From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ie0-f182.google.com ([209.85.223.182]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WnRdx-0002iY-G3 for linux-mtd@lists.infradead.org; Thu, 22 May 2014 11:58:42 +0000 Received: by mail-ie0-f182.google.com with SMTP id as1so3412491iec.41 for ; Thu, 22 May 2014 04:58:20 -0700 (PDT) Date: Thu, 22 May 2014 12:58:16 +0100 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 09/10] mtd: st_spi_fsm: Provide mask to obtain correct boot device pins Message-ID: <20140522115816.GX6679@lee--X1> References: <1400757848-18075-1-git-send-email-lee.jones@linaro.org> <1400757848-18075-10-git-send-email-lee.jones@linaro.org> <20140522115643.GW6679@lee--X1> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20140522115643.GW6679@lee--X1> Cc: Christophe Kerello , computersforpeace@gmail.com, linux-mtd@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Whoops, wrong patch, please ignore this v2. > mtd: st_spi_fsm: Provide documentation for boot device mask property > > The system configuration registers which display which device the system > booted on are in the same place on all boards which support the FSM. > However, the bits do shift every so slightly. To combat these we're > adding a new property which supplies the necessary mask used to abstract > the required information. > > Cc: devicetree@vger.kernel.org > Signed-off-by: Lee Jones > > diff --git a/Documentation/devicetree/bindings/mtd/st-fsm.txt b/Documentation/devicetree/bindings/mtd/st-fsm.txt > index c248939..2ef9710 100644 > --- a/Documentation/devicetree/bindings/mtd/st-fsm.txt > +++ b/Documentation/devicetree/bindings/mtd/st-fsm.txt > @@ -11,6 +11,10 @@ Optional properties: > - st,syscfg : Phandle to boot-device system configuration registers > - st,boot-device-reg : Address of the aforementioned boot-device register(s) > - st,boot-device-spi : Expected boot-device value if booted via this device > + - st,boot-device-msk : Mask to use when extracting boot device from the > + above system config registers > + NB: If any of the st,boot-device-* properties are missing, the driver falls > + back to the default assumption of 'booted from SPI'. > > Example: > spifsm: spifsm@fe902000{ -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog