From patchwork Thu Dec 13 15:14:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 10728887 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 40FEB91E for ; Thu, 13 Dec 2018 15:15:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3154528742 for ; Thu, 13 Dec 2018 15:15:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 25B912C45E; Thu, 13 Dec 2018 15:15:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BCDA928742 for ; Thu, 13 Dec 2018 15:15:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729429AbeLMPPJ (ORCPT ); Thu, 13 Dec 2018 10:15:09 -0500 Received: from mail-out.m-online.net ([212.18.0.10]:38809 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728591AbeLMPPJ (ORCPT ); Thu, 13 Dec 2018 10:15:09 -0500 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 43Fy0W3Qyqz1qxfb; Thu, 13 Dec 2018 16:15:07 +0100 (CET) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 43Fy0W31gbz1qtfM; Thu, 13 Dec 2018 16:15:07 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id A5mSOY6dD2S4; Thu, 13 Dec 2018 16:15:05 +0100 (CET) X-Auth-Info: wrRLzLV4Sw/1ttUn4jP5ZP23ikqQrVq+czRwRxxhLh0= Received: from kurokawa.lan (ip-86-49-110-70.net.upcbroadband.cz [86.49.110.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Thu, 13 Dec 2018 16:15:05 +0100 (CET) From: Marek Vasut To: linux-input@vger.kernel.org Cc: Marek Vasut , Dmitry Torokhov , Henrik Rydberg , Olivier Sobrie Subject: [PATCH 4/8] input: touchscreen: ili210x: Add reset GPIO support Date: Thu, 13 Dec 2018 16:14:38 +0100 Message-Id: <20181213151442.27854-5-marex@denx.de> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20181213151442.27854-1-marex@denx.de> References: <20181213151442.27854-1-marex@denx.de> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The touchscreen can have a reset GPIO connected to it, add support for such an arrangement. Signed-off-by: Marek Vasut Cc: Dmitry Torokhov Cc: Henrik Rydberg Cc: Olivier Sobrie To: linux-input@vger.kernel.org --- drivers/input/touchscreen/ili210x.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c index 1102ee560bf4d..7579cf16b3663 100644 --- a/drivers/input/touchscreen/ili210x.c +++ b/drivers/input/touchscreen/ili210x.c @@ -5,6 +5,7 @@ #include #include #include +#include #define MAX_TOUCHES 2 #define DEFAULT_POLL_PERIOD 20 @@ -42,6 +43,7 @@ struct firmware_version { struct ili210x { struct i2c_client *client; struct input_dev *input; + struct gpio_desc *reset_gpio; }; static int ili210x_read_reg(struct i2c_client *client, u8 reg, void *buf, @@ -158,6 +160,7 @@ static int ili210x_i2c_probe(struct i2c_client *client, { struct device *dev = &client->dev; struct ili210x *priv; + struct gpio_desc *reset_gpio; struct input_dev *input; struct panel_info panel; struct firmware_version firmware; @@ -171,6 +174,17 @@ static int ili210x_i2c_probe(struct i2c_client *client, return -EINVAL; } + reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset_gpio)) + return PTR_ERR(reset_gpio); + + if (reset_gpio) { + gpiod_set_value_cansleep(reset_gpio, 1); + usleep_range(50, 100); + gpiod_set_value_cansleep(reset_gpio, 0); + mdelay(100); + } + /* Get firmware version */ error = ili210x_read_reg(client, REG_FIRMWARE_VERSION, &firmware, sizeof(firmware)); @@ -198,6 +212,7 @@ static int ili210x_i2c_probe(struct i2c_client *client, priv->client = client; priv->input = input; + priv->reset_gpio = reset_gpio; /* Setup input device */ input->name = "ILI210x Touchscreen"; @@ -256,8 +271,12 @@ static int ili210x_i2c_probe(struct i2c_client *client, static int ili210x_i2c_remove(struct i2c_client *client) { + struct ili210x *priv = i2c_get_clientdata(client); + sysfs_remove_group(&client->dev.kobj, &ili210x_attr_group); input_unregister_device(priv->input); + if (priv->reset_gpio) + gpiod_set_value_cansleep(priv->reset_gpio, 1); return 0; }