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[81.240.10.146]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-438904625f5sm64954515e9.28.2025.01.18.02.22.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jan 2025 02:22:30 -0800 (PST) From: Philippe Simons To: Vinod Koul , Kishon Vijay Abraham I , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Philippe Simons , linux-phy@lists.infradead.org (open list:GENERIC PHY FRAMEWORK), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Allwinner sunXi SoC support), linux-sunxi@lists.linux.dev (open list:ARM/Allwinner sunXi SoC support), linux-kernel@vger.kernel.org (open list) Subject: [RFC PATCH 2/3] phy: override dr_mode for phy0 Date: Sat, 18 Jan 2025 11:22:05 +0100 Message-ID: <20250118102207.9339-2-simons.philippe@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250118102207.9339-1-simons.philippe@gmail.com> References: <20250118102207.9339-1-simons.philippe@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit PHY0 mode is fully determined by the selected mux route. Ignore changes requests from controllers. Signed-off-by: Philippe Simons --- drivers/phy/allwinner/phy-sun4i-usb.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c index 24fbabe7a..f163b355e 100644 --- a/drivers/phy/allwinner/phy-sun4i-usb.c +++ b/drivers/phy/allwinner/phy-sun4i-usb.c @@ -544,6 +544,18 @@ static int sun4i_usb_phy_set_mode(struct phy *_phy, return -EINVAL; } + if (data->cfg->phy0_dual_route) { + /* + For SoCs with dual route the PHY mode is fully determined by + the selected mux route (i.e. USB controller to use). + As both host (EHCI/OHCI) and peripheral (MUSB) controllers uses + the same PHY, both drivers can try to set PHY mode. + We need to ignore this requests, but not report error in case + of valid mode values. + */ + return 0; + } + if (new_mode != data->dr_mode) { dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode); data->dr_mode = new_mode; -- 2.47.1