From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 8C3E0470E97 for ; Fri, 21 Aug 2026 15:16:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.117.254.33 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787325407; cv=none; b=bXFECC5dardFZ2FB3POsokxTOv3VEB0j6TuUR4ZNF319K9icEHiEHv2ttUqZnk2usXpseQwO1w1SFOt1XcjYS3T9yavF69zur78i5f8gN1/tM+rWJQhpHfSdA/3Mhy8zC1sZ+BSb4u0aFzmOwtCTCe3i8NvH2K19z5R8ZdZLFWY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787325407; c=relaxed/simple; bh=o3Lcv7294PYDl4eNoalDF2t1m7dQzMqN3DbY9Se2w9A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mu39PFC5jehDK36qnK1HC5k58hGseWVT0xTwcm2JYRtZA9as3nCLoSDu+aDhgz02jBh/vtL06rwlKwZAcrz8lgOCTyH69oV1E8KBx2EpCmwDoGGjKjPBKnnd6zDfph6SyqsKzMXxs8YhNFJ+BVdJAWxilBiNoVG9tVCTDuMqFjM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com; spf=pass smtp.mailfrom=sang-engineering.com; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b=M4gE6aYG; arc=none smtp.client-ip=194.117.254.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="M4gE6aYG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to; s=k1; bh=o3Lc v7294PYDl4eNoalDF2t1m7dQzMqN3DbY9Se2w9A=; b=M4gE6aYGEBCyCtzBkEWs 495czcovPHWppAyyz16rSCxqSCAGREWqL77bBHj92pM9o2ouCi+8a9GdPnOlF9OB YR4wB2M0xmXcZ4PjnjkWWBeTYHkAfmKPqVC0vXI+Y+H5HRgzg9eLHfnkTHnvfw2G DK+AvDI0P3LtIqKY9xH8vJnK69yY9D7kT9JD02WlNvopAvzCuEzDPXJX1jToD6So Wt6/g7W1JxGiUYHaG2vQGfThI/r1Q9W45fl5fBQYtB1Rd3CGR8hEggn2doB03lFL SXybuE9Pr3ZQMbRL5MeTwFOtUb+Z72fiiTR8xalYJ6KVhdFmrfRFY2VshgzSAhdM jw== Received: (qmail 690933 invoked from network); 21 Aug 2026 17:16:43 +0200 Received: by mail.zeus03.de with UTF8SMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 21 Aug 2026 17:16:43 +0200 X-UD-Smtp-Session: l3s3148p1@kaHAH5BZBokujnuu Date: Fri, 21 Aug 2026 17:16:43 +0200 From: Wolfram Sang To: Prabhakar Cc: Alexandre Belloni , Miquel Raynal , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm , linux-rtc@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: Re: [PATCH v5 15/17] rtc: rzn1: Add OF match data to gate SUBU register access Message-ID: References: <20260821135608.275233-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20260821135608.275233-16-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Ss9qUP/QcvfJ7SzW" Content-Disposition: inline In-Reply-To: <20260821135608.275233-16-prabhakar.mahadev-lad.rj@bp.renesas.com> --Ss9qUP/QcvfJ7SzW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Aug 21, 2026 at 02:56:06PM +0100, Prabhakar wrote: > From: Lad Prabhakar >=20 > The RZ/N1 RTC driver selects SCMP mode only when an optional xtal clock > is provided at a valid rate other than 32768 Hz. Without an xtal clock, > or when it runs at 32768 Hz, the driver uses SUBU mode. >=20 > However, the RTCA0SUBU register used by SUBU mode is not present on all > SoCs that integrate a similar variant of the RTC block. Allowing SUBU > mode on those variants would expose RTC offset operations that access a > non-existent register. >=20 > Add OF match data to describe whether the RTC supports the SUBU register. > Reject probe with -EOPNOTSUPP when SUBU mode would be selected on a > variant without SUBU support. >=20 > Signed-off-by: Lad Prabhakar > Suggested-by: Wolfram Sang Reviewed-by: Wolfram Sang Tested-by: Wolfram Sang --Ss9qUP/QcvfJ7SzW Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmqIa9oACgkQFA3kzBSg KbZmohAAlbQrTMY/kAJHtX/JW02vtUjcZJNZmT4KJLd8NQKqO0VNl91s4bne9WAm d3Riaw5mXpTHamBgq+QCNXiI2ZuzR51MRI+Ex8TBshKntX/lH2Oha+Y8YO8rBy+C Mtn2CEzw6boOjpbMEeMbtbncKQmJCjI2Pqhws+cOzGFpVi7D30qFYgDvqslgt5tF EwGarugDGvRLZnmQIOkKSE94TFg7NaMnacH1rDEfpAzW+IxyN9okL+bwNMVNyM9U P4DA5LBEEJzcdqltiiBarYnmQ/bQNTb9dHQpCy0hBNLZC6yMR8QXSz7LtXTobqnZ fpUaz8C64U8b5SHtcUG8HM2vSdjhGZwoB6fMKJiqvrVLjHLYnYvQinQzxmK3YJUF c0mc9i5gl6Fxg4NiSfhp4OT2jr6NG1tugwzOwwfPiYFs3EMMk22M+tADNbOYi3cf BPlnwkPh3kt/tOBDWA9iA30hPn+gn4GX8A4+BWjnSDIFqz6HnObQvSHNDH1PHHEl WkZLMzihbttQZCURr+dPXvv6Mgg1pxhsB0XKCPWhQiOaTkFY9Bm10XCcYf048ejl aqo6sOw8ABj8J8sAaAjA3s0a2hii4NR/2JM5/3MCbwtUiP8tgBWpkqPrE/yxqM+a Je+wIq4Y610UI7ANmb5d37Fdj25GJ0oqneA28Q+9egkfvmA807s= =Uwz0 -----END PGP SIGNATURE----- --Ss9qUP/QcvfJ7SzW--