From: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Date: Fri, 9 Sep 2016 07:06:01 +0000 (+0530)
Subject: ARM64: zynqmp: Add description for LPDDMA channel usage
X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=6af5773700a2470a88a57d61ce55645323d20a0c;p=u-boot.git

ARM64: zynqmp: Add description for LPDDMA channel usage

LPDDMA default allows only secured access.
inorder to enable these dma channels,
one should ensure that it allows non secure access.
This patch updates the same.

Reported-by: Sai Pavan Boddu <saipava@xilinx.com>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index f67238e897..aeeccbf9e9 100644
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -421,7 +421,10 @@
 			power-domains = <&pd_gpu>;
 		};
 
-		/* ADMA */
+		/* LPDDMA default allows only secured access. inorder to enable
+		 * These dma channels, Users should ensure that these dma
+		 * Channels are allowed for non secure access.
+		 */
 		lpd_dma_chan1: dma@ffa80000 {
 			status = "disabled";
 			compatible = "xlnx,zynqmp-dma-1.0";