From: Alexander Dahl <ada@thorsis.com>
To: linux-kernel@vger.kernel.org
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
linux-mtd@lists.infradead.org, stable@vger.kernel.org,
Krzysztof Kozlowski <krzk@kernel.org>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Claudiu Beznea <claudiu.beznea@tuxon.dev>,
"Rob Herring (Arm)" <robh@kernel.org>,
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Microchip (AT91) SoC support)
Subject: [PATCH] memory: atmel-ebi: Allow deferred probing
Date: Wed, 29 Apr 2026 14:59:30 +0200 [thread overview]
Message-ID: <20260429125930.844790-1-ada@thorsis.com> (raw)
After removing of_platform_default_populate() calls the atmel-ebi driver
was affected by deferred probing. platform_driver_probe() is
incompatible with deferred probing. This led to atmel-ebi driver
eventually not being probed on at91 sam9x60-curiosity and other sam9x60
based boards. Subsequently the nand-controller driver (nand-controller
being a child node of ebi) on that platform was not probed and thus raw
NAND flash was inaccessible, preventing devices to boot with rootfs on
raw NAND flash (e.g. with UBI/UBIFS).
Fixes: 0b0f7e6539a7 ("ARM: at91: remove unnecessary of_platform_default_populate calls")
Cc: stable@vger.kernel.org
Suggested-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Alexander Dahl <ada@thorsis.com>
---
Notes:
Successfully tested on sam9x60-curiosity board,
and on two custom boards based on sam9x60 and sama5d2.
drivers/memory/atmel-ebi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/memory/atmel-ebi.c b/drivers/memory/atmel-ebi.c
index 8db970da9af96..1e8e8aba2542d 100644
--- a/drivers/memory/atmel-ebi.c
+++ b/drivers/memory/atmel-ebi.c
@@ -628,10 +628,11 @@ static __maybe_unused int atmel_ebi_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume);
static struct platform_driver atmel_ebi_driver = {
+ .probe = atmel_ebi_probe,
.driver = {
.name = "atmel-ebi",
.of_match_table = atmel_ebi_id_table,
.pm = &atmel_ebi_pm_ops,
},
};
-builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe);
+builtin_platform_driver(atmel_ebi_driver);
base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
--
2.47.3
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