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 7F04B1591F0; Thu, 27 Jun 2024 15:22:33 +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=1719501753; cv=none; b=aUA6JF6Qu1CJs7hbf7r14pmaL+baOMP6gXi8tf0WydMY4mkj98BA3oWH9ATZKPW+Vpm6gWyQoFIJtsUswhvhct4MXke3lzjswbZHvSJSMGnQxE8LJxZ+GSJAm8h5SOKJFExYOvev2e65WM7R5IxMwvjIpuSKGs4mStq0QQO9sqg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719501753; c=relaxed/simple; bh=dzYnLX0ofV348/ikNHktNilDa/Whpr7p2KqpvFijEkA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jJqr9+GSYwI87u85MC30mrJpSEuAYHpUToYBKIhrb4PAPpXTe15M/anU4ymRyryzZWKvpP4Ufz42w08Tf3d85Yt76Al/dbtDtRwz7VydM1V+5E+nfQVNTriqRQoeGP4HmbqAGbze5WATVnkn3Y0ihgaHJOExqjo1C6SjjnntaTE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cjbVpYgq; 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="cjbVpYgq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2093C2BBFC; Thu, 27 Jun 2024 15:22:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719501753; bh=dzYnLX0ofV348/ikNHktNilDa/Whpr7p2KqpvFijEkA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=cjbVpYgqgIXYJnCEvdeaZCCwJAARjGbN5gPemtbhVjxZMSSMTaqprKACo7c2nnLQs HFHdlpgZfHucfrrvV5es81uasb82gSvbeRxl1DwecrjZ3RkoFdQ4LTQRoSiOMLhdY0 nUk7uFJ/ufGzGl/MXfvqf3LfdfR8sYcY86c6rPUaA08PI4CpqgMsGd5hU1LhKpJIqk NA691Rym2+GwaEi1PQ6N7WjcU4grUIaf/5g9XdS4w4mIuBWV48J6nL+BnLE+DzYQ9u HgnAwqTdt5GxXHDV7bxKJ20UmUauLvvIl+lauMDufsJWFXj7aLQhUI1sSPN1PKIkIG kG/AUoXair8Nw== Message-ID: Date: Thu, 27 Jun 2024 17:22:27 +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> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit 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. Best regards, Krzysztof