From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3259BCCF9E3 for ; Sun, 2 Nov 2025 12:45:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9FCXeGRB5nwxiHZNvSW8WJ8QeL6xegUsGs8BFEFXEO0=; b=qdwBkMj4slV5fwo8iaNmRYexHY O+Fs1lDVc2mco5bEqcf/ZUJV4TedmJOpsbHvHn2qlN/0Lh9UVD48Oc9XulOHVblwEMHWUFcuqCZcL FxH0UNJMfr5K68nzoQLEjvxv0I3uZwQuzFJRHFDE1VyADJkCyYETfiwzU+/TK7iXadzMusxWByDJ6 QxwlL+z/NqHT2thQMwucDj2djSbaWqT95rna8tvgfCxfbRwaVzNTXjN9kZarYfSF4rp8JV6RMRcSI CGr043YTUBnOne7giVA/WmIOGDrGT5XaEc9p7w5sKjldE07QEPiLwf9sozPxTi/fgqUg/KVfVh/dD c+SUxSuA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFXSU-00000008Xrj-3s8L; Sun, 02 Nov 2025 12:45:22 +0000 Received: from zeus03.de ([194.117.254.33] helo=mail.zeus03.de) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFXSQ-00000008XrG-2unc for linux-mediatek@lists.infradead.org; Sun, 02 Nov 2025 12:45:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to; s=k1; bh=9FCX eGRB5nwxiHZNvSW8WJ8QeL6xegUsGs8BFEFXEO0=; b=Ve76RgEcDwnLKktwUX3T OAtGPvhlFVyJXHg0cgbwe2S/D7souSPU13JEXuh1fSZ+i1uZoTNF/a+Y5iKbgAQW Z28MghY0ND5OnVxsdJgu3WNhdzt/QrJkd+sYz1bAdfpEmoGa0K55hSLpuUSC7+xc TTM6IIYbfumIjbsWTfpFS5q2e9WuQ7o/7O41C7cbgSKrL6ScXXHHTy39pDwCdzUL 3aF4NaMRWPJi1WH468ktyV6v/cUMDdppEpDxBfEgn4EBOmfMRxDeRb4TDMfEYRjm jmW/ydifulRLB5MjU4+ecRha0OKb+64iT+8cCuPhanSxnkT1M1BUPt/s6wLGYqEn 0w== Received: (qmail 1814717 invoked from network); 2 Nov 2025 13:45:10 +0100 Received: by mail.zeus03.de with UTF8SMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 2 Nov 2025 13:45:10 +0100 X-UD-Smtp-Session: l3s3148p1@BTge+JtC/NAujnv0 Date: Sun, 2 Nov 2025 13:45:09 +0100 From: Wolfram Sang To: "Frank Wunderlich (linux)" Cc: angelogioacchino.delregno@collabora.com, matthias.bgg@kernel.org, Andi Shyti , Qii Wang , Wojciech Siudy , linux-mediatek@lists.infradead.org, linux-i2c@vger.kernel.org, daniel@makrotopia.org Subject: Re: i2c issues in 6.18 on R4, but not r4pro (both mt7988 with i2c-mux on i2c2) Message-ID: References: <3f5ef2d1336933a87d9761b5ff510a1f@fw-web.de> <64fb54d5f2bc929720d3313f7fa2d8cd@fw-web.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <64fb54d5f2bc929720d3313f7fa2d8cd@fw-web.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251102_044520_241072_E12351B7 X-CRM114-Status: UNSURE ( 7.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org > > I'm sure that i had tested with them already reverted, but maybe powercycle > was not complete. > Git bisect pointed also to "i2c: muxes: pca954x: Use reset controller only". Can you try enabling CONFIG_RESET_GPIO please? It is probably that this driver is missing. The core relies on that driver for the fallback the above patch makes use of. Sadly, I couldn't convince the reset maintainers of a way to automatically select the driver for existing users :(