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Mon, 26 May 2025 08:44:41 +0200 Message-ID: Date: Mon, 26 May 2025 08:44:36 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] arm64: dts: freescale: imx93-phycore-som: Delay the phy reset by a gpio To: Andrew Lunn , Christoph Stoidner Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, upstream@lists.phytec.de References: <20250524112315.695376-1-c.stoidner@phytec.de> <047c963e-f24d-4995-aea0-4a8cf8e343f5@lunn.ch> Content-Language: en-US From: Stefan Wahren Autocrypt: addr=wahrenst@gmx.net; keydata= xjMEZ1dOJBYJKwYBBAHaRw8BAQdA7H2MMG3q8FV7kAPko5vOAeaa4UA1I0hMgga1j5iYTTvN IFN0ZWZhbiBXYWhyZW4gPHdhaHJlbnN0QGdteC5uZXQ+wo8EExYIADcWIQT3FXg+ApsOhPDN NNFuwvLLwiAwigUCZ1dOJAUJB4TOAAIbAwQLCQgHBRUICQoLBRYCAwEAAAoJEG7C8svCIDCK JQ4BAP4Y9uuHAxbAhHSQf6UZ+hl5BDznsZVBJvH8cZe2dSZ6AQCNgoc1Lxw1tvPscuC1Jd1C TZomrGfQI47OiiJ3vGktBc44BGdXTiQSCisGAQQBl1UBBQEBB0B5M0B2E2XxySUQhU6emMYx f5QR/BrEK0hs3bLT6Hb9WgMBCAfCfgQYFggAJhYhBPcVeD4Cmw6E8M000W7C8svCIDCKBQJn V04kBQkHhM4AAhsMAAoJEG7C8svCIDCKJxoA/i+kqD5bphZEucrJHw77ujnOQbiKY2rLb0pE aHMQoiECAQDVbj827W1Yai/0XEABIr8Ci6a+/qZ8Vz6MZzL5GJosAA== In-Reply-To: <047c963e-f24d-4995-aea0-4a8cf8e343f5@lunn.ch> Content-Type: text/plain; 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>> reg =3D <1>; >> + reset-gpios =3D <&gpio4 23 GPIO_ACTIVE_HIGH>; >> + reset-assert-us =3D <30>; > Is there anything in the datasheet about needing a delay after the > reset? There is a DT property for this: > > reset-deassert-us: > description: > Delay after the reset was deasserted in microseconds. If > this property is missing the delay will be skipped. is it the time until the PHY finished its post reset stabilization=20 (datasheet to call it T2 "reset to SMI ready")? > > Anyway: > > Reviewed-by: Andrew Lunn > > Andrew >