linux-kernel - [PATCH 08/16] ARM: dts: at91: sama5d2: Add DMA bindings for the SPI and UART flx4 functions

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Message-ID: <20200514050301.147442-9-tudor.ambarus@microchip.com>
Date:   Thu, 14 May 2020 05:03:12 +0000
From:   <Tudor.Ambarus@...rochip.com>
To:     <alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com>,
        <Nicolas.Ferre@...rochip.com>
CC:     <robh+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <Codrin.Ciubotariu@...rochip.com>,
        <Tudor.Ambarus@...rochip.com>
Subject: [PATCH 08/16] ARM: dts: at91: sama5d2: Add DMA bindings for the SPI
 and UART flx4 functions

From: Tudor Ambarus <tudor.ambarus@...rochip.com>

Spare boards of duplicating the DMA bindings. Describe the flx4
DMA bindings in the SoC dtsi. Users that don't want to use DMA
for their flexcom functions have to overwrite the flexcom DMA
bindings in their board device tree.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
 arch/arm/boot/dts/at91-sama5d27_som1_ek.dts |  2 ++
 arch/arm/boot/dts/sama5d2.dtsi              | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
index a0deff15fb9a..6ad66d034305 100644
--- a/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/boot/dts/at91-sama5d27_som1_ek.dts
@@ -190,12 +190,14 @@
 				status = "okay";
 
 				uart9: serial@200 {
+					dmas = <0>, <0>;
 					pinctrl-names = "default";
 					pinctrl-0 = <&pinctrl_flx4_default>;
 					status = "disabled"; /* Conflict with spi6 and i2c6. */
 				};
 
 				spi6: spi@400 {
+					dmas = <0>, <0>;
 					pinctrl-names = "default";
 					pinctrl-0 = <&pinctrl_mikrobus_spi &pinctrl_mikrobus1_spi_cs &pinctrl_mikrobus2_spi_cs>;
 					status = "okay"; /* Conflict with uart5 and i2c6. */
diff --git a/arch/arm/boot/dts/sama5d2.dtsi b/arch/arm/boot/dts/sama5d2.dtsi
index dde969a140b4..66aa8d6502d3 100644
--- a/arch/arm/boot/dts/sama5d2.dtsi
+++ b/arch/arm/boot/dts/sama5d2.dtsi
@@ -939,6 +939,15 @@
 					interrupts = <23 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 23>;
 					clock-names = "usart";
+					dmas = <&dma0
+						(AT91_XDMAC_DT_MEM_IF(0) |
+						 AT91_XDMAC_DT_PER_IF(1) |
+						 AT91_XDMAC_DT_PERID(19))>,
+					       <&dma0
+						(AT91_XDMAC_DT_MEM_IF(0) |
+						 AT91_XDMAC_DT_PER_IF(1) |
+						 AT91_XDMAC_DT_PERID(20))>;
+					dma-names = "tx", "rx";
 					atmel,fifo-size = <32>;
 					status = "disabled";
 				};
@@ -949,6 +958,15 @@
 					interrupts = <23 IRQ_TYPE_LEVEL_HIGH 7>;
 					clocks = <&pmc PMC_TYPE_PERIPHERAL 23>;
 					clock-names = "spi_clk";
+					dmas = <&dma0
+						(AT91_XDMAC_DT_MEM_IF(0) |
+						 AT91_XDMAC_DT_PER_IF(1) |
+						 AT91_XDMAC_DT_PERID(19))>,
+					       <&dma0
+						(AT91_XDMAC_DT_MEM_IF(0) |
+						 AT91_XDMAC_DT_PER_IF(1) |
+						 AT91_XDMAC_DT_PERID(20))>;
+					dma-names = "tx", "rx";
 					atmel,fifo-size = <16>;
 					status = "disabled";
 				};
-- 
2.23.0