoXk84ZKF2GT5WL=3jFA@mail.gmail.com> References: <CAASDrVkw_G38J7owN-pKGOaeUCGUCodoXk84ZKF2GT5WL=3jFA@mail.gmail.com>
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On Sat, 2016-06-11 at 21:59 -0700, Lundberg, Johannes wrote: > Hi > > I want to port the pinctrl-cherryview driver from Linux. > > I've seen there is the gpiobus and a controller gpioc, can any of > these be > leverage when porting pinctrl? > > What is the recommend way to proceed? > > Thanks! > The term 'pinctrl' has a very specific meaning in the FDT/devicetree world which is prevelant in linux these days. A pinctrl driver is not just a gpio controller driver. If the linux driver you're talking about is in fact an FDT pinctrl driver, then you'll essentially be embracing the entire FDT world (it's an alternative to ACPI and hints and other types of metadata for describing hardware). You'll also be breaking new ground in freebsd by being the first to try to use freebsd's FDT support framework on an x86 platform. -- Ian
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