From patchwork Wed Aug 5 16:05:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Reichel X-Patchwork-Id: 11702511 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 385A914DD for ; Wed, 5 Aug 2020 20:13:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 27A5F22CAD for ; Wed, 5 Aug 2020 20:13:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726709AbgHEUMt (ORCPT ); Wed, 5 Aug 2020 16:12:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726963AbgHEQZe (ORCPT ); Wed, 5 Aug 2020 12:25:34 -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 88938C001FD7; Wed, 5 Aug 2020 09:05:26 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: sre) with ESMTPSA id 7A21D299003 Received: by jupiter.universe (Postfix, from userid 1000) id 4024148011B; Wed, 5 Aug 2020 18:05:21 +0200 (CEST) From: Sebastian Reichel To: Dmitry Torokhov , Ahmet Inan , Martin Fuzzey , Rob Herring Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@collabora.com, Sebastian Reichel , Enric Balletbo i Serra Subject: [PATCHv4 3/4] Input: EXC3000: Add reset gpio support Date: Wed, 5 Aug 2020 18:05:19 +0200 Message-Id: <20200805160520.456570-4-sebastian.reichel@collabora.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200805160520.456570-1-sebastian.reichel@collabora.com> References: <20200805160520.456570-1-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. Reviewed-by: Enric Balletbo i Serra Signed-off-by: Sebastian Reichel Acked-by: Rob Herring --- .../input/touchscreen/eeti,exc3000.yaml | 2 ++ drivers/input/touchscreen/exc3000.c | 17 +++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml b/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml index 7e6e23f8fa00..007adbc89c14 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/eeti,exc3000.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/eeti,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 b497bd2ae41d..203f50acaab7 100644 --- a/drivers/input/touchscreen/exc3000.c +++ b/drivers/input/touchscreen/exc3000.c @@ -8,7 +8,9 @@ */ #include +#include #include +#include #include #include #include @@ -30,6 +32,9 @@ #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 { @@ -63,6 +68,7 @@ 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]; }; @@ -204,6 +210,17 @@ static int exc3000_probe(struct i2c_client *client) } timer_setup(&data->timer, exc3000_timer, 0); + data->reset = devm_gpiod_get_optional(&client->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(&client->dev); if (!input) return -ENOMEM;