From patchwork Thu Jul 2 11:20:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Ond=C5=99ej_Jirman?= X-Patchwork-Id: 11638563 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 528AB6C1 for ; Thu, 2 Jul 2020 11:22:22 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2C57B214D8 for ; Thu, 2 Jul 2020 11:22:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="h1F4fJ5C"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=megous.com header.i=@megous.com header.b="Nbj0ty8X" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C57B214D8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=megous.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=RqCOguedFtn2jjkBbcYcejw0pReHnR+MqxVZuGre1To=; b=h1F4fJ5CAMI2pmO6vWKepWIwD I8bq7NWzZ3eJx33mG+qU1unnF+ytIcLPYHakzET/IDTCkDNl4Mhg1/RLSrPxonOk2iSibK6nDfBP9 R7qRfm38p+ogsC61x8XJbsE6gmfmbXQs/kjFU/0jYTJFIQ9ADC7GNlZSsy4lOPUgQFBxWSECfpgbz Yz7eVZN8z5afRTwWmO3fyOPGJlso65SZoX8+rd9uxYXJAMDWX8liYWIwwFds1hbTTC/+9t8SlumVG 87ZTAePj4qJIVUsQV96a2whV7tdWa7lkc591OOiAQTA66zwM6vo+dRSHsyYfzyZ8lQHdtpvQP9vh6 PLaU2/77A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jqxH2-0001hD-GY; Thu, 02 Jul 2020 11:21:00 +0000 Received: from vps.xff.cz ([195.181.215.36]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jqxGs-0001cS-GE for linux-arm-kernel@lists.infradead.org; Thu, 02 Jul 2020 11:20:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megous.com; s=mail; t=1593688846; bh=OH0uafqw3wiAiFdr3Xq7r48sm5oT4+qFhajRJjz8lvE=; h=From:To:Cc:Subject:Date:References:From; b=Nbj0ty8XPOyIPBt+Yk3OnUCyp8Vhl4W9EOcurV0TFZyviKtjf76Lv14HmUxOY34U4 iyCtX5sr8gWGwYgYpzmtjYbFuAQk0RhRsOQFTjy2xiUZswkMLaQeGA+GAdclfBN+5s 0tmbcBzmcczTBAMIiXert+DF/+3/JuX/+Y4KR5Lc= From: Ondrej Jirman To: Dmitry Torokhov , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai Subject: [PATCH v3 2/4] input: gpio-vibra: Allow to use vcc-supply alone to control the vibrator Date: Thu, 2 Jul 2020 13:20:39 +0200 Message-Id: <20200702112041.1942707-3-megous@megous.com> In-Reply-To: <20200702112041.1942707-1-megous@megous.com> References: <20200702112041.1942707-1-megous@megous.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200702_072050_701172_C04B64B5 X-CRM114-Status: GOOD ( 11.11 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ondrej Jirman , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Luca Weiss , Tomas Novotny , linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Make enable-gpio optional to allow using this driver with boards that have vibrator connected to a power supply without intermediate gpio based enable circuitry. Also avoid a case where neither regulator nor enable gpio is specified, and bail out in probe in such a case. Signed-off-by: Ondrej Jirman --- drivers/input/misc/gpio-vibra.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/input/misc/gpio-vibra.c b/drivers/input/misc/gpio-vibra.c index f79f75595dd7..b3bb7e61ed1d 100644 --- a/drivers/input/misc/gpio-vibra.c +++ b/drivers/input/misc/gpio-vibra.c @@ -39,7 +39,7 @@ static int gpio_vibrator_start(struct gpio_vibrator *vibrator) struct device *pdev = vibrator->input->dev.parent; int err; - if (!vibrator->vcc_on) { + if (vibrator->vcc && !vibrator->vcc_on) { err = regulator_enable(vibrator->vcc); if (err) { dev_err(pdev, "failed to enable regulator: %d\n", err); @@ -57,7 +57,7 @@ static void gpio_vibrator_stop(struct gpio_vibrator *vibrator) { gpiod_set_value_cansleep(vibrator->gpio, 0); - if (vibrator->vcc_on) { + if (vibrator->vcc && vibrator->vcc_on) { regulator_disable(vibrator->vcc); vibrator->vcc_on = false; } @@ -112,7 +112,7 @@ static int gpio_vibrator_probe(struct platform_device *pdev) if (!vibrator->input) return -ENOMEM; - vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc"); + vibrator->vcc = devm_regulator_get_optional(&pdev->dev, "vcc"); err = PTR_ERR_OR_ZERO(vibrator->vcc); if (err) { if (err != -EPROBE_DEFER) @@ -121,7 +121,8 @@ static int gpio_vibrator_probe(struct platform_device *pdev) return err; } - vibrator->gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW); + vibrator->gpio = devm_gpiod_get_optional(&pdev->dev, "enable", + GPIOD_OUT_LOW); err = PTR_ERR_OR_ZERO(vibrator->gpio); if (err) { if (err != -EPROBE_DEFER) @@ -130,6 +131,11 @@ static int gpio_vibrator_probe(struct platform_device *pdev) return err; } + if (!vibrator->vcc && !vibrator->gpio) { + dev_err(&pdev->dev, "Neither gpio nor regulator provided\n"); + return -EINVAL; + } + INIT_WORK(&vibrator->play_work, gpio_vibrator_play_work); vibrator->input->name = "gpio-vibrator";