From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2EB2F1AF0BB; Wed, 25 Jun 2025 17:54:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750874083; cv=none; b=tWIqZ7NjhUV8XclPsCW9FWoiotc4dJtobBNM7f6KJz9j56S6r6txDW0sMDMdWfcsvbnOkerAfPnr9TS3yU6XC9BG579CU1MdH+8hXvoyk0J46ostyWbjg5co6vk+vz9Nm7wrMg2g7cmPE2qC/DPRGib0ja8Vh8viqcGC+/nvywU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750874083; c=relaxed/simple; bh=V/776moD0WP3JA8kmJKpRFhViMjXtiD1Hu+QZ1gN3ik=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=JSZhppCoVGpYxsx2g1mYhb04M6ccBVqUqDMlP8i4fSXJ2KQcOhgglgtmM8rWYR6oBmB6qGZoHLulzl5Qc84Xy9vlu2iYUpOCi4cDiSHr2znaFKy9+DIJ9wApeffQR4dKqEbG5WfRgN5wuCIHxP3f2CCgSKnHM+HsVcgZv8gsYBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a4ZHKFfM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="a4ZHKFfM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6FC41C4CEEA; Wed, 25 Jun 2025 17:54:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750874082; bh=V/776moD0WP3JA8kmJKpRFhViMjXtiD1Hu+QZ1gN3ik=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=a4ZHKFfM/MUH7wdncYY6XrWlP2fPRfVmsLpbFF+gwUxm9ucIgZFB5A819+w4EfYM+ IdC82XoKAqDp92w5NLOvTPSjp6gE9SGH/sFTWE19zj/0YrsqrXGwFNq3E42xElDtgr +Vp1dOHyeR1G+XEKcajNklagWy1jzEF3m/d2xpD/qV5vAnGJu67u/CBOTARe5trz2U Y4jwsjCjh6vxmW0H39DZ3XIgA7wPcKPkqQ+UWs86uUAYiQUYHDf2wzl/Ifvq1QjIht VessRp4F48UN8weEyp0gvCFYX+TbdV7N1EP/Q8Z5efJP+q7PCS4JRYefgayvBidAIG kuBHiMzqzBMPA== Date: Wed, 25 Jun 2025 12:54:41 -0500 From: Bjorn Helgaas To: Claudiu Beznea Cc: Manivannan Sadhasivam , bhelgaas@google.com, lpieralisi@kernel.org, kw@linux.com, manivannan.sadhasivam@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, mturquette@baylibre.com, sboyd@kernel.org, p.zabel@pengutronix.de, linux-pci@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, john.madieu.xa@bp.renesas.com, Claudiu Beznea Subject: Re: [PATCH v2 4/8] PCI: rzg3s-host: Add Initial PCIe Host Driver for Renesas RZ/G3S SoC Message-ID: <20250625175441.GA1579685@bhelgaas> 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: <5ed851fd-6cdc-48f6-ae39-67c95e6ad6d0@tuxon.dev> On Wed, Jun 25, 2025 at 04:07:58PM +0300, Claudiu Beznea wrote: > On 18.06.2025 20:42, Manivannan Sadhasivam wrote: > > On Fri, May 30, 2025 at 02:19:13PM +0300, Claudiu wrote: > >> From: Claudiu Beznea > >> > >> The Renesas RZ/G3S features a PCIe IP that complies with the PCI Express > >> Base Specification 4.0 and supports speeds of up to 5 GT/s. It functions > >> only as a root complex, with a single-lane (x1) configuration. The > >> controller includes Type 1 configuration registers, as well as IP > >> specific registers (called AXI registers) required for various adjustments. > This is how HW manual suggest to do it. The manual is open, it can be > downloaded from [1]. Chapter that describes the steps implemented here is > 34.4.2.4 Issuing Special Requests. > > Steps to reach the HW manual: > 1/ click "RZ/G3S Group User's Manual: Hardware" button > 2/ click confirm > 3/ open the archive > 4/ go to r01uh1014ej0110-rzg3s-users-manual-hardware -> Deliverables > 5/ open r01uh1014ej0110-rzg3s.pdf Nice that the manual is public! URLs are a great invention; it's too bad when we need directions for where to click, etc, in addition to the URL. Maybe one or both of these URLs could be included in the commit log. > [1] > https://www.renesas.com/en/products/microcontrollers-microprocessors/rz-mpus/rzg3s-general-purpose-microprocessors-single-core-arm-cortex-a55-11ghz-cpu-and-dual-core-cortex-m33-250mhz?queryID=695cc067c2d89e3f271d43656ede4d12 https://www.renesas.com/en/document/mah/rzg3s-group-users-manual-hardware?r=25458591