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Wed, 28 Aug 2019 06:46:47 -0700 (PDT) Received: from turing-police ([2601:5c0:c001:4341::359]) by smtp.gmail.com with ESMTPSA id g24sm1327307qtc.38.2019.08.28.06.46.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Aug 2019 06:46:46 -0700 (PDT) From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Google-Original-From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: Dinh Nguyen Subject: Re: [PATCHv5] drivers/amba: add reset control to amba bus probe In-Reply-To: <46bcf493-9dd6-bf5b-089a-be158739a13f@kernel.org> References: <20190826154252.22952-1-dinguyen@kernel.org> <30608.1566933924@turing-police> <46bcf493-9dd6-bf5b-089a-be158739a13f@kernel.org> Mime-Version: 1.0 Date: Wed, 28 Aug 2019 09:46:45 -0400 Message-ID: <292438.1567000005@turing-police> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190828_064658_577430_092B9B82 X-CRM114-Status: GOOD ( 10.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, daniel.thompson@linaro.org, tony.luck@intel.com, manivannan.sadhasivam@linaro.org, keescook@chromium.org, robh@kernel.org, linus.walleij@linaro.org, anton@enomsg.org, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, p.zabel@pengutronix.de, ccross@android.com, frowand.list@gmail.com, linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============7589976042674284858==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============7589976042674284858== Content-Type: multipart/signed; boundary="==_Exmh_1567000004_1612P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit --==_Exmh_1567000004_1612P Content-Type: text/plain; charset=us-ascii On Wed, 28 Aug 2019 08:34:20 -0500, Dinh Nguyen said: > > Does this DTRT for both old and new U-Boots? My naive reading of > > this patch > > What is a DTRT? Do The Right Thing, sorry... > > says on an old U-Boot, we end up attempting to bring it out of > > reset even though they had already been brought out. > > > > If the peripheral is already out of reset, de-asserting the reset has > no affect. OK, thanks. There's been hardware where doing that sort of thing twice will confuse the device and cause issues. --==_Exmh_1567000004_1612P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.9.0 11/07/2018 iQIVAwUBXWaFxAdmEQWDXROgAQJZPhAAopKhP6wn5B9evWUpllhb6CIajYqxhob3 zLAF1vVdOpPXyTT3PaFMjwrqKiPt9QnMLHW5odZ5UswcH4dBRByhwb8Hr8a/Ibo9 Nb6BdK1KuilWx3bCvw63nNH9aB+tPvcaOUtux73gD+HaPa/XCvzZvObCnFCXa4oa 9gQJl8GG8pRLfH03QPSYGKAzyJ35qt2RBarVa0Z19NZPB5LDDePLKwxblatRFICW mhdH1t6uC7CuxMqfHKbG5MyhdmgmmOyHg16tHxZ85B8f0CoCFAHx9sNzvS3dmXZd bP2+r7cQ4kNkIWI/PNPzh+s8D9ZlWYdGn1p2VQU/4FKMh2d7IDS5MvLgA5rf0DiE bOPBbqzfZ/DsfyW96M9e4/53OYYK5gqC+ZaePJKY4BkAHLNtKewczCw6E+kck7OW 4ya+eOEFQzl9wC5XNMrYkdV8DLhftU4qEzAHuNH2vHIK7BK+3ARGB4tSQyTMNi/x yOPY69cLv4llawfjD/y0PSqmvKN1MlIjmxeAD9kh6AoTUNNNRgj0F+T/Ma91uBeV 50x+YgZZ104bD6d3s5U0kIgykQJARE0JivC9fkFuKZXE6vtIAssE3FFLw2NKncXw Sq+YA6DuuSvCdhAWEmYJpbpwREHEGAjLsN+JBxPhV7vbbGhVV1UuYXPDVfp18Moy fW9l0ZeoE+c= =tC0P -----END PGP SIGNATURE----- --==_Exmh_1567000004_1612P-- --===============7589976042674284858== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============7589976042674284858==--