From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Guo Subject: Re: [PATCH] arm64: dts: ls2080a: Add 'dma-coherent' for ls2080a PCI nodes Date: Fri, 9 Sep 2016 14:05:53 +0800 Message-ID: <20160909060553.GH16911@tiger> References: <1473301904-27259-1-git-send-email-Gang.Liu@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1473301904-27259-1-git-send-email-Gang.Liu-3arQi8VN3Tc@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Liu Gang Cc: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, scott.wood-3arQi8VN3Tc@public.gmane.org, minghuan.lian-3arQi8VN3Tc@public.gmane.org, mingkai.hu-3arQi8VN3Tc@public.gmane.org List-Id: devicetree@vger.kernel.org On Thu, Sep 08, 2016 at 10:31:44AM +0800, Liu Gang wrote: > The 'dma-coherent' indicates that the hardware IP block can ensure > the coherency of the data transferred from/to the IP block. This > can avoid the software cache flush/invalid actions, and improve > the performance significantly. > > The PCI IP block of ls2080a has this capability, so adding this > feature to improve the PCI performance. > > Signed-off-by: Liu Gang Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html