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 A808B198E66; Thu, 27 Jun 2024 15:27:55 +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=1719502075; cv=none; b=uJEieeVUuzM3n/zyKcjMCIQRDJRLwed2BKGoSfddXyjiud3j7FTDZuSDEwZQO5BmWjLKdwmwuW3bM/4rLZhTu6+Rogu4dFcOaG0pnw8DA4hyibty6n7kv8v/uTle8NVLNsXFnH21sr4ifA3jVfqP5s4UiwL4oWg1XmBZLI6G2f4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719502075; c=relaxed/simple; bh=9cPgU3lKZ5sHDxRTQaP3BVTiignn+lYlySeU6Ux/fys=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XXp7/9lEzGjYe8Hm28maEsGajQtH1TwSt8jn1vibjtv9z/TvU0jtSX+JInrIbwBA2+Yrl5+kxmlGOzO0BSuWqji/jm0PSlOtwiPowsX3Bsln93NdfCQ2RUHPOsPB9iDO3PoB3Cksb/wrs2hlk/Aq3gbbZxJ3p62fDM7nQZNWLho= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DiLrGhdW; 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="DiLrGhdW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71DA8C2BBFC; Thu, 27 Jun 2024 15:27:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719502075; bh=9cPgU3lKZ5sHDxRTQaP3BVTiignn+lYlySeU6Ux/fys=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=DiLrGhdWBpmA3W1tjY7IIBB1Gg6aIbnJO0AzMMaDUklbi1yYhpui73U2buHSeePuE De4azC/U+G0f/w2z6h+SI8wlHf3m9DtRk+3rdOmLk4RW+pStAVkC+qAQKSghXVDCte VS6rfeGQswgi4zxj8FxOJ7oWojvz5qdQq76aB7WW49tL2lRlHnDE48qRNXasf7gnk8 EhtZ8yPP9XKFiZ79nu2NV8VDAE8G+jdrmvF58O46dzBfjhSr9OkrMZce29/ZczrvUI 6+BN8ml8JSWe9n4HSX9zP5tsJdfPCesQgO6SMkdqivZQWQglcKsIHbQ9SElUU8Pz9/ etKli/S9h+zLg== Message-ID: Date: Thu, 27 Jun 2024 17:27:49 +0200 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] pinctrl: samsung: Add support for pull-up and pull-down To: Vishnu Reddy , 'Krzysztof Kozlowski' , s.nawrocki@samsung.com, alim.akhtar@samsung.com, linus.walleij@linaro.org Cc: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, pankaj.dubey@samsung.com, ravi.patel@samsung.com, gost.dev@samsung.com References: <20240620103410.35786-1-vishnu.reddy@samsung.com> <38fae674-f672-46e0-a44e-1278deaaf36a@kernel.org> <07f201dac7be$e81317d0$b8394770$@samsung.com> <4efb51f3-4600-4d88-a5df-e7be43294d53@linaro.org> <086b01dac896$e988fed0$bc9afc70$@samsung.com> Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 27/06/2024 17:22, Krzysztof Kozlowski wrote: > On 27/06/2024 15:35, Vishnu Reddy wrote: >>> >>> I don't remember the code used here, but usually such choices are >>> determined by driver match data (and flags or value customized per variant). >> Hi, Thanks for suggestion. >> I have gone through this and found that driver match data in this driver is stored in the __initconst section, which is freed up after kernel initialization. So we have two options: >> 1: Keep this platform specific data in driver match data and then populate driver_data field in probe function. >> 2: Use compatible matching and set different values during set_config. >> >> First approach will result in many changes, such as populating driver match data for all platforms and then storing the same in driver_data in probe. >> >> In the second approach, we can handle this using simple if/else based on a compatible match. >> >> IMO, second approach would be simpler and introduce less changes. Any suggestions from your end? > > Please wrap your email according to mailing list style. > > Both options are not the way because you introduce a new, different > style of handling per-variant customization. The driver already parses > match data and stores such per-variant-details in different places, like > samsung_pin_bank or samsung_pinctrl_drv_data. This seems like a value > fixed per entire device, so could go to samsung_pinctrl_drv_data. ... although maybe this matches your first option? Not sure. Best regards, Krzysztof