From patchwork Mon Aug 31 23:17:03 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Franklin Cooper X-Patchwork-Id: 7102001 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 16D72BEEC1 for ; Mon, 31 Aug 2015 23:18:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 711622068F for ; Mon, 31 Aug 2015 23:18:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1B32720687 for ; Mon, 31 Aug 2015 23:18:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752391AbbHaXRj (ORCPT ); Mon, 31 Aug 2015 19:17:39 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:52497 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752064AbbHaXRi (ORCPT ); Mon, 31 Aug 2015 19:17:38 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id t7VNHNcH008712; Mon, 31 Aug 2015 18:17:23 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id t7VNHM96032410; Mon, 31 Aug 2015 18:17:22 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.224.2; Mon, 31 Aug 2015 18:17:22 -0500 Received: from franklin-Desktop-Linux.fios-router.home (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t7VNHJs6027373; Mon, 31 Aug 2015 18:17:20 -0500 From: Franklin S Cooper Jr To: , , , , , , , , CC: Franklin S Cooper Jr Subject: [PATCH] Input: edt-ft5x06 - Switch to newer gpio framework Date: Mon, 31 Aug 2015 18:17:03 -0500 Message-ID: <1441063023-11567-1-git-send-email-fcooper@ti.com> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The current/old gpio framework used doesn't properly listen to ACTIVE_LOW and ACTIVE_HIGH flags. The newer gpio framework takes into account these flags when setting gpio values. Since the values being outputed were base on voltage and not logic the values being outputted must change to refect this difference. Also use gpiod_set_value_cansleep since wake and reset pins can be provided by bus based io expanders. Switch from msleep(5) to udelay_range(5000,6000) to avoid check patch warning. Signed-off-by: Franklin S Cooper Jr --- .../bindings/input/touchscreen/edt-ft5x06.txt | 4 +- drivers/input/touchscreen/edt-ft5x06.c | 132 +++++++-------------- include/linux/input/edt-ft5x06.h | 4 +- 3 files changed, 47 insertions(+), 93 deletions(-) diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt index 76db967..9330d4d 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt @@ -50,6 +50,6 @@ Example: pinctrl-0 = <&edt_ft5x06_pins>; interrupt-parent = <&gpio2>; interrupts = <5 0>; - reset-gpios = <&gpio2 6 1>; - wake-gpios = <&gpio4 9 0>; + reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>; + wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>; }; diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index 394b1de..d64d29a 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -91,9 +91,9 @@ struct edt_ft5x06_ts_data { u16 num_x; u16 num_y; - int reset_pin; - int irq_pin; - int wake_pin; + struct gpio_desc *reset_pin; + struct gpio_desc *wake_pin; + struct gpio_desc *irq_pin; #if defined(CONFIG_DEBUG_FS) struct dentry *debug_dir; @@ -752,45 +752,6 @@ edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) #endif /* CONFIG_DEBUGFS */ -static int edt_ft5x06_ts_reset(struct i2c_client *client, - struct edt_ft5x06_ts_data *tsdata) -{ - int error; - - if (gpio_is_valid(tsdata->wake_pin)) { - error = devm_gpio_request_one(&client->dev, - tsdata->wake_pin, GPIOF_OUT_INIT_LOW, - "edt-ft5x06 wake"); - if (error) { - dev_err(&client->dev, - "Failed to request GPIO %d as wake pin, error %d\n", - tsdata->wake_pin, error); - return error; - } - - msleep(5); - gpio_set_value(tsdata->wake_pin, 1); - } - if (gpio_is_valid(tsdata->reset_pin)) { - /* this pulls reset down, enabling the low active reset */ - error = devm_gpio_request_one(&client->dev, - tsdata->reset_pin, GPIOF_OUT_INIT_LOW, - "edt-ft5x06 