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Mon, 9 Jan 2017 16:22:19 +0900 (KST) Received: from epcpsbgm1new.samsung.com (u26.gpu120.samsung.co.kr [203.254.230.26]) by epcas1p1.samsung.com (KnoxPortal) with ESMTP id 20170109072218epcas1p1f95be49f7f466712c146d1e9163601e1~YCYPSjRaO2906029060epcas1p1z; Mon, 9 Jan 2017 07:22:18 +0000 (GMT) X-AuditID: b6c32a37-f79606d000005083-5d-58733a2bd76a Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1new.samsung.com (EPCPMTA) with SMTP id 7A.26.08931.A2A33785; Mon, 9 Jan 2017 16:22:18 +0900 (KST) Received: from localhost.localdomain ([10.113.76.93]) by mmp1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0OJI00MXA4H3XR50@mmp1.samsung.com>; Mon, 09 Jan 2017 16:22:18 +0900 (KST) From: Jaechul Lee To: Dmitry Torokhov , Rob Herring , Mark Rutland , Catalin Marinas , Will Deacon , Kukjin Kim , Krzysztof Kozlowski , Javier Martinez Canillas Cc: Jaechul Lee , Andi Shyti , Chanwoo Choi , beomho.seo@samsung.com, galaxyra@gmail.com, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH v6 2/3] input: tm2-touchkey: Add touchkey driver support for TM2 Date: Mon, 09 Jan 2017 16:22:14 +0900 Message-id: <1483946535-4703-3-git-send-email-jcsing.lee@samsung.com> X-Mailer: git-send-email 2.7.4 In-reply-to: <1483946535-4703-1-git-send-email-jcsing.lee@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpik+LIzCtJLcpLzFFi42LZdlhTV1fbqjjC4GKviMX2I89YLU5/2sZu 8X5ZD6PF9S/PWS3mHznHanF40QtGi+MrZzFbvHm7hsni7f5uZov+x6+ZLc6f38BusenxNVaL m5++sVpc3jWHzWLG+X1MFkuvX2SyaN17hN3i5ccTLA5CHmvmrWH02DnrLrvHplWdbB6bl9R7 bOkH8vq2rGL0+LxJLoA9KtUmIzUxJbVIITUvOT8lMy/dVsk7ON453tTMwFDX0NLCXEkhLzE3 1VbJxSdA1y0zB+gNJYWyxJxSoFBAYnGxkr6dTVF+aUmqQkZ+cYmtUrShoZGeoYG5npGRkZ6J cayVkSlQSUJqxsw9RxkLjgVWvLi1jq2B8bBLFyMnh4SAiUTTvNUsELaYxIV769m6GLk4hAR2 MEp8mLCBFcJpZ5JYf+YpG0xH96dJzBCJ5YwSHTP3Q7V8Z5ToXX2TCaSKTUBLon9JD1hCROAo k8T1VZ/YQRxmgZNMEs1LloJtFBYIkvjzt5UVxGYRUJVYMasLrJtXwFVi1tI5zBD75CRunusE sjk4OAXcJDZ2JoHMkRA4xy6xtOU3E0hcQkBWYtMBqHIXif9bt0HZwhKvjm9hh7ClJVb9u8UE 0dvNKNF8dCeU08Eose/KAqjnjCXuP7gH1s0swCfx7msPK8QCXomONiEI00Pi+WcmiGpHif5d U1kgvp/JKLH0+2nGCYwyCxgZVjGKpRYU56anFhsWGOsVJ+YWl+al6yXn525iBKc/LfMdjBvO +RxiFOBgVOLhfeFTFCHEmlhWXJl7iFGCg1lJhHenWXGEEG9KYmVValF+fFFpTmrxIUZTYDBN ZJYSTc4Hpua8knhDEzNDEyMTQ0NzIwMjJXHexY3WEUIC6YklqdmpqQWpRTB9TBycUg2Mzq9P Sf2LdY5Oy1r45Zr0Sf4F9wtYzpdO9uLw276Y9YVX3KZ7TddEn6qZ5mSWbkq9lGwasPCmJUNV 3t+708siH33Pyza4YLhqyuknSzefleqMPdXBK9Gwav133Z1T/5nO19Vic/iVyq42d/nTGbl/ ixQ//md7Zvg4JfnlSunGXafvb62MkIrpVGIpzkg01GIuKk4EADETBUWVAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrHIsWRmVeSWpSXmKPExsVy+t9jAV0tq+IIg6NvLC22H3nGanH60zZ2 i/fLehgtrn95zmox/8g5VovDi14wWhxfOYvZ4s3bNUwWb/d3M1v0P37NbHH+/AZ2i02Pr7Fa 3Pz0jdXi8q45bBYzzu9jslh6/SKTReveI+wWLz+eYHEQ8lgzbw2jx85Zd9k9Nq3qZPPYvKTe Y0s/kNe3ZRWjx+dNcgHsUW42GamJKalFCql5yfkpmXnptkqhIW66FkoKeYm5qbZKEbq+IUFK CmWJOaVAnpEBGnBwDnAPVtK3S3DLmLnnKGPBscCKF7fWsTUwHnbpYuTkkBAwkej+NIkZwhaT uHBvPVsXIxeHkMBSRomJd3pZIZzvjBJ/Zm5iAqliE9CS6F/SA1YlInCUSeLS073MIA6zwHEm iXu/p7CCVAkLBEjs2z0NzGYRUJVYMasLrJtXwFVi1tI5UPvkJG6e6wSyOTg4BdwkNnYmgYSF gEpWTH/MPIGRdwEjwypGidSC5ILipPRcw7zUcr3ixNzi0rx0veT83E2M4Lh6JrWD8eAu90OM AhyMSjy8L3yKIoRYE8uKK3MPMUpwMCuJ8O40K44Q4k1JrKxKLcqPLyrNSS0+xGgKdNdEZinR 5HxgzOeVxBuamJuYGxtYmFtamhgpifM2zn4WLiSQnliSmp2aWpBaBNPHxMEp1cConGF8IPDr +h21LseD7dUt+24ttzklItjb0CZ2c8/EIwmcYd/2r7RdoWi/w4A7VqVdu1fa7ZPsyf9H+iKT TXo/OJ9uErH75+T440C+iJ3rtvC2Ry0NXUy8GlGiXZPj9W6JrfqR9PLMDb3LO2SFmYyO2N4R 7brbllKc3sk+sX/C8UbNIsdlNkosxRmJhlrMRcWJAEBe1kvBAgAA X-MTR: 20000000000000000@CPGS X-CMS-MailID: 20170109072218epcas1p1f95be49f7f466712c146d1e9163601e1 X-Msg-Generator: CA X-Sender-IP: 203.254.230.26 X-Local-Sender: =?UTF-8?B?7J207J6s7LKgG1RpemVuIFBsYXRmb3JtIExhYihTL1fshLw=?