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Mon, 17 Aug 2026 09:45:30 -0700 (PDT) Received: from linaro.org ([2a02:2454:ff24:7210:7281:1989:ca4f:c9c9]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49987b3a6ddsm5069295e9.1.2026.08.17.09.45.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2026 09:45:30 -0700 (PDT) Date: Mon, 17 Aug 2026 18:45:28 +0200 From: Stephan Gerhold To: Linus Walleij Cc: u-boot@lists.u-boot-project.org, Tom Rini , Stefan Hansson Subject: Re: [PATCH v2 7/8] arm: u8500: Switch Stemmy to upstream Janice device tree Message-ID: References: <20260817-ux500-external-sdcard-v2-0-ca9a110bd9c6@kernel.org> <20260817-ux500-external-sdcard-v2-7-ca9a110bd9c6@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260817-ux500-external-sdcard-v2-7-ca9a110bd9c6@kernel.org> X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.u-boot-project.org On Mon, Aug 17, 2026 at 11:31:56AM +0200, Linus Walleij wrote: > Use the upstream Samsung Janice device tree as the initial target for > the Stemmy configuration. This also prepares the board to share the > upstream Ux500 Samsung device trees with Linux. > > U-Boot does not yet implement the U8500 clock providers used by the > upstream device tree. Add a U-Boot-specific overlay with the known MTU > clock rate and a fixed input clock for the external SD controller. > > Signed-off-by: Linus Walleij Hm okay so you're basically dropping support for the internal eMMC in this patch? Can we support both? BOOTSTD should be able to scan multiple storages for boot targets. I'm also not really sure about selecting Janice as "default" device tree here. Do you expect users to change this setting when they want to build stemmy for another board? I wonder if we could continue using a single generic binary for all boards using CONFIG_MULTI_DTB_FIT. We should have "fw_mach" in board/ste/stemmy/stemmy.c that should tell us which device we are running on, which seems to be mostly(?) unique: https://github.com/stericsson-mainline/android_kernel/blob/9508895090960012f916561b2ede5eaf8124fabd/arch/arm/tools/mach-types#L3956-L3965 I'm not sure about codina-tmo, you would need to check which number the bootloader passes. If these numbers are unique, it should be easy to implement board_fit_config_name_match(). Thanks, Stephan