diff options
| -rw-r--r-- | Documentation/devicetree/bindings/input/gpio-vibrator.yaml | 37 | ||||
| -rw-r--r-- | drivers/input/misc/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/input/misc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/misc/gpio-vibra.c | 207 |
4 files changed, 257 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/gpio-vibrator.yaml b/Documentation/devicetree/bindings/input/gpio-vibrator.yaml new file mode 100644 index 000000000000..903475f52dbd --- /dev/null +++ b/Documentation/devicetree/bindings/input/gpio-vibrator.yaml @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bindings/input/gpio-vibrator.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: GPIO vibrator + +maintainers: + - Luca Weiss <luca@z3ntu.xyz> + +description: |+ + Registers a GPIO device as vibrator, where the on/off capability is controlled by a GPIO. + +properties: + compatible: + const: gpio-vibrator + + enable-gpios: + maxItems: 1 + + vcc-supply: + description: Regulator that provides power + +required: + - compatible + - enable-gpios + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + vibrator { + compatible = "gpio-vibrator"; + enable-gpios = <&msmgpio 86 GPIO_ACTIVE_HIGH>; + vcc-supply = <&pm8941_l18>; + }; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index e39aef84f357..16f41eece6d2 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -290,6 +290,18 @@ config INPUT_GPIO_DECODER To compile this driver as a module, choose M here: the module will be called gpio_decoder. +config INPUT_GPIO_VIBRA + tristate "GPIO vibrator support" + depends on GPIOLIB || COMPILE_TEST + select INPUT_FF_MEMLESS + help + Say Y here to get support for GPIO based vibrator devices. + + If unsure, say N. + + To compile this driver as a module, choose M here: the module will be + called gpio-vibra. + config INPUT_IXP4XX_BEEPER tristate "IXP4XX Beeper support" depends on ARCH_IXP4XX diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 96a6419cb1f2..d871991c2eee 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o obj-$(CONFIG_INPUT_GPIO_DECODER) += gpio_decoder.o +obj-$(CONFIG_INPUT_GPIO_VIBRA) += gpio-vibra.o obj-$(CONFIG_INPUT_HISI_POWERKEY) += hisi_powerkey.o obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o obj-$(CONFIG_INPUT_IMS_PCU) += ims-pcu.o diff --git a/drivers/input/misc/gpio-vibra.c b/drivers/input/misc/gpio-vibra.c new file mode 100644 index 000000000000..f79f75595dd7 --- /dev/null +++ b/drivers/input/misc/gpio-vibra.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * GPIO vibrator driver + * + * Copyright (C) 2019 Luca Weiss <luca@z3ntu.xyz> + * + * Based on PWM vibrator driver: + * Copyright (C) 2017 Collabora Ltd. + * + * Based on previous work from: + * Copyright (C) 2012 Dmitry Torokhov <dmitry.torokhov@gmail.com> + * + * Based on PWM beeper driver: + * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> + */ + +#include <linux/gpio/consumer.h> +#include <linux/input.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> + +struct gpio_vibrator { + struct input_dev *input; + struct gpio_desc *gpio; + struct regulator *vcc; + + struct work_struct play_work; + bool running; + bool vcc_on; +}; + +static int gpio_vibrator_start(struct gpio_vibrator *vibrator) +{ + struct device *pdev = vibrator->input->dev.parent; + int err; + + if (!vibrator->vcc_on) { + err = regulator_enable(vibrator->vcc); + if (err) { + dev_err(pdev, "failed to enable regulator: %d\n", err); + return err; + } + vibrator->vcc_on = true; + } + + gpiod_set_value_cansleep(vibrator->gpio, 1); + + return 0; +} + +static void gpio_vibrator_stop(struct gpio_vibrator *vibrator) +{ + gpiod_set_value_cansleep(vibrator->gpio, 