From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Mon, 30 May 2016 10:16:43 +0200 Subject: [PATCH v3] Axi-usb: Add support for 64-bit addressing. In-Reply-To: References: <1464067268-35299-1-git-send-email-navam@xilinx.com> Message-ID: <5333252.Un7tdhWc5Q@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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