From patchwork Thu Jul 30 13:24:44 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: 11693031 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 EB9756C1 for ; Thu, 30 Jul 2020 13:25:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CBD9C22B42 for ; Thu, 30 Jul 2020 13:25:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=megous.com header.i=@megous.com header.b="t06Dc9u5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729017AbgG3NYv (ORCPT ); Thu, 30 Jul 2020 09:24:51 -0400 Received: from vps.xff.cz ([195.181.215.36]:54988 "EHLO vps.xff.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728760AbgG3NYv (ORCPT ); Thu, 30 Jul 2020 09:24:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megous.com; s=mail; t=1596115489; bh=z0TyS2KjMxaB3mAxoJny4kSRkgxtN+e0hcvKu1IAJzY=; h=From:To:Cc:Subject:Date:References:From; b=t06Dc9u58MmLXeHH549DDineJPBx7yQrsTBnjwrgH1NrCO1cbOcFa2KMlCQOmHo1/ lu3bYlfcdsHWeSiqgfnU41T9sD117Ai3zVOf+7HSmtjIT1lw0zadas0mAYVlcbCbTY pRjwkwy3ohud/9+d8SYZZWlQLycDMzCcRp5rofzw= From: Ondrej Jirman To: Dmitry Torokhov , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai Cc: Ondrej Jirman , Luca Weiss , Tomas Novotny , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 2/4] input: gpio-vibra: Allow to use vcc-supply alone to control the vibrator Date: Thu, 30 Jul 2020 15:24:44 +0200 Message-Id: <20200730132446.3139980-3-megous@megous.com> In-Reply-To: <20200730132446.3139980-1-megous@megous.com> References: <20200730132446.3139980-1-megous@megous.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.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 | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/input/misc/gpio-vibra.c b/drivers/input/misc/gpio-vibra.c index f79f75595dd7..87508c3939e9 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; } @@ -112,16 +112,19 @@ 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 == -ENODEV) { + vibrator->vcc = NULL; + } else if (err) { if (err != -EPROBE_DEFER) dev_err(&pdev->dev, "Failed to request regulator: %d\n", err); 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 +133,11 @@ 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";