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 47DB8192B66 for ; Mon, 22 Sep 2025 13:57:32 +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=1758549457; cv=none; b=dXFI2C7H9CUvs0GlwHf4bqfoRfUimh244q6w6KWpIWuhy+tEO2R6d3RWEmgJ8Nf4GAtQA1e6kdWt/b6zEL1/XKcNrzruWAurCggsI4w3FgjuQgXSPj6jeEMXvewJgguO0sxrXYhYpc1TDC82NymbLEaTWbChRpTnwHADMRkI9rg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758549457; c=relaxed/simple; bh=X05MIqk5wSS97VARVzKSo1KHwZE+xkkGZtY5mLxE2jM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ovGpPZuG3qgWrZrysSReGb+hB2DpAsuMr/Dn6vRspIloRrl9S7yMe6OQFmvaZdX1Cs5/4EPd4NIiKK/SWxU7Qq04qtLcWYuyWdQ3fM7O+yOhTgVVThXn/JHg2Gi6QLmexUE3Rz8LNkYz1nGm81IDqTyvW9PZUTZVHw5QwIa3ETI= 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=dfxDyNSA; 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="dfxDyNSA" 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=X05M Iqk5wSS97VARVzKSo1KHwZE+xkkGZtY5mLxE2jM=; b=dfxDyNSARQzXHNRjXS21 tzsp4jXhR7LT/JwUxsF9i2/boB2jZeJgVhTbqYrmJ8G2oLeA7MuBBK1lY9illUa7 Dm4Qs4LFSNQav77pEHZABHj/HKiYoo8qjTpkpJ1DwL/l8EUt8hLJUNpmnL3LkPKi lsF2WZF3g26JRo4/J2kLl/tarDqZxOO7lrLxLmV/zQ6tMvEb+w9juN32Zaf1PpcV 8R3KsTKEjS7E1tZ7bPKaK9pK5VhpXtfopGpqyAEmgJNGwPraChrrilRR/z30TbDI eB+HbDTjbV3/xGtGzBslWmlTHNwVqoqiMFHjn2BEFjjhmEr4TMyMosn4H6iNrFI5 TQ== Received: (qmail 751732 invoked from network); 22 Sep 2025 15:57:24 +0200 Received: by mail.zeus03.de with UTF8SMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 22 Sep 2025 15:57:24 +0200 X-UD-Smtp-Session: l3s3148p1@oEv4MmQ/sOsgAwDPXwQHAL/S9V79e5yL Date: Mon, 22 Sep 2025 15:57:19 +0200 From: Wolfram Sang To: Geert Uytterhoeven Cc: Marek Vasut , "Lad, Prabhakar" , linux-clk@vger.kernel.org, Michael Turquette , Stephen Boyd , linux-renesas-soc@vger.kernel.org Subject: Re: [PATCH] clk: renesas: cpg-mssr: Read back reset registers to assure values latched Message-ID: References: <20250918030723.331634-1-marek.vasut+renesas@mailbox.org> <353db156-e518-49c8-96ac-bd138ee64a01@mailbox.org> <9dbc6022-eb97-49af-bda7-1a7a8069609a@mailbox.org> Precedence: bulk X-Mailing-List: linux-clk@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="UJ+sjLqzSsl89P3f" Content-Disposition: inline In-Reply-To: --UJ+sjLqzSsl89P3f Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > So e.g. MSIOF has synchronized resets, while I2C has not, although > both are connected to the peripheral AXI bus... Is this why we need 'read_poll_timeout_atomic' in 'rcar_i2c_do_reset()' then? I have never received a reason besides "HW engineers said so". This is pre-Gen4, though. --UJ+sjLqzSsl89P3f Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmjRVbsACgkQFA3kzBSg KbZB+BAAlp1BwI4XZauhAfZusWDw91IQAHy0jo5Nmam2+u5xbTbzzFNgNmKnw7cD SbkNrH+pkm7liRZru5GknO40oFIEJwzbYDNcL3uq2G1pcg0QTODsJzUcNYl4yflv /whbS8ta7GfygOmOetxBa+wemSnOBIOb8PXQRq0HC26fJ1Q8U5nkP64HQ5v76ZYF wkU/VyQOkpbAZTFifgNSf6F8h05685WUlKoB5rlTj7iMjCsk+sNKCAxZRYdTBX+E hBIhnGpFdMU47NBhbVXadUleUq4hY04saEdkSSqAg1mlvKAICT1SwZXLaQtIixex wWHxlHW7dbvU5GU5Z56edsobYr42VNC1U+F+13gGy1qBfFY6gFsGKsdnEmrqIAdn kMZ3eRgS/nb5q0EotRzoKFLP8K6y1WZdHfsGqLumBmASpNWce16C3sE6apo958TM yYYt7O0vxPke7+qszgbfWYgUn2NMyA7srT0gwqGd64J2D9IMNP9dLp1oxc+5MjHb PLK7FxCcYbhuFDlD+aoG1iufrwo8t2q973dqg9RgXnddjcPg6nY8EZPtGY1VQaSU s8Hhc2whAJSmMN5JGnrTeh3FZxr1yCLsfovseH3EQX3sK88bY0mDw9x00m/+yBJG dvAIb6WUooa25kV1B6xudF4mf4MHn+np4KHuFe2/A1+oRmrKNuI= =DuiL -----END PGP SIGNATURE----- --UJ+sjLqzSsl89P3f--