[U-Boot] [PATCH 25/27] ARM64: zynqmp: Add description for LPDDMA channel usage

[Michal Simek]

From: Kedareswara rao Appana <appana.durga.rao at xilinx.com>

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 at xilinx.com>
Signed-off-by: Kedareswara rao Appana <appanad at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 arch/arm/dts/zynqmp.dtsi | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index f67238e89725..aeeccbf9e9d0 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 at ffa80000 {
 			status = "disabled";
 			compatible = "xlnx,zynqmp-dma-1.0";
-- 
1.9.1