reset"); - if (error) { - dev_err(&client->dev, - "Failed to request GPIO %d as reset pin, error %d\n", - tsdata->reset_pin, error); - return error; - } - - msleep(5); - gpio_set_value(tsdata->reset_pin, 1); - msleep(300); - } - - return 0; -} - static int edt_ft5x06_ts_identify(struct i2c_client *client, struct edt_ft5x06_ts_data *tsdata, char *fw_version) @@ -931,30 +892,6 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) } } -#ifdef CONFIG_OF -static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev, - struct edt_ft5x06_ts_data *tsdata) -{ - struct device_node *np = dev->of_node; - - /* - * irq_pin is not needed for DT setup. - * irq is associated via 'interrupts' property in DT - */ - tsdata->irq_pin = -EINVAL; - tsdata->reset_pin = of_get_named_gpio(np, "reset-gpios", 0); - tsdata->wake_pin = of_get_named_gpio(np, "wake-gpios", 0); - - return 0; -} -#else -static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev, - struct edt_ft5x06_ts_data *tsdata) -{ - return -ENODEV; -} -#endif - static int edt_ft5x06_ts_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -964,6 +901,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, struct input_dev *input; int error; char fw_version[EDT_NAME_LEN]; + struct gpio_desc *gpio; dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); @@ -973,32 +911,47 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, return -ENOMEM; } - if (!pdata) { - error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata); - if (error) { - dev_err(&client->dev, - "DT probe failed and no platform data present\n"); - return error; - } - } else { - tsdata->reset_pin = pdata->reset_pin; - tsdata->irq_pin = pdata->irq_pin; - tsdata->wake_pin = -EINVAL; + gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(gpio)) { + error = PTR_ERR(gpio); + dev_err(&client->dev, + "Failed to request GPIO reset pin, error %d\n", error); + return error; } - error = edt_ft5x06_ts_reset(client, tsdata); - if (error) + tsdata->reset_pin = gpio; + + gpio = devm_gpiod_get_optional(&client->dev, "wake", GPIOD_OUT_LOW); + + if (IS_ERR(gpio)) { + error = PTR_ERR(gpio); + dev_err(&client->dev, + "Failed to request GPIO wake pin, error %d\n", error); return error; + } - if (gpio_is_valid(tsdata->irq_pin)) { - error = devm_gpio_request_one(&client->dev, tsdata->irq_pin, - GPIOF_IN, "edt-ft5x06 irq"); - if (error) { - dev_err(&client->dev, - "Failed to request GPIO %d, error %d\n", - tsdata->irq_pin, error); - return error; - } + tsdata->wake_pin = gpio; + + gpio = devm_gpiod_get_optional(&client->dev, "irq", GPIOD_IN); + + if (IS_ERR(gpio)) { + error = PTR_ERR(gpio); + dev_err(&client->dev, + "Failed to request GPIO irq pin, error %d\n", error); + return error; + } + + tsdata->irq_pin = gpio; + + if (tsdata->wake_pin) { + usleep_range(5000, 6000); + gpiod_set_value_cansleep(tsdata->wake_pin, 1); + } + + if (tsdata->reset_pin) { + usleep_range(5000, 6000); + gpiod_set_value_cansleep(tsdata->reset_pin, 0); + msleep(300); } input = devm_input_allocate_device(&client->dev); @@ -1074,7 +1027,8 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, dev_dbg(&client->dev, "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", - client->irq, tsdata->wake_pin, tsdata->reset_pin); + client->irq, desc_to_gpio(tsdata->wake_pin), + desc_to_gpio(tsdata->reset_pin)); return 0; diff --git a/include/linux/input/edt-ft5x06.h b/include/linux/input/edt-ft5x06.h index 8a1e0d1..058473a 100644 --- a/include/linux/input/edt-ft5x06.h +++ b/include/linux/input/edt-ft5x06.h @@ -10,8 +10,8 @@ */ struct edt_ft5x06_platform_data { - int irq_pin; - int reset_pin; + int irq_gpio; + int reset_gpio; /* startup defaults for operational parameters */ bool use_parameters;