On Fri, Jul 14, 2017 at 12:01:50PM +0200, Sebastian Reichel wrote: > Provide a simple driver for PWM controllable vibrators. > It will be used by Motorola Droid 4. > > Signed-off-by: Sebastian Reichel <[email protected]>
Applied, thank you. > --- > drivers/input/misc/Kconfig | 12 ++ > drivers/input/misc/Makefile | 1 + > drivers/input/misc/pwm-vibra.c | 267 > +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 280 insertions(+) > create mode 100644 drivers/input/misc/pwm-vibra.c > > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig > index 3872488c3fd7..7bb7285c4722 100644 > --- a/drivers/input/misc/Kconfig > +++ b/drivers/input/misc/Kconfig > @@ -581,6 +581,18 @@ config INPUT_PWM_BEEPER > To compile this driver as a module, choose M here: the module will be > called pwm-beeper. > > +config INPUT_PWM_VIBRA > + tristate "PWM vibrator support" > + depends on PWM > + depends on INPUT_FF_MEMLESS > + help > + Say Y here to get support for PWM based vibrator devices. > + > + If unsure, say N. > + > + To compile this driver as a module, choose M here: the module will be > + called pwm-vibra. > + > config INPUT_GPIO_ROTARY_ENCODER > tristate "Rotary encoders connected to GPIO pins" > depends on GPIOLIB || COMPILE_TEST > diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile > index b923a9828c88..36ea14997b40 100644 > --- a/drivers/input/misc/Makefile > +++ b/drivers/input/misc/Makefile > @@ -59,6 +59,7 @@ obj-$(CONFIG_INPUT_PM8XXX_VIBRATOR) += pm8xxx-vibrator.o > obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o > obj-$(CONFIG_INPUT_POWERMATE) += powermate.o > obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o > +obj-$(CONFIG_INPUT_PWM_VIBRA) += pwm-vibra.o > obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o > obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o > obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o > diff --git a/drivers/input/misc/pwm-vibra.c b/drivers/input/misc/pwm-vibra.c > new file mode 100644 > index 000000000000..55da191ae550 > --- /dev/null > +++ b/drivers/input/misc/pwm-vibra.c > @@ -0,0 +1,267 @@ > +/* > + * PWM vibrator driver > + * > + * Copyright (C) 2017 Collabora Ltd. > + * > + * Based on previous work from: > + * Copyright (C) 2012 Dmitry Torokhov <[email protected]> > + * > + * Based on PWM beeper driver: > + * Copyright (C) 2010, Lars-Peter Clausen <[email protected]> > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms of the GNU General Public License as published by the > + * Free Software Foundation; either version 2 of the License, or (at your > + * option) any later version. > + */ > + > +#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/pwm.h> > +#include <linux/regulator/consumer.h> > +#include <linux/slab.h> > + > +struct pwm_vibrator { > + struct input_dev *input; > + struct pwm_device *pwm; > + struct pwm_device *pwm_dir; > + struct regulator *vcc; > + > + struct work_struct play_work; > + u16 level; > + u32 direction_duty_cycle; > +}; > + > +static int pwm_vibrator_start(struct pwm_vibrator *vibrator) > +{ > + struct device *pdev = vibrator->input->dev.parent; > + struct pwm_state state; > + int err; > + > + err = regulator_enable(vibrator->vcc); > + if (err) { > + dev_err(pdev, "failed to enable regulator: %d", err); > + return err; > + } > + > + pwm_get_state(vibrator->pwm, &state); > + pwm_set_relative_duty_cycle(&state, vibrator->level, 0xffff); > + state.enabled = true; > + > + err = pwm_apply_state(vibrator->pwm, &state); > + if (err) { > + dev_err(pdev, "failed to apply pwm state: %d", err); > + return err; > + } > + > + if (vibrator->pwm_dir) { > + pwm_get_state(vibrator->pwm_dir, &state); > + state.duty_cycle = vibrator->direction_duty_cycle; > + state.enabled = true; > + > + err = pwm_apply_state(vibrator->pwm_dir, &state); > + if (err) { > + dev_err(pdev, "failed to apply dir-pwm state: %d", err); > + pwm_disable(vibrator->pwm); > + return err; > + } > + } > + > + return 0; > +} > + > +static void pwm_vibrator_stop(struct pwm_vibrator *vibrator) > +{ > + regulator_disable(vibrator->vcc); > + > + if (vibrator->pwm_dir) > + pwm_disable(vibrator->pwm_dir); > + pwm_disable(vibrator->pwm); > +} > + > +static void pwm_vibrator_play_work(struct work_struct *work) > +{ > + struct pwm_vibrator *vibrator = container_of(work, > + struct