diff --git a/MAINTAINERS b/MAINTAINERS index b03c68cebe4c..f72af66b2889 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5006,6 +5006,12 @@ L: linux-input@vger.kernel.org S: Maintained F: drivers/input/touchscreen/cy8ctma140.c +CYPRESS STREETFIGHTER TOUCHKEYS DRIVER +M: Yassine Oudjana +L: linux-input@vger.kernel.org +S: Maintained +F: drivers/input/keyboard/cypress-sf.c + CYTTSP TOUCHSCREEN DRIVER M: Linus Walleij L: linux-input@vger.kernel.org diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 1b0afc8bf841..d3bf5c3f9add 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -791,4 +791,14 @@ config KEYBOARD_MTK_PMIC To compile this driver as a module, choose M here: the module will be called pmic-keys. +config KEYBOARD_CYPRESS_SF + tristate "Cypress StreetFighter touchkey support" + depends on I2C + help + Say Y here if you want to enable support for Cypress StreetFighter + touchkeys. + + To compile this driver as a module, choose M here: the + module will be called cypress-sf. + endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 1d689fdd5c00..e3c8648f834e 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_KEYBOARD_BCM) += bcm-keypad.o obj-$(CONFIG_KEYBOARD_CAP11XX) += cap11xx.o obj-$(CONFIG_KEYBOARD_CLPS711X) += clps711x-keypad.o obj-$(CONFIG_KEYBOARD_CROS_EC) += cros_ec_keyb.o +obj-$(CONFIG_KEYBOARD_CYPRESS_SF) += cypress-sf.o obj-$(CONFIG_KEYBOARD_DAVINCI) += davinci_keyscan.o obj-$(CONFIG_KEYBOARD_DLINK_DIR685) += dlink-dir685-touchkeys.o obj-$(CONFIG_KEYBOARD_EP93XX) += ep93xx_keypad.o diff --git a/drivers/input/keyboard/cypress-sf.c b/drivers/input/keyboard/cypress-sf.c new file mode 100644 index 000000000000..c28996028e80 --- /dev/null +++ b/drivers/input/keyboard/cypress-sf.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Cypress StreetFighter Touchkey Driver + * + * Copyright (c) 2021 Yassine Oudjana + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CYPRESS_SF_DEV_NAME "cypress-sf" + +#define CYPRESS_SF_REG_BUTTON_STATUS 0x4a + +struct cypress_sf_data { + struct i2c_client *client; + struct input_dev *input_dev; + struct regulator_bulk_data regulators[2]; + u32 *keycodes; + unsigned long keystates; + int num_keys; +}; + +static irqreturn_t cypress_sf_irq_handler(int irq, void *devid) +{ + struct cypress_sf_data *touchkey = devid; + unsigned long keystates, changed; + bool new_state; + int val, key; + + val = i2c_smbus_read_byte_data(touchkey->client, + CYPRESS_SF_REG_BUTTON_STATUS); + if (val < 0) { + dev_err(&touchkey->client->dev, + "Failed to read button status: %d", val); + return IRQ_NONE; + } + keystates = val; + + bitmap_xor(&changed, &keystates, &touchkey->keystates, + touchkey->num_keys); + + for_each_set_bit(key, &changed, touchkey->num_keys) { + new_state = keystates & BIT(key); + dev_dbg(&touchkey->client->dev, + "Key %d changed to %d", key, new_state); + input_report_key(touchkey->input_dev, + touchkey->keycodes[key], new_state); + } + + input_sync(touchkey->input_dev); + touchkey->keystates = keystates; + + return IRQ_HANDLED; +} + +static int cypress_sf_probe(struct i2c_client *client) +{ + struct cypress_sf_data *touchkey; + int key, error; + + 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 = "vdd"; + touchkey->regulators[1].supply = "avdd"; + + 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; + } + + touchkey->num_keys = device_property_read_u32_array(&client->dev, + "linux,keycodes", + NULL, 0); + if (touchkey->num_keys < 0) { + /* Default key count */ + touchkey->num_keys = 2; + } + + touchkey->keycodes = devm_kcalloc(&client->dev, + touchkey->num_keys, + sizeof(*touchkey->keycodes), + GFP_KERNEL); + if (!touchkey->keycodes) + return -ENOMEM; + + error = device_property_read_u32_array(&client->dev, "linux,keycodes", + touchkey->keycodes, + touchkey->num_keys); + + if (error) { + dev_warn(&client->dev, + "Failed to read keycodes: %d, using defaults\n", + error); + + /* Default keycodes */ + touchkey->keycodes[0] = KEY_BACK; + touchkey->keycodes[1] = KEY_MENU; + } + + error = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (error) { + dev_err(&client->dev, + "Failed to enable regulators: %d\n", error); + return error; + } + + 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 = CYPRESS_SF_DEV_NAME; + touchkey->input_dev->id.bustype = BUS_I2C; + + for (key = 0; key < touchkey->num_keys; ++key) + input_set_capability(touchkey->input_dev, + EV_KEY, touchkey->keycodes[key]); + + 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, cypress_sf_irq_handler, + IRQF_ONESHOT, + CYPRESS_SF_DEV_NAME, touchkey); + if (error) { + dev_err(&client->dev, + "Failed to register threaded irq: %d", error); + return error; + } + + return 0; +}; + +static int __maybe_unused cypress_sf_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct cypress_sf_data *touchkey = i2c_get_clientdata(client); + int error; + + disable_irq(client->irq); + + error = regulator_bulk_disable(ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (error) { + dev_err(dev, "Failed to disable regulators: %d", error); + enable_irq(client->irq); + return error; + } + + return 0; +} + +static int __maybe_unused cypress_sf_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct cypress_sf_data *touchkey = i2c_get_clientdata(client); + int error; + + error = regulator_bulk_enable(ARRAY_SIZE(touchkey->regulators), + touchkey->regulators); + if (error) { + dev_err(dev, "Failed to enable regulators: %d", error); + return error; + } + + enable_irq(client->irq); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(cypress_sf_pm_ops, + cypress_sf_suspend, cypress_sf_resume); + +static struct i2c_device_id cypress_sf_id_table[] = { + { CYPRESS_SF_DEV_NAME, 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, cypress_sf_id_table); + +#ifdef CONFIG_OF +static const struct of_device_id cypress_sf_of_match[] = { + { .compatible = "cypress,sf3155", }, + { }, +}; +MODULE_DEVICE_TABLE(of, cypress_sf_of_match); +#endif + +static struct i2c_driver cypress_sf_driver = { + .driver = { + .name = CYPRESS_SF_DEV_NAME, + .pm = &cypress_sf_pm_ops, + .of_match_table = of_match_ptr(cypress_sf_of_match), + }, + .id_table = cypress_sf_id_table, + .probe_new = cypress_sf_probe, +}; +module_i2c_driver(cypress_sf_driver); + +MODULE_AUTHOR("Yassine Oudjana "); +MODULE_DESCRIPTION("Cypress StreetFighter Touchkey Driver"); +MODULE_LICENSE("GPL v2");