0); + + if (vibrator->vcc_on) { + regulator_disable(vibrator->vcc); + vibrator->vcc_on = false; + } +} + +static void gpio_vibrator_play_work(struct work_struct *work) +{ + struct gpio_vibrator *vibrator = + container_of(work, struct gpio_vibrator, play_work); + + if (vibrator->running) + gpio_vibrator_start(vibrator); + else + gpio_vibrator_stop(vibrator); +} + +static int gpio_vibrator_play_effect(struct input_dev *dev, void *data, + struct ff_effect *effect) +{ + struct gpio_vibrator *vibrator = input_get_drvdata(dev); + int level; + + level = effect->u.rumble.strong_magnitude; + if (!level) + level = effect->u.rumble.weak_magnitude; + + vibrator->running = level; + schedule_work(&vibrator->play_work); + + return 0; +} + +static void gpio_vibrator_close(struct input_dev *input) +{ + struct gpio_vibrator *vibrator = input_get_drvdata(input); + + cancel_work_sync(&vibrator->play_work); + gpio_vibrator_stop(vibrator); + vibrator->running = false; +} + +static int gpio_vibrator_probe(struct platform_device *pdev) +{ + struct gpio_vibrator *vibrator; + int err; + + vibrator = devm_kzalloc(&pdev->dev, sizeof(*vibrator), GFP_KERNEL); + if (!vibrator) + return -ENOMEM; + + vibrator->input = devm_input_allocate_device(&pdev->dev); + if (!vibrator->input) + return -ENOMEM; + + vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc"); + err = PTR_ERR_OR_ZERO(vibrator->vcc); + if (err) { + if (err != -EPROBE_DEFER) + dev_err(&pdev->dev, "Failed to request regulator: %d\n", + err); + return err; + } + + vibrator->gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW); + err = PTR_ERR_OR_ZERO(vibrator->gpio); + if (err) { + if (err != -EPROBE_DEFER) + dev_err(&pdev->dev, "Failed to request main gpio: %d\n", + err); + return err; + } + + INIT_WORK(&vibrator->play_work, gpio_vibrator_play_work); + + vibrator->input->name = "gpio-vibrator"; + vibrator->input->id.bustype = BUS_HOST; + vibrator->input->close = gpio_vibrator_close; + + input_set_drvdata(vibrator->input, vibrator); + input_set_capability(vibrator->input, EV_FF, FF_RUMBLE); + + err = input_ff_create_memless(vibrator->input, NULL, + gpio_vibrator_play_effect); + if (err) { + dev_err(&pdev->dev, "Couldn't create FF dev: %d\n", err); + return err; + } + + err = input_register_device(vibrator->input); + if (err) { + dev_err(&pdev->dev, "Couldn't register input dev: %d\n", err); + return err; + } + + platform_set_drvdata(pdev, vibrator); + + return 0; +} + +static int __maybe_unused gpio_vibrator_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_vibrator *vibrator = platform_get_drvdata(pdev); + + cancel_work_sync(&vibrator->play_work); + if (vibrator->running) + gpio_vibrator_stop(vibrator); + + return 0; +} + +static int __maybe_unused gpio_vibrator_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct gpio_vibrator *vibrator = platform_get_drvdata(pdev); + + if (vibrator->running) + gpio_vibrator_start(vibrator); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(gpio_vibrator_pm_ops, + gpio_vibrator_suspend, gpio_vibrator_resume); + +#ifdef CONFIG_OF +static const struct of_device_id gpio_vibra_dt_match_table[] = { + { .compatible = "gpio-vibrator" }, + {} +}; +MODULE_DEVICE_TABLE(of, gpio_vibra_dt_match_table); +#endif + +static struct platform_driver gpio_vibrator_driver = { + .probe = gpio_vibrator_probe, + .driver = { + .name = "gpio-vibrator", + .pm = &gpio_vibrator_pm_ops, + .of_match_table = of_match_ptr(gpio_vibra_dt_match_table), + }, +}; +module_platform_driver(gpio_vibrator_driver); + +MODULE_AUTHOR("Luca Weiss <luca@z3ntu.xy>"); +MODULE_DESCRIPTION("GPIO vibrator driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:gpio-vibrator"); |