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

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Message-ID: <1449237210-16381-3-git-send-email-peter.ujfalusi@ti.com>
Date:	Fri, 4 Dec 2015 15:53:26 +0200
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	<nsekhar@...com>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<khilman@...prootsystems.com>
Subject: [PATCH 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.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 arch/arm/boot/dts/da850-enbw-cmc.dts |  5 +++++
 arch/arm/boot/dts/da850-evm.dts      |  5 +++++
 arch/arm/boot/dts/da850.dtsi         | 27 ++++++++++++++++++++++-----
 3 files changed, 32 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..ca9117624cf9 100644
--- a/arch/arm/boot/dts/da850-enbw-cmc.dts
+++ b/arch/arm/boot/dts/da850-enbw-cmc.dts
@@ -28,3 +28,8 @@
 		};
 	};
 };
+
+&edma0 {
+	ti,edma-reserved-slot-ranges = /bits/ 16 <32 50>;
+	ti,edma-memcpy-channels = /bits/ 16 <20 21>;
+};
diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index d807285a61cd..33467feb272a 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -243,3 +243,8 @@
 	tx-num-evt = <32>;
 	rx-num-evt = <32>;
 };
+
+&edma0 {
+	ti,edma-reserved-slot-ranges = /bits/ 16 <32 50>;
+	ti,edma-memcpy-channels = /bits/ 16 <20 21>;
+};
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index e73f5efb3aa3..9e46eb51a8da 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -151,11 +151,28 @@
 
 		};
 		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>;
+			ti,edma-memcpy-channels = /bits/ 16 <20 21>;
+		};
+		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 +303,8 @@
 			interrupts = <54>;
 			interrupt-names = "common";
 			status = "disabled";
-			dmas = <&edma0 1>,
-				<&edma0 0>;
+			dmas = <&edma0 1 1>,
+				<&edma0 0 1>;
 			dma-names = "tx", "rx";
 		};
 	};
-- 
2.6.3

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