| Message ID | 1417399873-19575-2-git-send-email-jaewon02.kim@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Jaewon, On Mon, Dec 01, 2014 at 11:11:12AM +0900, Jaewon Kim wrote: > This patch adds support for haptic driver controlled by > voltage of regulator. And this driver support for > Force Feedback interface from input framework > > Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> > Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com> > Acked-by: Kyungmin Park <kyungmin.park@samsung.com> > Tested-by: Chanwoo Choi <cw00.choi@samsung.com> > Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> > Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com> > --- > .../devicetree/bindings/input/regulator-haptic.txt | 21 ++ > drivers/input/misc/Kconfig | 11 + > drivers/input/misc/Makefile | 1 + > drivers/input/misc/regulator-haptic.c | 247 ++++++++++++++++++++ > include/linux/input/regulator-haptic.h | 31 +++ > 5 files changed, 311 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt > create mode 100644 drivers/input/misc/regulator-haptic.c > create mode 100644 include/linux/input/regulator-haptic.h > > diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt > new file mode 100644 > index 0000000..3ed1c7e > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt > @@ -0,0 +1,21 @@ > +* Regulator Haptic Device Tree Bindings > + > +Required Properties: > + - compatible : Should be "regulator-haptic" > + - haptic-supply : Power supply to the haptic motor. > + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt > + > + - max-microvolt : The maximum voltage value supplied to the haptic motor. > + [The unit of the voltage is a micro] > + > + - min-microvolt : The minimum voltage value supplied to the haptic motor. > + [The unit of the voltage is a micro] > + > +Example: > + > + haptics { > + compatible = "regulator-haptic"; > + haptic-supply = <&motor_regulator>; > + max-microvolt = <2700000>; > + min-microvolt = <1100000>; > + }; > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig > index 23297ab..e5e556d 100644 > --- a/drivers/input/misc/Kconfig > +++ b/drivers/input/misc/Kconfig > @@ -394,6 +394,17 @@ config INPUT_CM109 > To compile this driver as a module, choose M here: the module will be > called cm109. > > +config INPUT_REGULATOR_HAPTIC > + tristate "regulator haptics support" > + select INPUT_FF_MEMLESS > + help > + This option enables device driver support for the haptic controlled > + by regulator. This driver supports ff-memless interface > + from input framework. > + > + To compile this driver as a module, choose M here: the > + module will be called regulator-haptic. > + > config INPUT_RETU_PWRBUTTON > tristate "Retu Power button Driver" > depends on MFD_RETU > diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile > index 19c7603..1f135af 100644 > --- a/drivers/input/misc/Makefile > +++ b/drivers/input/misc/Makefile > @@ -53,6 +53,7 @@ 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_RB532_BUTTON) += rb532_button.o > +obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o > obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o > obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o > obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o > diff --git a/drivers/input/misc/regulator-haptic.c b/drivers/input/misc/regulator-haptic.c > new file mode 100644 > index 0000000..6bc8e45 > --- /dev/null > +++ b/drivers/input/misc/regulator-haptic.c > @@ -0,0 +1,247 @@ > +/* > + * Regulator haptic driver > + * > + * Copyright (c) 2014 Samsung Electronics Co., Ltd. > + * Author: Jaewon Kim <jaewon02.kim@samsung.com> > + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> > + * > + * 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 <linux/input.h> > +#include <linux/input/regulator-haptic.