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Tue, 10 Sep 2024 16:48:30 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Tue, 10 Sep 2024 21:48:10 +0100 From: "Jiaxun Yang" To: "Serge Semin" Cc: "Thomas Bogendoerfer" , "paulburton@kernel.org" , "linux-mips@vger.kernel.org" , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Message-Id: In-Reply-To: <7j6cc5i4z4nwg73fowjz756eblnesglqm72jveygqfxngw26mc@sdy6xxomo3qe> References: <20240612-cm_probe-v2-0-a5b55440563c@flygoat.com> <20240612-cm_probe-v2-6-a5b55440563c@flygoat.com> <79acb1b1-9c1c-4a58-91a5-5dbb286717ec@app.fastmail.com> <7j6cc5i4z4nwg73fowjz756eblnesglqm72jveygqfxngw26mc@sdy6xxomo3qe> Subject: Re: [PATCH v2 6/6] MIPS: cm: Probe GCR address from DeviceTree Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable =E5=9C=A82024=E5=B9=B49=E6=9C=8810=E6=97=A5=E4=B9=9D=E6=9C=88 =E4=B8=8B=E5= =8D=889:07=EF=BC=8CSerge Semin=E5=86=99=E9=81=93=EF=BC=9A [...] > Both MIPS P5600 and P6600 databooks define the GCR_BASE field as > optionally R/W: > > GCR_BASE 31:15 This field sets the base address of the 32KB R= or R/W > GCR block of the P5600 MPS. (= IP Config- > This register has a fixed value after reset if = uration) > configured as Read-Only (an IP Configuration Option). > Thanks for the pointer, I traced code history and it seems like MIPS dec= ided to not expose this functionality at some point, but documents were not u= pdated. Maybe I should add a read back check here. Thanks --=20 - Jiaxun