From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C7B97243392; Sun, 9 Feb 2025 12:01:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739102484; cv=none; b=Vd+I/DaB77gUdeXOCQIRwsW/WCdFTpipOt3Ro5pjIj9yI/V6NQ9x7sD/Nk3cggtwHO73DUdnsndmo/7Ext4+dTVh2uiDY4uRCNuYrWpmLJ0HIG5j36yyvTwsfGO/z7F5FEnoZtmEF8SkHYg6Ki05GNruiw4FQGnskIQ3INM3Y1s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739102484; c=relaxed/simple; bh=YOlF0kfEhFPlEFqyngV+aVrsjWHQHhzJ3hb7R1wmWaY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=q6ma026IbOIHRpNzMhoejd71U2UQ4a7ihrBSnY+c381EMt99KpOU39diGM8hMd0wgbYfXRB9YMAFoZ/FcWXj8ZRmEfIMEArQL0pV3rH/bwfgsi8gZYAXn24J2ooIHu7S7Mhztn4k/SkBoWiksW4uUz+eg4f70CUziM8r5wpXoRI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DI0fLVPn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DI0fLVPn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BE53C4CEE2; Sun, 9 Feb 2025 12:01:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739102484; bh=YOlF0kfEhFPlEFqyngV+aVrsjWHQHhzJ3hb7R1wmWaY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=DI0fLVPnHzCLzO/qyU7oeSgqlxDU/UEQdIgw+LaJ3hX/9EKWQPWn9d2gmA+dsV74h JAglg5KC/qvKWcAskeAB6dGq8y6qZjxVPVPIBjdqL1rZzvxw2w304+5MSSoVoHeLhK SYjO/5Z7zyvQMCVfYKW6ae51S0M1oB9yfydfXHn1ebhF2GjV5SwRRvzoNHplPNFNBu zxxUSpNpmiFut6/uheoxm8HzhSX47Bgvn7qPSzmItuc5xPwbrbAkoY6Xv7DD5JBofE WzOi5zk2dP68aOEAQXTy6u05EUYmFnv3D31uAc1AfulbXHrHmb4FD5PTC2/BEzjegA V0tCGga0bNHQg== Message-ID: <5d2b71a9-a62b-418c-91ae-fa2a195aa27c@kernel.org> Date: Sun, 9 Feb 2025 13:01:18 +0100 Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: trivial-devices: add lt3074 To: "Encarnacion, Cedric justine" Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jean Delvare , Guenter Roeck , Jonathan Corbet , Delphine CC Chiu , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-hwmon@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-i2c@vger.kernel.org" References: <20250124-upstream-lt3074-v1-0-7603f346433e@analog.com> <20250124-upstream-lt3074-v1-1-7603f346433e@analog.com> <20250127-outgoing-ibis-of-respect-028c50@krzk-bin> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzSVLcnp5c3p0b2Yg S296bG93c2tpIDxrcnprQGtlcm5lbC5vcmc+wsGVBBMBCgA/AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJgPO8PBQkUX63hAAoJEBuTQ307 QWKbBn8P+QFxwl7pDsAKR1InemMAmuykCHl+XgC0LDqrsWhAH5TYeTVXGSyDsuZjHvj+FRP+ gZaEIYSw2Yf0e91U9HXo3RYhEwSmxUQ4Fjhc9qAwGKVPQf6YuQ5yy6pzI8brcKmHHOGrB3tP /MODPt81M1zpograAC2WTDzkICfHKj8LpXp45PylD99J9q0Y+gb04CG5/wXs+1hJy/dz0tYy iua4nCuSRbxnSHKBS5vvjosWWjWQXsRKd+zzXp6kfRHHpzJkhRwF6ArXi4XnQ+REnoTfM5Fk VmVmSQ3yFKKePEzoIriT1b2sXO0g5QXOAvFqB65LZjXG9jGJoVG6ZJrUV1MVK8vamKoVbUEe 0NlLl/tX96HLowHHoKhxEsbFzGzKiFLh7hyboTpy2whdonkDxpnv/H8wE9M3VW/fPgnL2nPe xaBLqyHxy9hA9JrZvxg3IQ61x7rtBWBUQPmEaK0azW+l3ysiNpBhISkZrsW3ZUdknWu87nh6 eTB7mR7xBcVxnomxWwJI4B0wuMwCPdgbV6YDUKCuSgRMUEiVry10xd9KLypR9Vfyn1AhROrq AubRPVeJBf9zR5UW1trJNfwVt3XmbHX50HCcHdEdCKiT9O+FiEcahIaWh9lihvO0ci0TtVGZ MCEtaCE80Q3Ma9RdHYB3uVF930jwquplFLNF+IBCn5JRzsFNBFVDXDQBEADNkrQYSREUL4D3 Gws46JEoZ9HEQOKtkrwjrzlw/tCmqVzERRPvz2Xg8n7+HRCrgqnodIYoUh5WsU84N03KlLue MNsWLJBvBaubYN4JuJIdRr4dS4oyF1/fQAQPHh8Thpiz0SAZFx6iWKB7Qrz3OrGCjTPcW6ei