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 654264683 for ; Fri, 31 Jan 2025 07:18:03 +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=1738307883; cv=none; b=fJO9Wodro+xWeQHuxvtmC00YTHIu3vMLKxB8SNs3WUp17tdW/5tWrcy0w97eMlQSeMEfeCl+QWkuj/yqG0c1pNZ/v2gjdnbFPWeHzJGgcAyHmJcu+YUZLWoNkDMf93wvJVoO5S5120FWuoxQr0anE0eAR4Yr+79TYVp1EhcXp/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738307883; c=relaxed/simple; bh=/IQt9+vWizm8EPvXQSgkn1Iw+V/IqBg/ycGllj3xkTs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=qxVHEs3k/Bt9P60N31QxhhqwHj1SD3KDONxUGZKqDLQ7CvSIglGghz7s48zSu9eyX/LUOtBKnpJ3zrgUbpFD5NMcVL1v8VSXGE4f9vHebA5CyNNUqZTnJnnjZKPDLPk4u8xxOg6pvuWdrkXBzGtidI/tUT31EckgtujolVkEjQs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CiXeLyx3; 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="CiXeLyx3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFD63C4CED1; Fri, 31 Jan 2025 07:18:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738307882; bh=/IQt9+vWizm8EPvXQSgkn1Iw+V/IqBg/ycGllj3xkTs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CiXeLyx3bEL7hjfAOkOxhDjgNTmXODSIbBo1ZEJWBPMEpdxgj0SinBTTI1XsWcKVG GyrYir+zbUPOcoqGr9kQL9spl37qKTETHvXV/rsOSc0+au+9nqMeWslyOhlEEVkzgw ILtuXJpAB32yI6aorTPkPCQ5/u8t+K/SApSA6Qqdn6XfYp2BHpWP3hsX8zAUHVSxdd n24icryA8VyUYxGgWzFp/fIvez//tHB/6R2jdIbalMKaQhe1CPaSFWtbFRca4uTBo6 t+hU9YymnUgDwimQk/i8nawoH8EhqLLkypC4x4ZtL5ebQ54FMX4T5XUpL+7MtwZE6p SuLE7rdaHD5IQ== Message-ID: Date: Fri, 31 Jan 2025 08:17:58 +0100 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] reset: gpio: Add self-deasserting reset callback To: Shenwei Wang , Philipp Zabel Cc: imx@lists.linux.dev, linux-imx@nxp.com References: <20250130215306.60589-1-shenwei.wang@nxp.com> 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: <20250130215306.60589-1-shenwei.wang@nxp.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 30/01/2025 22:53, Shenwei Wang wrote: > During the driver probe phase, many drivers leverage convenience > wrapper APIs such as device_reset and device_reset_optional provided > by the reset core driver. However, both of these APIs depend on the > presence of a .reset callback within the reset controller's operations > structure. > > Introducing the self-deasserting reset callback enhances flexibility for > users and enables a more simple reset process during device initialization. The reset callback was not added on purpose and you totally ignored the reasons here. See below. > > Signed-off-by: Shenwei Wang > --- > drivers/reset/reset-gpio.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/reset/reset-gpio.c b/drivers/reset/reset-gpio.c > index 2290b25b6703..614f9e261a13 100644 > --- a/drivers/reset/reset-gpio.c > +++ b/drivers/reset/reset-gpio.c > @@ -1,5 +1,6 @@ > // SPDX-License-Identifier: GPL-2.0 > > +#include > #include > #include > #include > @@ -37,6 +38,17 @@ static int reset_gpio_deassert(struct reset_controller_dev *rc, > return 0; > } > > +static int reset_gpio_reset(struct reset_controller_dev *rc, unsigned long id) > +{ > + struct reset_gpio_priv *priv = rc_to_reset_gpio(rc); > + > + gpiod_set_value_cansleep(priv->reset, 1); > + usleep_range(10, 20); No, because this is some arbitrary value which might or might not work. If this gets accepted, next person will change it to their own need. Then next person will revert previous change... and so on. Best regards, Krzysztof