linux-kernel - [PATCH v02 2/6] ARM: DTS: da850: Use the new DT bindings for the eDMA3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 17 Dec 2015 15:27:48 +0200
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	<nsekhar@...com>, <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<khilman@...prootsystems.com>
Subject: [PATCH v02 2/6] ARM: DTS: da850: Use the new DT bindings for the eDMA3

Switch to use the ti,edma3-tpcc and ti,edma3-tptc binding for the eDMA3.
With the new bindings boards can customize and tweak the DMA channel
priority to match their needs. With the new binding the memcpy is safe
to be used since with the old binding it was not possible for a driver
to know which channel is allowed to be used as non HW triggered channel.
Using the new binding will allow us to reserve PaRAM slots to be used by
the DSP which was not possible before and prevented the da850 boards to be
moved to DT only.

Note that the DMA memcpy is disabled, it can be enabled by reserving
channels for memcpy by adding the following property to the edma node:
ti,edma-memcpy-channels = <20 21>; /* Reserving channel 20 and 21 for memcpy */

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
Tested-by: Sushaanth Srirangapathi <sushaanth.s@...com>
---
 arch/arm/boot/dts/da850-enbw-cmc.dts |  4 ++++
 arch/arm/boot/dts/da850-evm.dts      |  4 ++++
 arch/arm/boot/dts/da850.dtsi         | 26 +++++++++++++++++++++-----
 3 files changed, 29 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boot/dts/da850-enbw-cmc.dts b/arch/arm/boot/dts/da850-enbw-cmc.dts
index e750ab9086d5..1811f8275559 100644
--- a/arch/arm/boot/dts/da850-enbw-cmc.dts
+++ b/arch/arm/boot/dts/da850-enbw-cmc.dts
@@ -28,3 +28,7 @@
 		};
 	};
 };
+
+&edma0 {
+	ti,edma-reserved-slot-ranges = <32 50>;
+};
diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index d807285a61cd..94cf9a9b1302 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -243,3 +243,7 @@
 	tx-num-evt = <32>;
 	rx-num-evt = <32>;
 };
+
+&edma0 {
+	ti,edma-reserved-slot-ranges = <32 50>;
+};
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index e73f5efb3aa3..6e39f9b06524 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -151,11 +151,27 @@
 
 		};
 		edma0: edma@...00000 {
-			compatible = "ti,edma3";
+			compatible = "ti,edma3-tpcc";
 			/* eDMA3 CC0: 0x01c0 0000 - 0x01c0 7fff */
 			reg =	<0x0 0x8000>;
-			interrupts = <11 13 12>;
-			#dma-cells = <1>;
+			reg-names = "edma3_cc";
+			interrupts = <11 12>;
+			interrupt-names = "edma3_ccint", "edma3_ccerrint";
+			#dma-cells = <2>;
+
+			ti,tptcs = <&edma0_tptc0 7>, <&edma0_tptc1 0>;
+		};
+		edma0_tptc0: tptc@...08000 {
+			compatible = "ti,edma3-tptc";
+			reg =	<0x8000 0x400>;
+			interrupts = <13>;
+			interrupt-names = "edm3_tcerrint";
+		};
+		edma0_tptc1: tptc@...08400 {
+			compatible = "ti,edma3-tptc";
+			reg =	<0x8400 0x400>;
+			interrupts = <32>;
+			interrupt-names = "edm3_tcerrint";
 		};
 		serial0: serial@...2000 {
 			compatible = "ns16550a";
@@ -286,8 +302,8 @@
 			interrupts = <54>;
 			interrupt-names = "common";
 			status = "disabled";
-			dmas = <&edma0 1>,
-				<&edma0 0>;
+			dmas = <&edma0 1 1>,
+				<&edma0 0 1>;
 			dma-names = "tx", "rx";
 		};
 	};
-- 
2.6.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/