linux-kernel - [PATCH v2] ARM: dts: at91: sama5d4

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Date:   Fri, 16 Jul 2021 18:47:39 +0300
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <ludovic.desroches@...rochip.com>
CC:     <claudiu.beznea@...rochip.com>, <eugen.hristev@...rochip.com>,
        <codrin.ciubotariu@...rochip.com>, <emil.velikov@...labora.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Tudor Ambarus" <tudor.ambarus@...rochip.com>
Subject: [PATCH v2] ARM: dts: at91: sama5d4_xplained: Remove spi0 node

sama5d4_xplained has an optional on-board serial DataFlash (AT25DF321A),
which does not come populated on board by default. Since the spi0 node
does not have any child populated by default, thus no user on
sama5d4_xplained, remove it. This avoids the following error in SPI NOR,
which reads the values of the pulled downed lines, unrecognizing the flash:

spi-nor spi0.0: unrecognized JEDEC id bytes: 00 00 00 00 00 00

Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
 arch/arm/boot/dts/at91-sama5d4_xplained.dts | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/arm/boot/dts/at91-sama5d4_xplained.dts b/arch/arm/boot/dts/at91-sama5d4_xplained.dts
index 0b3ad1b580b8..046796c5b9b0 100644
--- a/arch/arm/boot/dts/at91-sama5d4_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d4_xplained.dts
@@ -38,16 +38,6 @@ uart0: serial@...04000 {
 				status = "okay";
 			};
 
-			spi0: spi@...10000 {
-				cs-gpios = <&pioC 3 0>, <0>, <0>, <0>;
-				status = "okay";
-				m25p80@0 {
-					compatible = "atmel,at25df321a";
-					spi-max-frequency = <50000000>;
-					reg = <0>;
-				};
-			};
-
 			i2c0: i2c@...14000 {
 				i2c-digital-filter;
 				status = "okay";
-- 
2.25.1