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 6A31819343B; Mon, 9 Dec 2024 19:50:13 +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=1733773813; cv=none; b=rN73U0AHEL73+Se+pRUgQCOqATR68iRe/NDaP8LF9oc9WS0DVDg0ywt3Y06HZDZC/GVwuGdKAbc2D97z0IMpYp7lqn/9PGYqUQlPTxKRVeMOBebWkoayNZFsHpxLjgDhGFxNexd3SdvR+LDxm0WEE4/Hn+5HTiAoS9cR3LomMMc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733773813; c=relaxed/simple; bh=WFyzCPUIdQEg7do8gqzOuZUa8ipE3gSeX/hK+rkfFkg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=iInDl4NJhJEdaqOY53FWFiz9Q08WtTLn9qn+y3r+gjqaIdBS1YcrpnVFhdrDQQa+U1HyXkaLRt1iFmiaeuLdztBzoU6d1RVk19CaorkPWWngLhJkdS65Bvus10whm/4TouVeREfPyGvDYeTI9FNvb9TY4CoLsTXB2uM3BbIxfwQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QN+hx12R; 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="QN+hx12R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 940D0C4CED1; Mon, 9 Dec 2024 19:50:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733773812; bh=WFyzCPUIdQEg7do8gqzOuZUa8ipE3gSeX/hK+rkfFkg=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=QN+hx12RIQYDWCp3wPjsJwArcAmy8s1Q6y2UfLvZdvZADOEaY3DVg86cA5uC7m2bV DlSJoCfS+i75RrTOr8nMu1lVdMHV4jp4ASPM7+ePN8sCz1UJOKtXN8ZhTBC53MNZqj S3Gx/sMTPFXpCvCLRRrr2/jfuUIQcdiMJ9bU1Hr02xPyJymPyvDR1ZV6rCou/UJDS+ sNVsDiTo6PzyEnasklpxgqwpEHhfl798ad0QGee7KsLuv7fEymFQmNcZcU2m0B2w0w C2jZ6I3NZEAz+IZT4xfj07A3VnUEb5ZXy910CsI3eLo124/4w0qmkI0sGue80Z2cqi ji0qSlyBKDoig== Message-ID: Date: Mon, 9 Dec 2024 20:50:07 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] regulator:s5m8767 Fully convert to GPIO descriptors To: Song Chen , lgirdwood@gmail.com, broonie@kernel.org, lee@kernel.org, linus.walleij@linaro.org, brgl@bgdev.pl Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-samsung-soc@vger.kernel.org References: <20241206051358.496832-1-chensong_2000@189.cn> <17a4dbd7-56cb-4c20-a913-0df5c39fc3ff@kernel.org> <862662aa-c5a2-4e15-b97f-ca1b4757ab25@189.cn> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 07/12/2024 07:16, Song Chen wrote: >>> } >>> - pdata->buck_gpios[i] = gpio; >>> + >>> + /* SET GPIO*/ >> >> What is a SET GPIO? >> >>> + snprintf(label, sizeof(label), "%s%d", "S5M8767 SET", i + 1); >> >> Why using "SET" as name, not the actual name it is used for? Buck DVS? > > from below snippets: > s5m8767_pmic_probe of drivers/regulator/s5m8767.c > ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0], > "S5M8767 SET1"); > if (ret) > return ret; > > ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], > "S5M8767 SET2"); > if (ret) > return ret; > > ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2], > "S5M8767 SET3"); Yeah, your code is fine. > > and arch/arm/boot/dts/samsung/exynos5250-spring.dts > > s5m8767,pmic-buck-dvs-gpios = <&gpd1 0 GPIO_ACTIVE_LOW>, /* DVS1 */ > <&gpd1 1 GPIO_ACTIVE_LOW>, /* DVS2 */ > <&gpd1 2 GPIO_ACTIVE_LOW>; /* DVS3 */ > > s5m8767,pmic-buck-ds-gpios = <&gpx2 3 GPIO_ACTIVE_LOW>, /* SET1 */ > <&gpx2 4 GPIO_ACTIVE_LOW>, /* SET2 */ > <&gpx2 5 GPIO_ACTIVE_LOW>; /* SET3 */ > >> >>> + gpiod_set_consumer_name(pdata->buck_gpios[i], label); >>> + gpiod_direction_output(pdata->buck_gpios[i], >>> + (pdata->buck_default_idx >> (2 - i)) & 0x1); >> >> This is not an equivalent code. You set values for GPIOs 0-1 even if >> requesting GPIO 2 fails. >> >> On which board did you test it? > > You are right ,it's not equivalent with original code, i will fix it. > but i have a question here: > > ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0], > "S5M8767 SET1"); > if (ret) > return ret; > > ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1], > "S5M8767 SET2"); > if (ret) > return ret; > > ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2], > "S5M8767 SET3"); > if (ret) > return ret; > > if it fails to request buck_gpios[2] after successfully requests > buck_gpios[0] and buck_gpios[1], the probe fails as well, should it call > gpiod_put to return gpio resource? Aren't you using devm interface? Please read the API. You do not need to put anything, unless you use some other interface and I missed the point of the question. Best regards, Krzysztof