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Thu, 09 Dec 2021 13:32:46 -0800 (PST) Subject: Re: [PATCH v1 4/4] PCI: brcmstb: Augment driver for MIPs SOCs To: Jim Quinlan , linux-pci@vger.kernel.org, linux-mips@vger.kernel.org, Nicolas Saenz Julienne , Bjorn Helgaas , Kevin Cernekee , bcm-kernel-feedback-list@broadcom.com, james.quinlan@broadcom.com Cc: Lorenzo Pieralisi , Rob Herring , =?UTF-8?Q?Krzysztof_Wilczy=c5=84ski?= , Florian Fainelli , open list , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" References: <20211209204726.6676-1-jim2101024@gmail.com> <20211209204726.6676-5-jim2101024@gmail.com> From: Florian Fainelli Message-ID: <7f59e65a-085a-2aa1-e736-020ffe82743e@gmail.com> Date: Thu, 9 Dec 2021 13:32:43 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211209204726.6676-5-jim2101024@gmail.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211209_133248_511661_367CB5F2 X-CRM114-Status: GOOD ( 15.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 12/9/21 12:47 PM, Jim Quinlan wrote: > The current brcmstb driver works for Arm and Arm64. A few things are > modified here for us to support MIPs as well. > > o There are four outbound range register groups and each directs a window > of up to 128MB. Even though there are four 128MB DT "ranges" in the > bmips PCIe DT node, these ranges are contiguous and are collapsed into > a single range by the OF range parser. Now the driver assumes a single > range -- for MIPs only -- and splits it back into 128MB sizes. > > o For bcm7425, the config space accesses must be 32-bit reads or > writes. In addition, the 4k config space register array is missing > and not used. > > o The registers for the upper 32-bits of the outbound window address do > not exist. > > o Burst size must be set to 256 (this refers to an internal bus). > > Signed-off-by: Jim Quinlan Acked-by: Florian Fainelli -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel