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Fri, 27 Jan 2023 08:15:26 -0800 (PST) Message-ID: Date: Fri, 27 Jan 2023 17:15:24 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [PATCH v9 07/10] arm64: dts: ls1046ardb: Add serdes bindings Content-Language: en-US To: Sean Anderson , Shawn Guo Cc: Vinod Koul , Kishon Vijay Abraham I , linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Camelia Alexandra Groza , Madalin Bucur , Bagas Sanjaya , Rob Herring , Ioana Ciornei , linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, Krzysztof Kozlowski , Li Yang References: <20221230000139.2846763-1-sean.anderson@seco.com> <20221230000139.2846763-8-sean.anderson@seco.com> <20230125234335.GC20713@T480> <8074f0be-8a70-a937-49f2-123e0bfc6218@seco.com> <20230127075248.GL20713@T480> <20a9070f-9673-2f51-97df-68e78c37d894@seco.com> From: Krzysztof Kozlowski In-Reply-To: <20a9070f-9673-2f51-97df-68e78c37d894@seco.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230127_081530_119704_E7D6499D X-CRM114-Status: GOOD ( 13.62 ) 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 27/01/2023 17:11, Sean Anderson wrote: >>>>> >>>>> .../boot/dts/freescale/fsl-ls1046a-rdb.dts | 112 ++++++++++++++++++ >>>>> drivers/phy/freescale/Kconfig | 1 + >>>> >>>> The phy driver Kconfig change shouldn't be part of this patch. >>> >>> I put it here for bisectability, since this is the point where we need >>> to enable it. But I can do this in a separate patch if you want. >> >> From DT ABI perspective, it's already broken anyway if you need to change >> kernel and DT atomically. > > AIUI new kernels must work with old device trees, but new device trees need not > work with old kernels. So a change like this is fine, since the kernel won't > touch the serdes if it isn't supplied. You used the argument "bisectability". If the patchset is not bisectable, the ABI is broken. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel