From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from layka.disroot.org (layka.disroot.org [178.21.23.139]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C76022D6E55 for ; Mon, 11 Aug 2025 18:09:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.21.23.139 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754935797; cv=none; b=ahdfUvAF90LfGQSvxveRlPPxX8awiAcios1cdBr6ZVJ+75ZLugZmMFwomD7U1JajBBNaMDowiayZFbCdZ4Ir4KNaK/7fZuOGP8D4TQsB0xpNSGA87HbrDdKkaTTlgbTm53Que4YGndhhfhufH/NO6Ql+SZdOymEIVh8+D6+Kvkg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754935797; c=relaxed/simple; bh=IHfWofOH+O8x7iEleneRbecji0kLTS0PrMQu3tYrRws=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jeEnXHF/YEu5cpcFYicg+LSHUdzVZkpnMq8FuMcpSSWMFRh+G7ayQ4/kkNMJ2+gZZVckG5UO/p7NTkU4JXMSXotCKgeZ/M/qUj8xXuA9YDvjYizZ/Wo5NZbKEvSn5t6tYzOlto+iQeqdDIOtEksLiIxjEiH85+Tg4lGuXXf+n7A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=disroot.org; spf=pass smtp.mailfrom=disroot.org; dkim=pass (2048-bit key) header.d=disroot.org header.i=@disroot.org header.b=XPD/ANhg; arc=none smtp.client-ip=178.21.23.139 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=disroot.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=disroot.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=disroot.org header.i=@disroot.org header.b="XPD/ANhg" Received: from mail01.disroot.lan (localhost [127.0.0.1]) by disroot.org (Postfix) with ESMTP id 669D122D9F; Mon, 11 Aug 2025 20:09:54 +0200 (CEST) X-Virus-Scanned: SPAM Filter at disroot.org Received: from layka.disroot.org ([127.0.0.1]) by localhost (disroot.org [127.0.0.1]) (amavis, port 10024) with ESMTP id eLziFljdYo3b; Mon, 11 Aug 2025 20:09:53 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=disroot.org; s=mail; t=1754935793; bh=IHfWofOH+O8x7iEleneRbecji0kLTS0PrMQu3tYrRws=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=XPD/ANhgW9xWWTr4p+xWiPkL5CU9ohz8GwQIi0EKiAQOwkZOxWoZGbq/6ydmL3fYk tRJQ6qyoq9mbBlqh0+sNevKPhCuAS0+D4xc5g+gqt2ol4dv4RuWc4F9GGcytrizENA 47wdzaLjJi6/ThRQEKxVUlyWBv/Hxsg5RwUyRT/1rsqDNRbpIcEfY8SBZCCZkIZIK2 3Pto6QtDaCXcpdeaSQBqmP3ySp2unP9RcRmelgtT2Ih1AJoQvMODaO7ezwazBrJPFQ gCtlM6g71MbHBbBi8InA+blfhNRg7xrYrVM+1DoCnCD8msEgk5ADA5UKDWBPdZ9UMg 9j83PhPZt+EUA== Date: Mon, 11 Aug 2025 18:09:45 +0000 From: Yao Zi To: Binbin Zhou , Binbin Zhou , Huacai Chen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Keguang Zhang , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, devicetree@vger.kernel.org, linux-mtd@lists.infradead.org Subject: Re: [PATCH v2 6/8] mtd: rawnand: loongson: Add Loongson-2K0500 NAND controller support Message-ID: References: <89732d64415077ecd9f74c5853c542e62c0dfe26.1754890670.git.zhoubinbin@loongson.cn> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <89732d64415077ecd9f74c5853c542e62c0dfe26.1754890670.git.zhoubinbin@loongson.cn> On Mon, Aug 11, 2025 at 02:03:13PM +0800, Binbin Zhou wrote: > The Loongson-2K0500 NAND controller is similar to the Loongson-1C. > > It supports a maximum capacity of 16GB FLASH per chip with a maximum > page size of 8KB, and it supports up to 4 chip selects and 4 RDY > signals. > > Its DMA controller is defaulted to APBDMA0. > > Signed-off-by: Binbin Zhou > --- > drivers/mtd/nand/raw/Kconfig | 2 +- > .../mtd/nand/raw/loongson-nand-controller.c | 55 ++++++++++++++++++- > 2 files changed, 54 insertions(+), 3 deletions(-) > > diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig > index d9e3f13666ac..7b0c5d06aa95 100644 > --- a/drivers/mtd/nand/raw/Kconfig > +++ b/drivers/mtd/nand/raw/Kconfig > @@ -464,7 +464,7 @@ config MTD_NAND_NUVOTON_MA35 > > config MTD_NAND_LOONGSON > tristate "Loongson NAND controller" > - depends on LOONGSON1_APB_DMA || COMPILE_TEST > + depends on LOONGSON1_APB_DMA || LOONGSON2_APB_DMA || COMPILE_TEST Why is this dependency necessary? I think the DMA operations are done through DMAengine API, and thus the consumer decouples with the DMA provider. If so, I think the depends line should be removed, instead of extended. Regards, Yao Zi > select REGMAP_MMIO > help > Enables support for NAND controller on Loongson family chips.