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Sat, 21 Jan 2023 12:27:54 -0800 (PST) Message-ID: <3114bdeb-c8eb-3a3a-0d68-ca3370ce64ec@linaro.org> Date: Sat, 21 Jan 2023 21:27:52 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.0 Subject: Re: [PATCH 8/9] ARM: multi_v7_defconfig: Add options to support TQMLS102xA series Content-Language: en-US To: "Russell King (Oracle)" Cc: Alexander Stein , Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Olof Johansson , Shawn Guo , Li Yang , Marek Vasut , Marcel Ziswiler , soc@kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20230119144236.3541751-1-alexander.stein@ew.tq-group.com> <20230119144236.3541751-9-alexander.stein@ew.tq-group.com> <2168770.1BCLMh4Saa@steina-w> From: Krzysztof Kozlowski In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230121_122758_025187_5F83EBEC X-CRM114-Status: GOOD ( 15.34 ) 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 20/01/2023 15:57, Russell King (Oracle) wrote: > On Fri, Jan 20, 2023 at 12:35:41PM +0100, Krzysztof Kozlowski wrote: >> Defconfig=y is only for critical stuff needed to bring initramfs. Time >> is not needed for initramfs. > > Are I2C drivers "critical stuff"? What about AHCI drivers? What about > all the USB HCI drivers? USB Storage can certainly be loaded from an > initramfs, yet it's =y. LED triggers? Loads of RTC drivers that are > marked as =y? XOR drivers? VIRTIO drivers? Filesystems? I seem to > remember Red Hat sets even popular filesystems to be a module in their > kernel. Almost all your answers above - these should be =m. USB not always, because it is used for USB Ethernet adapters which is used for network boot (although even then initramfs comes with actual drivers...) > > Clearly, "defconfig=y is only for critical stuff" is rather false in > practice, and I suspect is little more than a desire rather than a > rule. I suspect it's more "defconfig=y is for stuff that makes most > platforms successfully boot without an initramfs". Yes, that's true, although there was already pushback against this. Having an initramfs is not a big deal and nowadays I think all new ARMv8 platforms use it. Anyway this talk here is about RTC which is not needed at all as built in. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel