From: Liu Gang <Gang.Liu@nxp.com>
To: robh+dt@kernel.org, shawnguo@kernel.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
scott.wood@nxp.com
Cc: minghuan.lian@nxp.com, Liu Gang <Gang.Liu@nxp.com>, mingkai.hu@nxp.com
Subject: [PATCH] arm64: dts: ls2080a: Add 'dma-coherent' for ls2080a PCI nodes
Date: Thu, 8 Sep 2016 10:31:44 +0800 [thread overview]
Message-ID: <1473301904-27259-1-git-send-email-Gang.Liu@nxp.com> (raw)
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 <Gang.Liu@nxp.com>
---
arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
index e3b6034..4eba766 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
@@ -588,6 +588,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x10 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -612,6 +613,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x12 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -636,6 +638,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <8>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x14 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -660,6 +663,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
+ dma-coherent;
num-lanes = <4>;
bus-range = <0x0 0xff>;
ranges = <0x81000000 0x0 0x00000000 0x16 0x00010000 0x0 0x00010000 /* downstream I/O */
--
2.1.0.27.g96db324
next reply other threads:[~2016-09-08 2:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-08 2:31 Liu Gang [this message]
[not found] ` <1473301904-27259-1-git-send-email-Gang.Liu-3arQi8VN3Tc@public.gmane.org>
2016-09-09 6:05 ` [PATCH] arm64: dts: ls2080a: Add 'dma-coherent' for ls2080a PCI nodes Shawn Guo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1473301904-27259-1-git-send-email-Gang.Liu@nxp.com \
--to=gang.liu@nxp.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=minghuan.lian@nxp.com \
--cc=mingkai.hu@nxp.com \
--cc=robh+dt@kernel.org \
--cc=scott.wood@nxp.com \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).