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Date: Mon, 30 May 2016 10:16:43 +0200 From: Arnd Bergmann <arnd@...db.de> To: Nava kishore Manne <nava.manne@...inx.com> Cc: Rob Herring <robh@...nel.org>, "pawel.moll@....com" <pawel.moll@....com>, "mark.rutland@....com" <mark.rutland@....com>, "ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>, "galak@...eaurora.org" <galak@...eaurora.org>, Michal Simek <michals@...inx.com>, Soren Brinkmann <sorenb@...inx.com>, "balbi@...com" <balbi@...com>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, Hyun Kwon <hyunk@...inx.com>, Radhey Shyam Pandey <radheys@...inx.com>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v3] Axi-usb: Add support for 64-bit addressing. On Monday, May 30, 2016 5:46:21 AM CEST Nava kishore Manne wrote: > > > The Axi-usb 5.00 IP is a FPGA based one. This IP needs to support two H/w designs one with 32 bit DMA addressing another one is 64 bit DMA addressing. > And also in the software point for view we don’t have any register to figure out whether it is supporting 32 bit DMA addressing or 64 bit DMA addressing. > To support both the designs I kept addrwidth property in the dt. I think here addrwidth property is make sense to differentiate the h/w configurations. > If you want me to changes it to boolean please let me know I will fix it in the next version. I think boolean would be more logical here, since what is configurable here is not how many bits are supported, but whether the XUSB_DMA_DSAR_ADDR register is present or not. Arnd
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