* [PATCH 3/3] arm64: Mark the Applied Micro X-Gene SATA controller as DMA coherent
[not found] ` <1398447254-18527-1-git-send-email-catalin.marinas-5wv7dgnIgG8@public.gmane.org>
@ 2014-04-25 17:34 ` Catalin Marinas
0 siblings, 0 replies; only message in thread
From: Catalin Marinas @ 2014-04-25 17:34 UTC (permalink / raw)
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: Loc Ho, devicetree-u79uwXL29TY76Z2rM5mHXA
Since the default DMA ops for arm64 are non-coherent, mark the X-Gene
controller explicitly as dma-coherent to avoid additional cache
maintenance.
Signed-off-by: Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>
Cc: Loc Ho <lho-qTEPVZfXA3Y@public.gmane.org>
---
Documentation/devicetree/bindings/ata/apm-xgene.txt | 3 +++
arch/arm64/boot/dts/apm-storm.dtsi | 3 +++
2 files changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/ata/apm-xgene.txt b/Documentation/devicetree/bindings/ata/apm-xgene.txt
index 7bcfbf59810e..a668f0e7d001 100644
--- a/Documentation/devicetree/bindings/ata/apm-xgene.txt
+++ b/Documentation/devicetree/bindings/ata/apm-xgene.txt
@@ -24,6 +24,7 @@ Required properties:
* "sata-phy" for the SATA 6.0Gbps PHY
Optional properties:
+- dma-coherent : Present if dma operations are coherent
- status : Shall be "ok" if enabled or "disabled" if disabled.
Default is "ok".
@@ -55,6 +56,7 @@ Example:
<0x0 0x1f22e000 0x0 0x1000>,
<0x0 0x1f227000 0x0 0x1000>;
interrupts = <0x0 0x87 0x4>;
+ dma-coherent;
status = "ok";
clocks = <&sataclk 0>;
phys = <&phy2 0>;
@@ -69,6 +71,7 @@ Example:
<0x0 0x1f23e000 0x0 0x1000>,
<0x0 0x1f237000 0x0 0x1000>;
interrupts = <0x0 0x88 0x4>;
+ dma-coherent;
status = "ok";
clocks = <&sataclk 0>;
phys = <&phy3 0>;
diff --git a/arch/arm64/boot/dts/apm-storm.dtsi b/arch/arm64/boot/dts/apm-storm.dtsi
index 93f4b2dd9248..f8c40a66e65d 100644
--- a/arch/arm64/boot/dts/apm-storm.dtsi
+++ b/arch/arm64/boot/dts/apm-storm.dtsi
@@ -307,6 +307,7 @@
<0x0 0x1f21e000 0x0 0x1000>,
<0x0 0x1f217000 0x0 0x1000>;
interrupts = <0x0 0x86 0x4>;
+ dma-coherent;
status = "disabled";
clocks = <&sata01clk 0>;
phys = <&phy1 0>;
@@ -321,6 +322,7 @@
<0x0 0x1f22e000 0x0 0x1000>,
<0x0 0x1f227000 0x0 0x1000>;
interrupts = <0x0 0x87 0x4>;
+ dma-coherent;
status = "ok";
clocks = <&sata23clk 0>;
phys = <&phy2 0>;
@@ -334,6 +336,7 @@
<0x0 0x1f23d000 0x0 0x1000>,
<0x0 0x1f23e000 0x0 0x1000>;
interrupts = <0x0 0x88 0x4>;
+ dma-coherent;
status = "ok";
clocks = <&sata45clk 0>;
phys = <&phy3 0>;
--
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