From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C323207A14; Tue, 4 Feb 2025 09:20:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738660828; cv=none; b=iIHsPe618EmQABQCr66bJP8TNuNeJT65VBA3V4aEBGNcyPlQcZOFqTPjlgkIN36+zVGnYVT4c3Hw8W+GNvJ2gEwhl5fV41+GqmBEthnApXy53LZlfF5t0ecotTLsu4uC+QPKhydbYxolgJdeUAVaEoISs5+gEY1ZOV1oQFBXx20= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738660828; c=relaxed/simple; bh=rauOalsmd53sQxTxWW+uFzWBgqNaCYhWVzouMA54tTg=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=PTs3GNmmTDKxZkSlQYy4JJUXk/2bQ2K8QVk4MIySdmYyykcPso7UrH1yYTBgk68sq+OyGq+6bauTEN+tmH2k2AZsl1Llv936tEuScuviGG3zKPKr9J6+qL5Lgdk+grTb6foHXKzKdqNgT0ArgRQMfF8ACQRy5E6R+xCXf/jsfaY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=lJ41Dndb; arc=none smtp.client-ip=217.70.183.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="lJ41Dndb" Received: by mail.gandi.net (Postfix) with ESMTPSA id DF3AD42CCD; Tue, 4 Feb 2025 09:20:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1738660819; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rauOalsmd53sQxTxWW+uFzWBgqNaCYhWVzouMA54tTg=; b=lJ41DndbhSwaKVTS9QcQq8lKiruEm45BV3yrs1ZR0Y8qpvjzNkhgbENBF2P6XUUkkW/4Yl maveDONaBpvr4ypfy7kXlHClI+PaLdSNM0l9JmzGwRi3AWiUV0wx/3WYUMI9j/NUdhyFo0 LuFxREbXDl8OwRqQ7hhJxA6QmaUL2qD6DzCV21eYDb4qWFEU0BwPPKpUZ1FXD1vu3cAB5C CRPDqWXhrRXauyMPNBAZ1L5JeK3w1iF7IJlt76ZpRxQIxw0O/SeB9FoBn8VgjUe+nAhbgT 7OfGPfHBusjszCYT60w2yb0UqQQU5IDbge2GZFKeYi8heAXMok9axBXUK7GjfA== From: Miquel Raynal To: "Rabara, Niravkumar L" Cc: Richard Weinberger , Vignesh Raghavendra , "linux@treblig.org" , Shen Lichuan , Jinjie Ruan , "u.kleine-koenig@baylibre.com" , "linux-mtd@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: Re: [PATCH v2 1/3] mtd: rawnand: cadence: support deferred prob when DMA is not ready In-Reply-To: (Niravkumar L. Rabara's message of "Tue, 4 Feb 2025 07:48:57 +0000") References: <20250116032154.3976447-1-niravkumar.l.rabara@intel.com> <20250116032154.3976447-2-niravkumar.l.rabara@intel.com> <87plkgpk8k.fsf@bootlin.com> <874j1i0wfq.fsf@bootlin.com> <87msf8z5uu.fsf@bootlin.com> User-Agent: mu4e 1.12.7; emacs 29.4 Date: Tue, 04 Feb 2025 10:20:17 +0100 Message-ID: <87o6zi83se.fsf@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddvtddufecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefujghffgffkfggtgfgsehtqhertddtreejnecuhfhrohhmpefoihhquhgvlhcutfgrhihnrghluceomhhiqhhuvghlrdhrrgihnhgrlhessghoohhtlhhinhdrtghomheqnecuggftrfgrthhtvghrnhepteehkeelvddvheehtdefkedtjeeutedthfegudekgeefleetkeettdekiefftdeinecuffhomhgrihhnpegsohhothhlihhnrdgtohhmnecukfhppeeltddrkeelrdduieefrdduvdejnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepledtrdekledrudeifedruddvjedphhgvlhhopehlohgtrghlhhhoshhtpdhmrghilhhfrhhomhepmhhiqhhuvghlrdhrrgihnhgrlhessghoohhtlhhinhdrtghomhdpnhgspghrtghpthhtohepuddtpdhrtghpthhtohepnhhirhgrvhhkuhhmrghrrdhlrdhrrggsrghrrgesihhnthgvlhdrtghomhdprhgtphhtthhopehrihgthhgrrhgusehnohgurdgrthdprhgtphhtthhopehvihhgnhgvshhhrhesthhirdgtohhmpdhrtghpthhtoheplhhinhhugiesthhrvggslhhighdrohhrghdprhgtphhtthhopehshhgvnhhlihgthhhurghnsehvihhvo hdrtghomhdprhgtphhtthhopehruhgrnhhjihhnjhhivgeshhhurgifvghirdgtohhmpdhrtghpthhtohepuhdrkhhlvghinhgvqdhkohgvnhhighessggrhihlihgsrhgvrdgtohhmpdhrtghpthhtoheplhhinhhugidqmhhtugeslhhishhtshdrihhnfhhrrgguvggrugdrohhrgh X-GND-Sasl: miquel.raynal@bootlin.com Hello, > My apologies for the confusion. > Slave DMA terminology used in cadence nand controller bindings and > driver is indeed confusing.=20=20 > > To answer your question it is,=20 > 1 - External DMA (Generic DMA controller). > > Nand controller IP do not have embedded DMA controller (2 - peripheral DM= A).=20 > > FYR, how external DMA is used.=20 > https://elixir.bootlin.com/linux/v6.13.1/source/drivers/mtd/nand/raw/cade= nce-nand-controller.c#L1962 In this case we should have a dmas property (and perhaps dma-names), no? Miqu=C3=A8l