From patchwork Tue May 19 18:24:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Reichel X-Patchwork-Id: 11558489 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 974B060D for ; Tue, 19 May 2020 18:25:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AB20207C4 for ; Tue, 19 May 2020 18:25:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729512AbgESSZM (ORCPT ); Tue, 19 May 2020 14:25:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729488AbgESSZI (ORCPT ); Tue, 19 May 2020 14:25:08 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3728C08C5C1; Tue, 19 May 2020 11:25:07 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: sre) with ESMTPSA id E54B62A268F Received: by jupiter.universe (Postfix, from userid 1000) id A2E294800FF; Tue, 19 May 2020 20:25:01 +0200 (CEST) From: Sebastian Reichel To: Dmitry Torokhov , Ahmet Inan , Martin Fuzzey Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@collabora.com, Sebastian Reichel Subject: [PATCHv2 5/5] Input: EXC3000: Add reset gpio support Date: Tue, 19 May 2020 20:24:47 +0200 Message-Id: <20200519182447.73405-6-sebastian.reichel@collabora.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200519182447.73405-1-sebastian.reichel@collabora.com> References: <20200519182447.73405-1-sebastian.reichel@collabora.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add basic support for an optional reset gpio. Signed-off-by: Sebastian Reichel --- .../bindings/input/touchscreen/exc3000.yaml | 2 ++ drivers/input/touchscreen/exc3000.c | 29 +++++++++++++++---- 2 files changed, 25 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/input/touchscreen/exc3000.yaml b/Documentation/devicetree/bindings/input/touchscreen/exc3000.yaml index d83b61e884df..8b70b918c7ca 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/exc3000.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/exc3000.yaml @@ -22,6 +22,8 @@ properties: const: 0x2a interrupts: maxItems: 1 + reset-gpios: + maxItems: 1 touchscreen-size-x: true touchscreen-size-y: true touchscreen-inverted-x: true diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c index 1ae758bbf627..9fed66ef1719 100644 --- a/drivers/input/touchscreen/exc3000.c +++ b/drivers/input/touchscreen/exc3000.c @@ -8,7 +8,9 @@ */ #include +#include #include +#include #include #include #include @@ -32,6 +34,9 @@ #define EXC3000_TIMEOUT_MS 100 +#define EXC3000_RESET_MS 10 +#define EXC3000_READY_MS 100 + static const struct i2c_device_id exc3000_id[]; struct eeti_dev_info { @@ -65,6 +70,7 @@ struct exc3000_data { const struct eeti_dev_info *info; struct input_dev *input; struct touchscreen_properties prop; + struct gpio_desc *reset; struct timer_list timer; u8 buf[2 * EXC3000_LEN_FRAME]; struct completion wait_event; @@ -305,16 +311,17 @@ static const struct attribute_group *exc3000_attribute_groups[] = { static int exc3000_probe(struct i2c_client *client) { + struct device *dev = &client->dev; struct exc3000_data *data; struct input_dev *input; int error, max_xy, retry; - data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->client = client; - data->info = device_get_match_data(&client->dev); + data->info = device_get_match_data(dev); if (!data->info) { enum eeti_dev_id eeti_dev_id = i2c_match_id(exc3000_id, client)->driver_data; @@ -324,7 +331,17 @@ static int exc3000_probe(struct i2c_client *client) init_completion(&data->wait_event); mutex_init(&data->query_lock); - input = devm_input_allocate_device(&client->dev); + data->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(data->reset)) + return PTR_ERR(data->reset); + + if (data->reset) { + msleep(EXC3000_RESET_MS); + gpiod_set_value_cansleep(data->reset, 0); + msleep(EXC3000_READY_MS); + } + + input = devm_input_allocate_device(dev); if (!input) return -ENOMEM; @@ -350,7 +367,7 @@ static int exc3000_probe(struct i2c_client *client) if (error) return error; - error = devm_request_threaded_irq(&client->dev, client->irq, + error = devm_request_threaded_irq(dev, client->irq, NULL, exc3000_interrupt, IRQF_ONESHOT, client->name, data); if (error) @@ -360,14 +377,14 @@ static int exc3000_probe(struct i2c_client *client) error = exc3000_get_model(data); if (!error) break; - dev_warn(&client->dev, "Retry %d get EETI EXC3000 model: %d\n", + dev_warn(dev, "Retry %d get EETI EXC3000 model: %d\n", retry + 1, error); } if (error) return error; - dev_dbg(&client->dev, "TS Model: %s", data->model); + dev_dbg(dev, "TS Model: %s", data->model); return 0; }