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Fri, 30 Oct 2026 00:37:12 -0700 (PDT) Received: from thinkpad.hgw.local ([159.146.110.109]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e71baa1b3sm1668000f8f.56.2026.10.30.00.37.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2026 00:37:12 -0700 (PDT) From: =?UTF-8?q?Yal=C3=A7=C4=B1n=20Can?= To: u-boot@lists.u-boot-project.org Cc: Dario Binacchi , Michael Trimarchi , Kever Yang , Quentin Schulz , Simon Glass , Tom Rini Subject: [PATCH] mtd: rawnand: rockchip_nfc: set mtd->dev instead of writing through NULL Date: Fri, 30 Oct 2026 10:37:05 +0300 Message-ID: <20261030073705.164572-1-ylcncn@gmail.com> X-Mailer: git-send-email 2.47.3 X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Fri, 30 Oct 2026 12:59:41 +0000 X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-14.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HK_RANDOM_FROM, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 rk_nfc_nand_chip_init() does `mtd->dev->parent = dev`, taken from Linux, where the device is embedded in struct mtd_info. In U-Boot mtd->dev is a pointer and still NULL at this point, so this writes dev to address 0x18. Harmless while address 0 is RAM; on the RK3066 started from the boot ROM it is the ROM, and the write ends in an asynchronous external abort. Set mtd->dev to the controller device instead, as other raw NAND drivers do. Tested on an MK808B (RK3066) from the NAND ID blocks (H27UCG8T2BTR). Co-Authored-By: Claude Opus 5.5 Signed-off-by: Yalçın Can --- drivers/mtd/nand/raw/rockchip_nfc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/rockchip_nfc.c b/drivers/mtd/nand/raw/rockchip_nfc.c index d23a651f..c134045d 100644 --- a/drivers/mtd/nand/raw/rockchip_nfc.c +++ b/drivers/mtd/nand/raw/rockchip_nfc.c @@ -948,7 +948,12 @@ static int rk_nfc_nand_chip_init(ofnode node, struct rk_nfc *nfc, int devnum) mtd = nand_to_mtd(chip); mtd->owner = THIS_MODULE; - mtd->dev->parent = dev; + /* + * mtd->dev is still NULL here: `mtd->dev->parent = dev` (from Linux, where dev is embedded) + * wrote to address 0x18. Harmless only while 0 is RAM; on RK3066 started from the boot ROM + * (soc_remap = 0) it is the ROM, and the write ends in an asynchronous external abort. + */ + mtd->dev = dev; nand_set_controller_data(chip, nfc); -- 2.47.3