pwm_vibrator, play_work); > + > + if (vibrator->level) > + pwm_vibrator_start(vibrator); > + else > + pwm_vibrator_stop(vibrator); > +} > + > +static int pwm_vibrator_play_effect(struct input_dev *dev, void *data, > + struct ff_effect *effect) > +{ > + struct pwm_vibrator *vibrator = input_get_drvdata(dev); > + > + vibrator->level = effect->u.rumble.strong_magnitude; > + if (!vibrator->level) > + vibrator->level = effect->u.rumble.weak_magnitude; > + > + schedule_work(&vibrator->play_work); > + > + return 0; > +} > + > +static void pwm_vibrator_close(struct input_dev *input) > +{ > + struct pwm_vibrator *vibrator = input_get_drvdata(input); > + > + cancel_work_sync(&vibrator->play_work); > + pwm_vibrator_stop(vibrator); > +} > + > +static int pwm_vibrator_probe(struct platform_device *pdev) > +{ > + struct pwm_vibrator *vibrator; > + struct pwm_state state; > + 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", > + err); > + return err; > + } > + > + vibrator->pwm = devm_pwm_get(&pdev->dev, "enable"); > + err = PTR_ERR_OR_ZERO(vibrator->pwm); > + if (err) { > + if (err != -EPROBE_DEFER) > + dev_err(&pdev->dev, "Failed to request main pwm: %d", > + err); > + return err; > + } > + > + INIT_WORK(&vibrator->play_work, pwm_vibrator_play_work); > + > + /* Sync up PWM state and ensure it is off. */ > + pwm_init_state(vibrator->pwm, &state); > + state.enabled = false; > + err = pwm_apply_state(vibrator->pwm, &state); > + if (err) { > + dev_err(&pdev->dev, "failed to apply initial PWM state: %d", > + err); > + return err; > + } > + > + vibrator->pwm_dir = devm_pwm_get(&pdev->dev, "direction"); > + err = PTR_ERR_OR_ZERO(vibrator->pwm_dir); > + switch (err) { > + case 0: > + /* Sync up PWM state and ensure it is off. */ > + pwm_init_state(vibrator->pwm_dir, &state); > + state.enabled = false; > + err = pwm_apply_state(vibrator->pwm_dir, &state); > + if (err) { > + dev_err(&pdev->dev, "failed to apply initial PWM state: > %d", > + err); > + return err; > + } > + > + vibrator->direction_duty_cycle = > + pwm_get_period(vibrator->pwm_dir) / 2; > + device_property_read_u32(&pdev->dev, "direction-duty-cycle-ns", > + &vibrator->direction_duty_cycle); > + break; > + > + case -ENODATA: > + /* Direction PWM is optional */ > + vibrator->pwm_dir = NULL; > + break; > + > + default: > + dev_err(&pdev->dev, "Failed to request direction pwm: %d", err); > + /* Fall through */ > + > + case -EPROBE_DEFER: > + return err; > + } > + > + vibrator->input->name = "pwm-vibrator"; > + vibrator->input->id.bustype = BUS_HOST; > + vibrator->input->dev.parent = &pdev->dev; > + vibrator->input->close = pwm_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, > + pwm_vibrator_play_effect); > + if (err) { > + dev_err(&pdev->dev, "Couldn't create FF dev: %d", err); > + return err; > + } > + > + err = input_register_device(vibrator->input); > + if (err) { > + dev_err(&pdev->dev, "Couldn't register input dev: %d", err); > + return err; > + } > + > + platform_set_drvdata(pdev, vibrator); > + > + return 0; > +} > + > +static int __maybe_unused pwm_vibrator_suspend(struct device *dev) > +{ > + struct pwm_vibrator *vibrator = dev_get_drvdata(dev); > + > + cancel_work_sync(&vibrator->play_work); > + if (vibrator->level) > + pwm_vibrator_stop(vibrator); > + > + return 0; > +} > + > +static int __maybe_unused pwm_vibrator_resume(struct device *dev) > +{ > + struct pwm_vibrator *vibrator = dev_get_drvdata(dev); > + > + if (vibrator->level) > + pwm_vibrator_start(vibrator); > + > + return 0; > +} > + > +static SIMPLE_DEV_PM_OPS(pwm_vibrator_pm_ops, > + pwm_vibrator_suspend, pwm_vibrator_resume); > + > +#ifdef CONFIG_OF > +static const struct of_device_id pwm_vibra_dt_match_table[] = { > + { .compatible = "pwm-vibrator" }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, pwm_vibra_dt_match_table); > +#endif > + > +static struct platform_driver pwm_vibrator_driver = { > + .probe = pwm_vibrator_probe, > + .driver = { > + .name = "pwm-vibrator", > + .pm = &pwm_vibrator_pm_ops, > + .of_match_table = of_match_ptr(pwm_vibra_dt_match_table), > + }, > +}; > +module_platform_driver(pwm_vibrator_driver); > + > +MODULE_AUTHOR("Sebastian Reichel <[email protected]>"); > +MODULE_DESCRIPTION("PWM vibrator driver"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:pwm-vibrator"); > -- > 2.13.2 > -- Dmitry