OMheesVS5hxietSmlin+SilmIAPZHx7n242u6kdHOh+/SyLImKn/dh9RzatVpUKbv34eP1wA GldWsRxbf3WP9pFNObSzI/Bo3kA89Xx2rO2roC+Gq4LeHvo7ptzcLcrqaHUAcZ3CgFG88CnA 6z6lBZn0WyewEcPOPdcUB2Q7D/NiUY+HDiV99rAYPJztjeTrBSTnHeSBPb+qn5ZZGQwIdUW9 YegxWKvXXHTwB5eMzo/RB6vffwqcnHDoe0q7VgzRRZJwpi6aMIXLfeWZ5Wrwaw2zldFuO4Dt 91pFzBSOIpeMtfgb/Pfe/a1WJ/GgaIRIBE+NUqckM+3zJHGmVPqJP/h2Iwv6nw8U+7Yyl6gU BLHFTg2hYnLFJI4Xjg+AX1hHFVKmvl3VBHIsBv0oDcsQWXqY+NaFahT0lRPjYtrTa1v3tem/ JoFzZ4B0p27K+qQCF2R96hVvuEyjzBmdq2esyE6zIqftdo4MOJho8uctOiWbwNNq2U9pPWmu 4vXVFBYIGmpyNPYzRm0QPwARAQABwsF8BBgBCgAmAhsMFiEEm9B+DgxR+NWWd7dUG5NDfTtB YpsFAmA872oFCRRflLYACgkQG5NDfTtBYpvScw/9GrqBrVLuJoJ52qBBKUBDo4E+5fU1bjt0 Gv0nh/hNJuecuRY6aemU6HOPNc2t8QHMSvwbSF+Vp9ZkOvrM36yUOufctoqON+wXrliEY0J4 ksR89ZILRRAold9Mh0YDqEJc1HmuxYLJ7lnbLYH1oui8bLbMBM8S2Uo9RKqV2GROLi44enVt vdrDvo+CxKj2K+d4cleCNiz5qbTxPUW/cgkwG0lJc4I4sso7l4XMDKn95c7JtNsuzqKvhEVS oic5by3fbUnuI0cemeizF4QdtX2uQxrP7RwHFBd+YUia7zCcz0//rv6FZmAxWZGy5arNl6Vm lQqNo7/Poh8WWfRS+xegBxc6hBXahpyUKphAKYkah+m+I0QToCfnGKnPqyYIMDEHCS/RfqA5 t8F+O56+oyLBAeWX7XcmyM6TGeVfb+OZVMJnZzK0s2VYAuI0Rl87FBFYgULdgqKV7R7WHzwD uZwJCLykjad45hsWcOGk3OcaAGQS6NDlfhM6O9aYNwGL6tGt/6BkRikNOs7VDEa4/HlbaSJo 7FgndGw1kWmkeL6oQh7wBvYll2buKod4qYntmNKEicoHGU+x91Gcan8mCoqhJkbqrL7+nXG2 5Q/GS5M9RFWS+nYyJh+c3OcfKqVcZQNANItt7+ULzdNJuhvTRRdC3g9hmCEuNSr+CLMdnRBY fv0= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 06/02/2025 10:05, Encarnacion, Cedric justine wrote: >> -----Original Message----- >> From: Krzysztof Kozlowski >> Sent: Monday, January 27, 2025 3:52 PM >> To: Encarnacion, Cedric justine >> Cc: Rob Herring ; Krzysztof Kozlowski ; >> Conor Dooley ; Jean Delvare ; >> Guenter Roeck ; Jonathan Corbet ; >> Delphine CC Chiu ; >> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux- >> hwmon@vger.kernel.org; linux-doc@vger.kernel.org; linux-i2c@vger.kernel.org >> Subject: Re: [PATCH 1/2] dt-bindings: trivial-devices: add lt3074 >> >> [External] >> >> On Fri, Jan 24, 2025 at 11:39:06PM +0800, Cedric Encarnacion wrote: >>> Add Analog Devices LT3074 Ultralow Noise, High PSRR Dropout Linear >>> Regulator. >> >> Regulator? Then why is it trivial? No enable-gpios? No I2C interface? >> >> Best regards, >> Krzysztof > > I based this driver primarily on the LT7182S dual-channel silent switcher > regulator. I do not understand why the base of driver matters here? If it was based on LTFOOBARGROUNDHOG1 would it change something? I know neither LT7182S nor the LTFOOBARGROUNDHOG1. And driver matters here even less - bindings are about hardware, not given implementation in OS. > The LT3074 is a single-channel device with basic enable and > power-good GPIOs, fewer registers, and fewer functionalities than the So it has GPIOs? And by GPIOs you mean what the SoC/CPU, thus the operating system, sees as GPIOs or something else? > LT7182S. Like other PMBus drivers, its GPIOs are not exposed. > > Here are other PMBus regulators/power modules found in trivial-devices > I also used as reference: > > - infineon,irps5401 > - delta,q54sj108a2 I don't know these devices so still no clue. Please rather explain in the terms of the hardware, e.g. what this device has or has not. See also regulator bindings. Best regards, Krzysztof