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Tue, 17 Jan 2017 14:54:44 +0900 (KST) Received: from epcpsbgm1new.samsung.com (u26.gpu120.samsung.co.kr [203.254.230.26]) by epcas1p4.samsung.com (KnoxPortal) with ESMTP id 20170117055444epcas1p47b0b0a0ae3260b22fa61d2b92362050b~aeWD1IRMR2250022500epcas1p4q; Tue, 17 Jan 2017 05:54:44 +0000 (GMT) X-AuditID: b6c32a39-f793d6d000000fd7-75-587db1a4b62a Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1new.samsung.com (EPCPMTA) with SMTP id D2.0F.08931.4A1BD785; Tue, 17 Jan 2017 14:54:44 +0900 (KST) Received: from localhost.localdomain ([10.113.76.93]) by mmp2.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0OJW00EYHTR30720@mmp2.samsung.com>; Tue, 17 Jan 2017 14:54:43 +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 v7 2/3] input: tm2-touchkey: Add touchkey driver support for TM2 Date: Tue, 17 Jan 2017 14:54:38 +0900 Message-id: <1484632479-3111-3-git-send-email-jcsing.lee@samsung.com> X-Mailer: git-send-email 2.7.4 In-reply-to: <1484632479-3111-1-git-send-email-jcsing.lee@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpmk+LIzCtJLcpLzFFi42LZdlhTX3fJxtoIg7MtxhbbjzxjtTj9aRu7 xftlPYwW1788Z7WYf+Qcq8XhRS8YLY6vnMVs8ebtGiaLt/u7mS36H79mtjh/fgO7xabH11gt bn76xmpxedccNosZ5/cxWSy9fpHJonXvEXaLlx9PsDgIeayZt4bRY+esu+wem1Z1snlsXlLv saUfyOvbsorR4/MmuQD2qFSbjNTElNQihdS85PyUzLx0WyXv4HjneFMzA0NdQ0sLcyWFvMTc VFslF58AXbfMHKA3lBTKEnNKgUIBicXFSvp2NkX5pSWpChn5xSW2StGGhkZ6hgbmekZGRnom xrFWRqZAJQmpGVP/7WYraA+q6FzSzNjA+Nali5GTQ0LARGLNrNusELaYxIV769m6GLk4hAR2 MEo83v6fFcJpZ5KY9+cQI0zH99VtbCC2kMAcRomTz0Ugir4zSiz9uYsdJMEmoCXRv6QHbJSI wFEmieurPrGDOMwCJ5kkmpcsZQGpEhYIkpj4dydYB4uAqkTb4gNgK3gFXCXeH+5ih1gnJ3Hz XCcziM0p4Cbx5dITsKkSApfYJQ68vsXUxcgB5MhKbDrADFHvIvHm7mQmCFtY4tXxLVBzpCVW /QMpB+ntZpRoProTyulglNh3ZQEbRJWxxP0H98AmMQvwSbz72sMKsYBXoqNNCKLEQ+LM+8dQ Qx0lGp/vZof4fybQ0CMz2CcwyixgZFjFKJZaUJybnlpsWGCqV5yYW1yal66XnJ+7iRGcALUs dzAeO+dziFGAg1GJh3fG3ZoIIdbEsuLK3EOMEhzMSiK8nCtrI4R4UxIrq1KL8uOLSnNSiw8x mgIDaiKzlGhyPjA555XEG5qYGZoYmRgamhsZGCmJ8y5utI4QEkhPLEnNTk0tSC2C6WPi4JRq YDxWL216VSWc51fDfW7haLbsq8t684/rvDiW4ehi/iL7nb3y0mXrvpmfcXZiPq+w8222svln mX838s+8M2KePlsgyihy7ft4oRPnpAKmXKl/cMv67AlT1n2bdy1rSNs/Zf9709+StVzHdUOT UsUf3LvqNv/oq+O/J0s+XSgtaZS7Y+s7Tj8tvl9KLMUZiYZazEXFiQDz8m6AlgMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrPIsWRmVeSWpSXmKPExsVy+t9jQd0lG2sjDPYul7HYfuQZq8XpT9vY Ld4v62G0uP7lOavF/CPnWC0OL3rBaHF85Sxmizdv1zBZvN3fzWzR//g1s8X58xvYLTY9vsZq cfPTN1aLy7vmsFnMOL+PyWLp9YtMFq17j7BbvPx4gsVByGPNvDWMHjtn3WX32LSqk81j85J6 jy39QF7fllWMHp83yQWwR7nZZKQmpqQWKaTmJeenZOal2yqFhrjpWigp5CXmptoqRej6hgQp KZQl5pQCeUYGaMDBOcA9WEnfLsEtY+q/3WwF7UEVnUuaGRsY37p0MXJySAiYSHxf3cYGYYtJ XLi3Hsjm4hASmMUocaZnFTuE851R4ve7j0wgVWwCWhL9S3rAqkQEjjJJXHq6lxnEYRY4ziRx 7/cUVpAqYYEAib5H31hAbBYBVYm2xQcYQWxeAVeJ94e72CH2yUncPNfJDGJzCrhJfLn0BOwO IaCaJZNPMU9g5F3AyLCKUSK1ILmgOCk91zAvtVyvODG3uDQvXS85P3cTIziynkntYDy4y/0Q owAHoxIPb0FAbYQQa2JZcWXuIUYJDmYlEV7OlUAh3pTEyqrUovz4otKc1OJDjKZAh01klhJN zgdGfV5JvKGJuYm5sYGFuaWliZGSOG/j7GfhQgLpiSWp2ampBalFMH1MHJxSDYwVdRqFOYkX na81MHqaCP5j28LTmVc0LVgh6OL2M4yLDudMYe1dFRtxji1n7gdzy6fNly6fvvZmUoCwzo6+ iuh14XvSFjbu+1PjWuOv07noUHHV8wuFD5kEdZN2O8230AmyLjC0Dd/59Nvb2y5N/qdsj8eJ KR3fsOiGT9bcG2aa0vtVH6p6nFdiKc5INNRiLipOBABvAMpSwgIAAA== X-MTR: 20000000000000000@CPGS X-CMS-MailID: 20170117055444epcas1p47b0b0a0ae3260b22fa61d2b92362050b 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: 20170117055444epcas1p47b0b0a0ae3260b22fa61d2b92362050b X-RootMTR: 20170117055444epcas1p47b0b0a0ae3260b22fa61d2b92362050b References: <1484632479-3111-1-git-send-email-jcsing.lee@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@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 Reviewed-by: Chanwoo Choi Tested-by: Chanwoo Choi Acked-by: Krzysztof Kozlowski Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/Kconfig | 11 ++ drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/tm2-touchkey.c | 286 ++++++++++++++++++++++++++++++++++ 3 files changed, 298 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..916e2f3 --- /dev/null +++ b/drivers/input/keyboard/tm2-touchkey.c @@ -0,0 +1,286 @@ +/* + * 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, +}; + +struct tm2_touchkey_data { + struct i2c_client *client; + struct input_dev *input_dev; + struct led_classdev led_dev; + struct regulator *vdd; + struct regulator_bulk_data regulators[2]; +}; + +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->vdd, 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 error; + + error = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (error) + return error; + + /* 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; + int data; + int key; + + 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: %d\n", data); + goto out; + } + + switch (data & TM2_TOUCHKEY_BIT_KEYCODE) { + case TM2_TOUCHKEY_KEY_MENU: + key = KEY_PHONE; + break; + + case TM2_TOUCHKEY_KEY_BACK: + key = KEY_BACK; + break; + + default: + dev_warn(&touchkey->client->dev, + "unhandled keycode, data %#02x\n", data); + goto out; + } + + if (data & TM2_TOUCHKEY_BIT_PRESS_EV) { + input_report_key(touchkey->input_dev, KEY_PHONE, 0); + input_report_key(touchkey->input_dev, KEY_BACK, 0); + } else { + input_report_key(touchkey->input_dev, key, 1); + } + + input_sync(touchkey->input_dev); + +out: + return IRQ_HANDLED; +} + +static int tm2_touchkey_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct tm2_touchkey_data *touchkey; + int error; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_err(&client->dev, "incompatible I2C adapter\n"); + return -EIO; + } + + touchkey = devm_kzalloc(&client->dev, sizeof(*touchkey), GFP_KERNEL); + if (!touchkey) + return -ENOMEM; + + touchkey->client = client; + i2c_set_clientdata(client, touchkey); + + touchkey->regulators[0].supply = "vcc"; + touchkey->regulators[1].supply = "vdd"; + error = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (error) { + dev_err(&client->dev, "failed to get regulators: %d\n", error); + return error; + } + + /* Save VDD for easy access */ + touchkey->vdd = touchkey->regulators[1].consumer; + + error = tm2_touchkey_power_enable(touchkey); + if (error) { + dev_err(&client->dev, "failed to power up device: %d\n", error); + return error; + } + + error = devm_add_action_or_reset(&client->dev, + tm2_touchkey_power_disable, touchkey); + if (error) { + dev_err(&client->dev, + "failed to install poweroff handler: %d\n", error); + return error; + } + + /* input device */ + touchkey->input_dev = devm_input_allocate_device(&client->dev); + if (!touchkey->input_dev) { + dev_err(&client->dev, "failed to allocate input device\n"); + return -ENOMEM; + } + + touchkey->input_dev->name = TM2_TOUCHKEY_DEV_NAME; + touchkey->input_dev->id.bustype = BUS_I2C; + + 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); + + error = input_register_device(touchkey->input_dev); + if (error) { + dev_err(&client->dev, + "failed to register input device: %d\n", error); + return error; + } + + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, tm2_touchkey_irq_handler, + IRQF_ONESHOT, + TM2_TOUCHKEY_DEV_NAME, touchkey); + if (error) { + dev_err(&client->dev, + "failed to request threaded irq: %d\n", error); + return error; + } + + /* 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; + + error = devm_led_classdev_register(&client->dev, &touchkey->led_dev); + if (error) { + dev_err(&client->dev, + "failed to register touchkey led: %d\n", error); + return error; + } + + return 0; +} + +static int __maybe_unused tm2_touchkey_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct tm2_touchkey_data *touchkey = i2c_get_clientdata(client); + + disable_irq(client->irq); + tm2_touchkey_power_disable(touchkey); + + return 0; +} + +static int __maybe_unused tm2_touchkey_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct tm2_touchkey_data *touchkey = i2c_get_clientdata(client); + int ret; + + enable_irq(client->irq); + + ret = tm2_touchkey_power_enable(touchkey); + if (ret) + dev_err(dev, "failed to enable power: %d\n", ret); + + 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");