From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liu Gang Subject: [PATCH] arm64: dts: ls1043a: Add 'dma-coherent' for ls1043a PCI nodes Date: Tue, 7 Jun 2016 14:55:46 +0800 Message-ID: <1465282546-28256-2-git-send-email-Gang.Liu@nxp.com> References: <1465282546-28256-1-git-send-email-Gang.Liu@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1465282546-28256-1-git-send-email-Gang.Liu@nxp.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, shawnguo@kernel.org, robh@kernel.org Cc: minghuan.lian@nxp.com, Liu Gang , leoyang.li@nxp.com, mingkai.hu@nxp.com, scott.wood@nxp.com List-Id: devicetree@vger.kernel.org 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 ls1043a has this capability, so adding this feature to improve the PCI performance. Signed-off-by: Liu Gang --- arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi index de0323b..21a30f7 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi +++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi @@ -479,6 +479,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <4>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000 /* downstream I/O */ @@ -503,6 +504,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <2>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x48 0x00010000 0x0 0x00010000 /* downstream I/O */ @@ -527,6 +529,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <2>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x50 0x00010000 0x0 0x00010000 /* downstream I/O */ -- 2.1.0.27.g96db324