Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1352572

[PATCH v5 8/9] ARM: dts: r8a7790: add iommus to dmac0 and dmac1

Show all headers | View raw

A unconfirmed hardware bug prevents channel 0 and 15 to be used by the
DMAC together with the IPMMU. The DMAC driver will disable the channels
reducing the effective number of channels to 14 per DMAC.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 arch/arm/boot/dts/r8a7790.dtsi | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 26772f7..c600daa 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -294,6 +294,21 @@
 		power-domains = <&cpg_clocks>;
 		#dma-cells = <1>;
 		dma-channels = <15>;
+		iommus = <&ipmmu_ds 0>,
+			 <&ipmmu_ds 1>,
+			 <&ipmmu_ds 2>,
+			 <&ipmmu_ds 3>,
+			 <&ipmmu_ds 4>,
+			 <&ipmmu_ds 5>,
+			 <&ipmmu_ds 6>,
+			 <&ipmmu_ds 7>,
+			 <&ipmmu_ds 8>,
+			 <&ipmmu_ds 9>,
+			 <&ipmmu_ds 10>,
+			 <&ipmmu_ds 11>,
+			 <&ipmmu_ds 12>,
+			 <&ipmmu_ds 13>,
+			 <&ipmmu_ds 14>;
 	};
 
 	dmac1: dma-controller@e6720000 {
@@ -325,6 +340,21 @@
 		power-domains = <&cpg_clocks>;
 		#dma-cells = <1>;
 		dma-channels = <15>;
+		iommus = <&ipmmu_ds 15>,
+			 <&ipmmu_ds 16>,
+			 <&ipmmu_ds 17>,
+			 <&ipmmu_ds 18>,
+			 <&ipmmu_ds 19>,
+			 <&ipmmu_ds 20>,
+			 <&ipmmu_ds 21>,
+			 <&ipmmu_ds 22>,
+			 <&ipmmu_ds 23>,
+			 <&ipmmu_ds 24>,
+			 <&ipmmu_ds 25>,
+			 <&ipmmu_ds 26>,
+			 <&ipmmu_ds 27>,
+			 <&ipmmu_ds 28>,
+			 <&ipmmu_ds 29>;
 	};
 
 	audma0: dma-controller@ec700000 {
-- 
2.7.2

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH v5 8/9] ARM: dts: r8a7790: add iommus to dmac0 and dmac1 Niklas Söderlund   <niklas.soderlund+renesas@ragnatech.se> - 2016-03-08 03:50 +0100

csiph-web