From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E04644334BC; Wed, 22 Jul 2026 17:46:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784742414; cv=none; b=MsxQinEViF95CMttKI7LNVc8czJG6GEEk1AjuVB2dQchvnV5SYCQVYNV3i+eWKLWN6YLiLi9BXv4lpA78jgPez1BaxA8OpNuuWiaNYHQ1iu9oPMu2ptrYSUEZgVeska1nAjOu3Iqr8BDY7sW29IjDxYvZhgJMZ7Hj9DhJTfqy7I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784742414; c=relaxed/simple; bh=kTYYjT5M8kNlgK4vexPnqHan5LuQH3TukAB6V7Z+lug=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Fl4+3BuDsROohjWVAmifEPCo1uVteyO4HJ1045uIR3vApNbSYzp+NhZHFub0jkC0ZVLRm92coW+QtW7tDztTZ5vIv6DwPyqeH32HrIjtXSJKOi95pYqTvvWiy+xZZcTGCn73wVVCXRdtG6xt7pjZ8CXMXgeNusCly2oBzPUSQqo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KRV249wB; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KRV249wB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1BF0F1F000E9; Wed, 22 Jul 2026 17:46:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784742412; bh=KZkZF2rPu5ZR/LGvwdw9ibp5FkuwgMTaCsJaW4e51to=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=KRV249wBia2OVTj+hl1wFx+sYZT1cRQ22nXpTMRg6c1m1AuAHN1z5z0YoOYi0rNA9 xNahV+llEnZIX49WanAvWXqJ5AMcVyfxQ3DA8EowWEb8XoCLxNt0xUhTRRZExzt6Vk adjtncUKTmhvXagkCtHFM3YVOwPFgT68i6h+q7CEYj1TV6IOacy+42MBaFZrkdAdNr 0zhABJrCYgLP81b9k5ocMGCfY7t34HgQHDYQsM2WV8hdCu5GvFAjXg7nFwk7UyKT2M nxFxk3asIK8EPkmcQNBcevMCEqzAv30uz0bign6Vv/zr6srgqthfx8Mxw8m/sgnqz5 EQBzU92wCC4iA== Date: Wed, 22 Jul 2026 12:46:49 -0500 From: "Rob Herring (Arm)" To: Prabhakar Cc: Brian Masney , linux-renesas-soc@vger.kernel.org, Lad Prabhakar , Geert Uytterhoeven , Prabhakar , Krzysztof Kozlowski , Conor Dooley , Michael Turquette , devicetree@vger.kernel.org, Magnus Damm , linux-watchdog@vger.kernel.org, Stephen Boyd , linux-clk@vger.kernel.org, Fabrizio Castro , linux-kernel@vger.kernel.org, Biju Das , Guenter Roeck , Wim Van Sebroeck Subject: Re: [PATCH v3 5/8] dt-bindings: watchdog: renesas,r9a09g057-wdt: Add CPG/MSSR syscon support Message-ID: <178474240889.1288517.6935023555003107612.robh@kernel.org> References: <20260716123434.2576253-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20260716123434.2576253-6-prabhakar.mahadev-lad.rj@bp.renesas.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=us-ascii Content-Disposition: inline In-Reply-To: <20260716123434.2576253-6-prabhakar.mahadev-lad.rj@bp.renesas.com> On Thu, 16 Jul 2026 13:34:31 +0100, Prabhakar wrote: > From: Lad Prabhakar > > On the Renesas RZ/T2H SoC, the Watchdog Timer Control Register (WDTDCR) > resides within the CPG/MSSR block rather than the WDT address space > itself. > > Previously, this was handled by including a second register range in the > "reg" property. However, this is architecturally incorrect as the CPG/MSSR > block consists of two distinct regions (0x80280000 and 0x81280000) that > contain registers for multiple peripheral blocks. > > Since the CPG/MSSR block is a multi-function block, introduce the > "renesas,sysc" phandle-array property to allow the WDT driver to access > its control register via this shared regmap. > > Mark the use of a second "reg" entry as deprecated in favor of the > new phandle-array approach for SoCs that require WDTDCR access. > > Signed-off-by: Lad Prabhakar > --- > v2->v3: > - Updated property name to "renesas,sysc" > - Updated description about deprecation and use of the new > phandle-array property. > - Updated commit message > > v1->v2: > - No change. > --- > .../watchdog/renesas,r9a09g057-wdt.yaml | 29 +++++++++++++++++-- > 1 file changed, 27 insertions(+), 2 deletions(-) > Reviewed-by: Rob Herring (Arm)