linux-kernel - [RFC PATCH] ARM: dts: at91: sama5d3

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Message-ID: <20230928145655.215481-1-nicolas.ferre@microchip.com>
Date:   Thu, 28 Sep 2023 16:56:55 +0200
From:   <nicolas.ferre@...rochip.com>
To:     <linux-arm-kernel@...ts.infradead.org>,
        Claudiu Beznea <claudiu.beznea@...on.dev>,
        <jerry.ray@...rochip.com>
CC:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        <linux-kernel@...r.kernel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>
Subject: [RFC PATCH] ARM: dts: at91: sama5d3_eds: remove TDES use

From: Nicolas Ferre <nicolas.ferre@...rochip.com>

TDES doesn't probe because of lack of DMA channels left on this
controller. As we don't need TDES HW engine, we prefer to keep DMA
channels for other usage.
Disable TDES for this board.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
---
Hi,

Tell me what you think about this move. I think it makes sense but tell me if
application could suffer from this lack of TDES engine.

Regards,
  Nicolas

 arch/arm/boot/dts/microchip/at91-sama5d3_eds.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama5d3_eds.dts b/arch/arm/boot/dts/microchip/at91-sama5d3_eds.dts
index c287b03d768b..fddd786f8483 100644
--- a/arch/arm/boot/dts/microchip/at91-sama5d3_eds.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama5d3_eds.dts
@@ -284,6 +284,10 @@ timer1: timer@1 {
 	};
 };
 
+&tdes {
+	status = "disabled";
+};
+
 &usb0 {	/* USB Device port with VBUS detection. */
 	atmel,vbus-gpio = <&pioE 9 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
-- 
2.39.2