= =?UTF-8?B?7YSwKRvsgrzshLHsoITsnpAbUzUo7LGF7J6EKS/ssYXsnoQ=?= X-Global-Sender: =?UTF-8?B?SmFlQ2h1bCBMZWUbVGl6ZW4gUGxhdGZvcm0gTGFiLhtTYW1z?= =?UTF-8?B?dW5nIEVsZWN0cm9uaWNzG1NlbmlvciBFbmdpbmVlcg==?= X-Sender-Code: =?UTF-8?B?QzEwG1NUQUYbQzEwVjgxMTE=?= CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-HopCount: 7 X-CMS-RootMailID: 20170109072218epcas1p1f95be49f7f466712c146d1e9163601e1 X-RootMTR: 20170109072218epcas1p1f95be49f7f466712c146d1e9163601e1 References: <1483946535-4703-1-git-send-email-jcsing.lee@samsung.com> 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 This patch adds support for the TM2 touch key and led functionality. The driver interfaces with userspace through an input device and reports KEY_PHONE and KEY_BACK event types. LED brightness can be controlled by "/sys/class/leds/tm2-touchkey/brightness". Signed-off-by: Beomho Seo Signed-off-by: Jaechul Lee Reviewed-by: Javier Martinez Canillas Reviewed-by: Andi Shyti Acked-by: Krzysztof Kozlowski Reviewed-by: Chanwoo Choi Tested-by: Chanwoo Choi --- drivers/input/keyboard/Kconfig | 11 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/tm2-touchkey.c | 287 ++++++++++++++++++++++++++++++++++ 3 files changed, 299 insertions(+) create mode 100644 drivers/input/keyboard/tm2-touchkey.c diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index cbd75cf..97acd65 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -666,6 +666,17 @@ config KEYBOARD_TC3589X To compile this driver as a module, choose M here: the module will be called tc3589x-keypad. +config KEYBOARD_TM2_TOUCHKEY + tristate "TM2 touchkey support" + depends on I2C + depends on LEDS_CLASS + help + Say Y here to enable device driver for tm2-touchkey with + LED control for the Exynos5433 TM2 board. + + To compile this driver as a module, choose M here. + module will be called tm2-touchkey. + config KEYBOARD_TWL4030 tristate "TI TWL4030/TWL5030/TPS659x0 keypad support" depends on TWL4030_CORE diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index d9f4cfc..7d9acff 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_KEYBOARD_SUN4I_LRADC) += sun4i-lradc-keys.o obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o +obj-$(CONFIG_KEYBOARD_TM2_TOUCHKEY) += tm2-touchkey.o obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o diff --git a/drivers/input/keyboard/tm2-touchkey.c b/drivers/input/keyboard/tm2-touchkey.c new file mode 100644 index 0000000..e927d06 --- /dev/null +++ b/drivers/input/keyboard/tm2-touchkey.c @@ -0,0 +1,287 @@ +/* + * TM2 touchkey device driver + * + * Copyright 2005 Phil Blundell + * Copyright 2016 Samsung Electronics Co., Ltd. + * + * Author: Beomho Seo + * Author: Jaechul Lee + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TM2_TOUCHKEY_DEV_NAME "tm2-touchkey" +#define TM2_TOUCHKEY_KEYCODE_REG 0x03 +#define TM2_TOUCHKEY_BASE_REG 0x00 +#define TM2_TOUCHKEY_CMD_LED_ON 0x10 +#define TM2_TOUCHKEY_CMD_LED_OFF 0x20 +#define TM2_TOUCHKEY_BIT_PRESS_EV BIT(3) +#define TM2_TOUCHKEY_BIT_KEYCODE GENMASK(2, 0) +#define TM2_TOUCHKEY_LED_VOLTAGE_MIN 2500000 +#define TM2_TOUCHKEY_LED_VOLTAGE_MAX 3300000 + +enum { + TM2_TOUCHKEY_KEY_MENU = 0x1, + TM2_TOUCHKEY_KEY_BACK, +}; + +enum { + TM2_TOUCHKEY_SUPPLIES_VCC, + TM2_TOUCHKEY_SUPPLIES_VDD, +}; + +struct tm2_touchkey_data { + struct i2c_client *client; + struct input_dev *input_dev; + struct led_classdev led_dev; + struct regulator_bulk_data regulators[2]; + + u8 keycode_type; + u8 pressed; +}; + +static void tm2_touchkey_led_brightness_set(struct led_classdev *led_dev, + enum led_brightness brightness) +{ + struct tm2_touchkey_data *touchkey = + container_of(led_dev, struct tm2_touchkey_data, led_dev); + u32 volt; + u8 data; + + if (brightness == LED_OFF) { + volt = TM2_TOUCHKEY_LED_VOLTAGE_MIN; + data = TM2_TOUCHKEY_CMD_LED_OFF; + } else { + volt = TM2_TOUCHKEY_LED_VOLTAGE_MAX; + data = TM2_TOUCHKEY_CMD_LED_ON; + } + + regulator_set_voltage( + touchkey->regulators[TM2_TOUCHKEY_SUPPLIES_VDD].consumer, + volt, volt); + i2c_smbus_write_byte_data(touchkey->client, + TM2_TOUCHKEY_BASE_REG, data); +} + +static int tm2_touchkey_power_enable(struct tm2_touchkey_data *touchkey) +{ + int ret = 0; + + ret = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (ret) + return ret; + + /* waiting for device initialization, at least 150ms */ + msleep(150); + + return 0; +} + +static void tm2_touchkey_power_disable(void *data) +{ + struct tm2_touchkey_data *touchkey = data; + + regulator_bulk_disable(ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); +} + +static irqreturn_t tm2_touchkey_irq_handler(int irq, void *devid) +{ + struct tm2_touchkey_data *touchkey = devid; + u32 data; + + data = i2c_smbus_read_byte_data(touchkey->client, + TM2_TOUCHKEY_KEYCODE_REG); + + if (data < 0) { + dev_err(&touchkey->client->dev, "Failed to read i2c data\n"); + return IRQ_HANDLED; + } + + touchkey->keycode_type = data & TM2_TOUCHKEY_BIT_KEYCODE; + touchkey->pressed = !(data & TM2_TOUCHKEY_BIT_PRESS_EV); + + if (touchkey->keycode_type != TM2_TOUCHKEY_KEY_MENU && + touchkey->keycode_type != TM2_TOUCHKEY_KEY_BACK) { + dev_warn(&touchkey->client->dev, "Skip unhandled keycode(%d)\n", + touchkey->keycode_type); + return IRQ_HANDLED; + } + + if (!touchkey->pressed) { + input_report_key(touchkey->input_dev, KEY_PHONE, 0); + input_report_key(touchkey->input_dev, KEY_BACK, 0); + } else { + if (touchkey->keycode_type == TM2_TOUCHKEY_KEY_MENU) + input_report_key(touchkey->input_dev, + KEY_PHONE, 1); + else + input_report_key(touchkey->input_dev, + KEY_BACK, 1); + } + input_sync(touchkey->input_dev); + + return IRQ_HANDLED; +} + +static int tm2_touchkey_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct tm2_touchkey_data *touchkey; + int ret; + + ret = i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE | + I2C_FUNC_SMBUS_BYTE_DATA); + if (!ret) { + dev_err(&client->dev, "No I2C functionality found\n"); + return -ENODEV; + } + + touchkey = devm_kzalloc(&client->dev, sizeof(*touchkey), GFP_KERNEL); + if (!touchkey) + return -ENOMEM; + + touchkey->client = client; + i2c_set_clientdata(client, touchkey); + + /* regulators */ + touchkey->regulators[TM2_TOUCHKEY_SUPPLIES_VCC].supply = "vcc"; + touchkey->regulators[TM2_TOUCHKEY_SUPPLIES_VDD].supply = "vdd"; + ret = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (ret) { + dev_err(&client->dev, "Failed to get regulators\n"); + return ret; + } + + /* power */ + ret = tm2_touchkey_power_enable(touchkey); + if (ret) { + dev_err(&client->dev, "Failed to enable power\n"); + return ret; + } + + ret = devm_add_action_or_reset(&client->dev, + tm2_touchkey_power_disable, touchkey); + if (ret) + return ret; + + /* input device */ + touchkey->input_dev = devm_input_allocate_device(&client->dev); + if (!touchkey->input_dev) { + dev_err(&client->dev, "Failed to alloc input device\n"); + return -ENOMEM; + } + touchkey->input_dev->name = TM2_TOUCHKEY_DEV_NAME; + touchkey->input_dev->id.bustype = BUS_I2C; + + set_bit(EV_KEY, touchkey->input_dev->evbit); + input_set_capability(touchkey->input_dev, EV_KEY, KEY_PHONE); + input_set_capability(touchkey->input_dev, EV_KEY, KEY_BACK); + + input_set_drvdata(touchkey->input_dev, touchkey); + + ret = input_register_device(touchkey->input_dev); + if (ret) { + dev_err(&client->dev, "Failed to register input device\n"); + return ret; + } + + /* irq */ + ret = devm_request_threaded_irq(&client->dev, + client->irq, NULL, + tm2_touchkey_irq_handler, + IRQF_ONESHOT, TM2_TOUCHKEY_DEV_NAME, + touchkey); + if (ret) { + dev_err(&client->dev, "Failed to request threaded irq\n"); + return ret; + } + + /* led device */ + touchkey->led_dev.name = TM2_TOUCHKEY_DEV_NAME; + touchkey->led_dev.brightness = LED_FULL; + touchkey->led_dev.max_brightness = LED_FULL; + touchkey->led_dev.brightness_set = tm2_touchkey_led_brightness_set; + + ret = devm_led_classdev_register(&client->dev, &touchkey->led_dev); + if (ret < 0) { + dev_err(&client->dev, "Failed to register touchkey led\n"); + return ret; + } + + return 0; +} + +static int __maybe_unused tm2_touchkey_suspend(struct device *dev) +{ + struct tm2_touchkey_data *touchkey = dev_get_drvdata(dev); + + disable_irq(touchkey->client->irq); + tm2_touchkey_power_disable(touchkey); + + return 0; +} + +static int __maybe_unused tm2_touchkey_resume(struct device *dev) +{ + struct tm2_touchkey_data *touchkey = dev_get_drvdata(dev); + int ret; + + enable_irq(touchkey->client->irq); + ret = tm2_touchkey_power_enable(touchkey); + if (ret) + dev_err(dev, "Failed to enable power\n"); + + return ret; +} + +static SIMPLE_DEV_PM_OPS(tm2_touchkey_pm_ops, tm2_touchkey_suspend, + tm2_touchkey_resume); + +static const struct i2c_device_id tm2_touchkey_id_table[] = { + {TM2_TOUCHKEY_DEV_NAME, 0}, + {}, +}; +MODULE_DEVICE_TABLE(i2c, tm2_touchkey_id_table); + +static const struct of_device_id tm2_touchkey_of_match[] = { + {.compatible = "cypress,tm2-touchkey",}, + {}, +}; +MODULE_DEVICE_TABLE(of, tm2_touchkey_of_match); + +static struct i2c_driver tm2_touchkey_driver = { + .driver = { + .name = TM2_TOUCHKEY_DEV_NAME, + .pm = &tm2_touchkey_pm_ops, + .of_match_table = of_match_ptr(tm2_touchkey_of_match), + }, + .probe = tm2_touchkey_probe, + .id_table = tm2_touchkey_id_table, +}; + +module_i2c_driver(tm2_touchkey_driver); + +MODULE_AUTHOR("Beomho Seo "); +MODULE_AUTHOR("Jaechul Lee "); +MODULE_DESCRIPTION("Samsung touchkey driver"); +MODULE_LICENSE("GPL v2");