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/regulator/consumer.h> > +#include <linux/slab.h> > + > +#define MAX_MAGNITUDE_SHIFT 16 > + > +struct regulator_haptic { > + struct device *dev; > + struct input_dev *input_dev; > + struct regulator *regulator; > + struct work_struct work; > + > + bool enabled; > + bool suspend_state; > + unsigned int max_volt; > + unsigned int min_volt; > + unsigned int intensity; > + unsigned int magnitude; > +}; > + > +static void regulator_haptic_enable(struct regulator_haptic *haptic, bool state) > +{ > + int error; > + > + if (haptic->enabled == state) > + return; > + > + if (state) > + error = regulator_enable(haptic->regulator); > + else > + error = regulator_disable(haptic->regulator); > + if (error) { > + dev_err(haptic->dev, "cannot enable regulator\n"); > + return; > + } > + > + haptic->enabled = state; > +} > + > +static void regulator_haptic_work(struct work_struct *work) > +{ > + struct regulator_haptic *haptic = container_of(work, > + struct regulator_haptic, work); > + int error; > + > + error = regulator_set_voltage(haptic->regulator, > + haptic->intensity + haptic->min_volt, haptic->max_volt); > + if (error) { > + dev_err(haptic->dev, "cannot set regulator voltage\n"); > + return; > + } > + > + if (haptic->magnitude) > + regulator_haptic_enable(haptic, true); > + else > + regulator_haptic_enable(haptic, false); > +} > + > +static int regulator_haptic_play_effect(struct input_dev *input, void *data, > + struct ff_effect *effect) > +{ > + struct regulator_haptic *haptic = input_get_drvdata(input); > + u64 volt_mag_multi; > + > + haptic->magnitude = effect->u.rumble.strong_magnitude; > + if (!haptic->magnitude) > + haptic->magnitude = effect->u.rumble.weak_magnitude; > + > + > + volt_mag_multi = (u64)(haptic->max_volt - haptic->min_volt) * > + haptic->magnitude; > + haptic->intensity = (unsigned int)(volt_mag_multi >> > + MAX_MAGNITUDE_SHIFT); > + > + schedule_work(&haptic->work); > + > + return 0; > +} > + > +static void regulator_haptic_close(struct input_dev *input) > +{ > + struct regulator_haptic *haptic = input_get_drvdata(input); > + > + cancel_work_sync(&haptic->work); > + regulator_haptic_enable(haptic, false); > +} > + > +#ifdef CONFIG_OF > +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) > +{ > + struct device_node *node = haptic->dev->of_node; > + int error; > + > + error = of_property_read_u32(node, "max-microvolt", &haptic->max_volt); > + if (error) { > + dev_err(haptic->dev, "cannot parse max-microvolt\n"); > + return error; > + } > + > + error = of_property_read_u32(node, "min-microvolt", &haptic->min_volt); > + if (error) { > + dev_err(haptic->dev, "cannot parse min-microvolt\n"); > + return error; > + } > + > + return 0; > +} > +#else > +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) > +{ > + return 0; > +} > +#endif /* CONFIG_OF */ > + > +static int regulator_haptic_probe(struct platform_device *pdev) > +{ > + struct regulator_haptic *haptic; > + struct regulator_haptic_data *data; > + struct input_dev *input_dev; > + int error; > + > + haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL); > + if (!haptic) > + return -ENOMEM; > + > + haptic->dev = &pdev->dev; > + haptic->enabled = false; > + haptic->suspend_state = false; > + INIT_WORK(&haptic->work, regulator_haptic_work); > + > + if (pdev->dev.of_node) { > + error = regulator_haptic_parse_dt(haptic); > + if (error) { > + dev_err(&pdev->dev, "failed to parse device tree\n"); > + return error; > + } > + } else { > + data = dev_get_platdata(&pdev->dev); > + if (data) { > + dev_err(&pdev->dev, "failed to get platdata\n"); > + return -EINVAL; > + } > + > + haptic->regulator = data->regulator; > + haptic->max_volt = data->max_volt; > + haptic->min_volt = data->min_volt; Please give preference to platform data if supplied, and if not then try fetching settings from device tree. > + } > + > + haptic->regulator = devm_regulator_get_exclusive(&pdev->dev, "haptic"); > + if (IS_ERR(haptic->regulator)) { > + dev_err(&pdev->dev, "failed to get regulator\n"); > + return PTR_ERR(haptic->regulator); > + } > + > + input_dev = devm_input_allocate_device(&pdev->dev); > + if (!input_dev) > + return -ENOMEM; > + > + haptic->input_dev = input_dev; > + haptic->input_dev->name = "regulator-haptic"; > + haptic->input_dev->dev.parent = &pdev->dev; > + haptic->input_dev->close = regulator_haptic_close; > + input_set_drvdata(haptic->input_dev, haptic); > + input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE); > + > + error = input_ff_create_memless(input_dev, NULL, > + regulator_haptic_play_effect); > + if (error) { > + dev_err(&pdev->dev, "failed to create force-feedback\n"); > + return error; > + } > + > + error = input_register_device(haptic->input_dev); > + if (error) { > + dev_err(&pdev->dev, "failed to register input device\n"); > + return error; > + } > + > + platform_set_drvdata(pdev, haptic); > + > + return 0; > +} > + > +static int __maybe_unused regulator_haptic_suspend(struct device *dev) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct regulator_haptic *haptic = platform_get_drvdata(pdev); > + > + if (haptic->enabled) { You need to protect this code from racing with the work item. > + regulator_haptic_enable(haptic, false); > + haptic->suspend_state = true; > + } > + > + return 0; > +} > + > +static int __maybe_unused regulator_haptic_resume(struct device *dev) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct regulator_haptic *haptic = platform_get_drvdata(pdev); > + > + if (haptic->suspend_state) { > + regulator_haptic_enable(haptic, true); > + haptic->suspend_state = false; > + } > + > + return 0; > +} > + > +static SIMPLE_DEV_PM_OPS(regulator_haptic_pm_ops, > + regulator_haptic_suspend, regulator_haptic_resume); > + > +static struct of_device_id regulator_haptic_dt_match[] = { > + { .compatible = "regulator-haptic" }, > + { /* sentinel */ }, > +}; > + > +static struct platform_driver regulator_haptic_driver = { > + .probe = regulator_haptic_probe, > + .driver = { > + .name = "regulator-haptic", > + .of_match_table = regulator_haptic_dt_match, > + .pm = ®ulator_haptic_pm_ops, > + }, > +}; > +module_platform_driver(regulator_haptic_driver); > + > +MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); > +MODULE_AUTHOR("Hyunhee Kim <hyunhee.kim@samsung.com>"); > +MODULE_DESCRIPTION("Regulator haptic driver"); > +MODULE_LICENSE("GPL"); > diff --git a/include/linux/input/regulator-haptic.h b/include/linux/input/regulator-haptic.h > new file mode 100644 > index 0000000..05ae038 > --- /dev/null > +++ b/include/linux/input/regulator-haptic.h > @@ -0,0 +1,31 @@ > +/* > + * Regulator Haptic Platform Data > + * > + * Copyright (c) 2014 Samsung Electronics Co., Ltd. > + * Author: Jaewon Kim <jaewon02.kim@samsung.com> > + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> > + * > + * 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. > + */ > + > +#ifndef _REGULATOR_HAPTIC_H > +#define _REGULATOR_HAPTIC_H > + > +/* > + * struct regulator_haptic_data - Platform device data > + * > + * @regulator: Power supply to the haptic motor > + * @max_volt: maximum voltage value supplied to the haptic motor. > + * <The unit of the voltage is a micro> > + * @min_volt: minimum voltage value supplied to the haptic motor. > + * <The unit of the voltage is a micro> > + */ > +struct regulator_haptic_data { > + struct regulator *regulator; > + unsigned int max_volt; > + unsigned int min_volt; > +}; > + > +#endif /* _REGULATOR_HAPTIC_H */ > -- > 1.7.9.5 > Thanks.
Hi Dmitry, 2014? 12? 03? 15:02? Dmitry Torokhov ?(?) ? ?: > Hi Jaewon, > > On Mon, Dec 01, 2014 at 11:11:12AM +0900, Jaewon Kim wrote: >> This patch adds support for haptic driver controlled by >> voltage of regulator. And this driver support for >> Force Feedback interface from input framework >> >> Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> >> Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com> >> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> >> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> >> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> >> Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com> >> --- >> .../devicetree/bindings/input/regulator-haptic.txt | 21 ++ >> drivers/input/misc/Kconfig | 11 + >> drivers/input/misc/Makefile | 1 + >> drivers/input/misc/regulator-haptic.c | 247 ++++++++++++++++++++ >> include/linux/input/regulator-haptic.h | 31 +++ >> 5 files changed, 311 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt >> create mode 100644 drivers/input/misc/regulator-haptic.c >> create mode 100644 include/linux/input/regulator-haptic.h >> >> diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt >> new file mode 100644 >> index 0000000..3ed1c7e >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt >> @@ -0,0 +1,21 @@ >> +* Regulator Haptic Device Tree Bindings >> + >> +Required Properties: >> + - compatible : Should be "regulator-haptic" >> + - haptic-supply : Power supply to the haptic motor. >> + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt >> + >> + - max-microvolt : The maximum voltage value supplied to the haptic motor. >> + [The unit of the voltage is a micro] >> + >> + - min-microvolt : The minimum voltage value supplied to the haptic motor. >> + [The unit of the voltage is a micro] >> + >> +Example: >> + >> + haptics { >> + compatible = "regulator-haptic"; >> + haptic-supply = <&motor_regulator>; >> + max-microvolt = <2700000>; >> + min-microvolt = <1100000>; >> + }; >> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig >> index 23297ab..e5e556d 100644 >> --- a/drivers/input/misc/Kconfig >> +++ b/drivers/input/misc/Kconfig >> @@ -394,6 +394,17 @@ config INPUT_CM109 >> To compile this driver as a module, choose M here: the module will be >> called cm109. >> >> +config INPUT_REGULATOR_HAPTIC >> + tristate "regulator haptics support" >> + select INPUT_FF_MEMLESS >> + help >> + This option enables device driver support for the haptic controlled >> + by regulator. This driver supports ff-memless interface >> + from input framework. >> + >> + To compile this driver as a module, choose M here: the >> + module will be called regulator-haptic. >> + >> config INPUT_RETU_PWRBUTTON >> tristate "Retu Power button Driver" >> depends on MFD_RETU >> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile >> index 19c7603..1f135af 100644 >> --- a/drivers/input/misc/Makefile >> +++ b/drivers/input/misc/Makefile >> @@ -53,6 +53,7 @@ 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_RB532_BUTTON) += rb532_button.o >> +obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o >> obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o >> obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o >> obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o >> diff --git a/drivers/input/misc/regulator-haptic.c b/drivers/input/misc/regulator-haptic.c >> new file mode 100644 >> index 0000000..6bc8e45 >> --- /dev/null >> +++ b/drivers/input/misc/regulator-haptic.c >> @@ -0,0 +1,247 @@ >> +/* >> + * Regulator haptic driver >> + * >> + * Copyright (c) 2014 Samsung Electronics Co., Ltd. >> + * Author: Jaewon Kim <jaewon02.kim@samsung.com> >> + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> >> + * >> + * 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 <linux/input.h> >> +#include <linux/input/regulator-haptic.h> >> +#include <linux/module.h> >> +#include <linux/of.h> >> +#include <linux/platform_device.h> >> +#include <linux/regulator/consumer.h> >> +#include <linux/slab.h> >> + >> +#define MAX_MAGNITUDE_SHIFT 16 >> + >> +struct regulator_haptic { >> + struct device *dev; >> + struct input_dev *input_dev; >> + struct regulator *regulator; >> + struct work_struct work; >> + >> + bool enabled; >> + bool suspend_state; >> + unsigned int max_volt; >> + unsigned int min_volt; >> + unsigned int intensity; >> + unsigned int magnitude; >> +}; >> + >> +static void regulator_haptic_enable(struct regulator_haptic *haptic, bool state) >> +{ >> + int error; >> + >> + if (haptic->enabled == state) >> + return; >> + >> + if (state) >> + error = regulator_enable(haptic->regulator); >> + else >> + error = regulator_disable(haptic->regulator); >> + if (error) { >> + dev_err(haptic->dev, "cannot enable regulator\n"); >> + return; >> + } >> + >> + haptic->enabled = state; >> +} >> + >> +static void regulator_haptic_work(struct work_struct *work) >> +{ >> + struct regulator_haptic *haptic = container_of(work, >> + struct regulator_haptic, work); >> + int error; >> + >> + error = regulator_set_voltage(haptic->regulator, >> + haptic->intensity + haptic->min_volt, haptic->max_volt); >> + if (error) { >> + dev_err(haptic->dev, "cannot set regulator voltage\n"); >> + return; >> + } >> + >> + if (haptic->magnitude) >> + regulator_haptic_enable(haptic, true); >> + else >> + regulator_haptic_enable(haptic, false); >> +} >> + >> +static int regulator_haptic_play_effect(struct input_dev *input, void *data, >> + struct ff_effect *effect) >> +{ >> + struct regulator_haptic *haptic = input_get_drvdata(input); >> + u64 volt_mag_multi; >> + >> + haptic->magnitude = effect->u.rumble.strong_magnitude; >> + if (!haptic->magnitude) >> + haptic->magnitude = effect->u.rumble.weak_magnitude; >> + >> + >> + volt_mag_multi = (u64)(haptic->max_volt - haptic->min_volt) * >> + haptic->magnitude; >> + haptic->intensity = (unsigned int)(volt_mag_multi >> >> + MAX_MAGNITUDE_SHIFT); >> + >> + schedule_work(&haptic->work); >> + >> + return 0; >> +} >> + >> +static void regulator_haptic_close(struct input_dev *input) >> +{ >> + struct regulator_haptic *haptic = input_get_drvdata(input); >> + >> + cancel_work_sync(&haptic->work); >> + regulator_haptic_enable(haptic, false); >> +} >> + >> +#ifdef CONFIG_OF >> +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) >> +{ >> + struct device_node *node = haptic->dev->of_node; >> + int error; >> + >> + error = of_property_read_u32(node, "max-microvolt", &haptic->max_volt); >> + if (error) { >> + dev_err(haptic->dev, "cannot parse max-microvolt\n"); >> + return error; >> + } >> + >> + error = of_property_read_u32(node, "min-microvolt", &haptic->min_volt); >> + if (error) { >> + dev_err(haptic->dev, "cannot parse min-microvolt\n"); >> + return error; >> + } >> + >> + return 0; >> +} >> +#else >> +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) >> +{ >> + return 0; >> +} >> +#endif /* CONFIG_OF */ >> + >> +static int regulator_haptic_probe(struct platform_device *pdev) >> +{ >> + struct regulator_haptic *haptic; >> + struct regulator_haptic_data *data; >> + struct input_dev *input_dev; >> + int error; >> + >> + haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL); >> + if (!haptic) >> + return -ENOMEM; >> + >> + haptic->dev = &pdev->dev; >> + haptic->enabled = false; >> + haptic->suspend_state = false; >> + INIT_WORK(&haptic->work, regulator_haptic_work); >> + >> + if (pdev->dev.of_node) { >> + error = regulator_haptic_parse_dt(haptic); >> + if (error) { >> + dev_err(&pdev->dev, "failed to parse device tree\n"); >> + return error; >> + } >> + } else { >> + data = dev_get_platdata(&pdev->dev); >> + if (data) { >> + dev_err(&pdev->dev, "failed to get platdata\n"); >> + return -EINVAL; >> + } >> + >> + haptic->regulator = data->regulator; >> + haptic->max_volt = data->max_volt; >> + haptic->min_volt = data->min_volt; > Please give preference to platform data if supplied, and if not then try > fetching settings from device tree. Ok. i will give prefrence to platform data in next version. > >> + } >> + >> + haptic->regulator = devm_regulator_get_exclusive(&pdev->dev, "haptic"); >> + if (IS_ERR(haptic->regulator)) { >> + dev_err(&pdev->dev, "failed to get regulator\n"); >> + return PTR_ERR(haptic->regulator); >> + } >> + >> + input_dev = devm_input_allocate_device(&pdev->dev); >> + if (!input_dev) >> + return -ENOMEM; >> + >> + haptic->input_dev = input_dev; >> + haptic->input_dev->name = "regulator-haptic"; >> + haptic->input_dev->dev.parent = &pdev->dev; >> + haptic->input_dev->close = regulator_haptic_close; >> + input_set_drvdata(haptic->input_dev, haptic); >> + input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE); >> + >> + error = input_ff_create_memless(input_dev, NULL, >> + regulator_haptic_play_effect); >> + if (error) { >> + dev_err(&pdev->dev, "failed to create force-feedback\n"); >> + return error; >> + } >> + >> + error = input_register_device(haptic->input_dev); >> + if (error) { >> + dev_err(&pdev->dev, "failed to register input device\n"); >> + return error; >> + } >> + >> + platform_set_drvdata(pdev, haptic); >> + >> + return 0; >> +} >> + >> +static int __maybe_unused regulator_haptic_suspend(struct device *dev) >> +{ >> + struct platform_device *pdev = to_platform_device(dev); >> + struct regulator_haptic *haptic = platform_get_drvdata(pdev); >> + >> + if (haptic->enabled) { > You need to protect this code from racing with the work item. > >> + regulator_haptic_enable(haptic, false); >> + haptic->suspend_state = true; >> + } >> + >> + return 0; >> +} >> + >> +static int __maybe_unused regulator_haptic_resume(struct device *dev) >> +{ >> + struct platform_device *pdev = to_platform_device(dev); >> + struct regulator_haptic *haptic = platform_get_drvdata(pdev); >> + >> + if (haptic->suspend_state) { >> + regulator_haptic_enable(haptic, true); >> + haptic->suspend_state = false; >> + } >> + >> + return 0; >> +} >> + >> +static SIMPLE_DEV_PM_OPS(regulator_haptic_pm_ops, >> + regulator_haptic_suspend, regulator_haptic_resume); >> + >> +static struct of_device_id regulator_haptic_dt_match[] = { >> + { .compatible = "regulator-haptic" }, >> + { /* sentinel */ }, >> +}; >> + >> +static struct platform_driver regulator_haptic_driver = { >> + .probe = regulator_haptic_probe, >> + .driver = { >> + .name = "regulator-haptic", >> + .of_match_table = regulator_haptic_dt_match, >> + .pm = ®ulator_haptic_pm_ops, >> + }, >> +}; >> +module_platform_driver(regulator_haptic_driver); >> + >> +MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); >> +MODULE_AUTHOR("Hyunhee Kim <hyunhee.kim@samsung.com>"); >> +MODULE_DESCRIPTION("Regulator haptic driver"); >> +MODULE_LICENSE("GPL"); >> diff --git a/include/linux/input/regulator-haptic.h b/include/linux/input/regulator-haptic.h >> new file mode 100644 >> index 0000000..05ae038 >> --- /dev/null >> +++ b/include/linux/input/regulator-haptic.h >> @@ -0,0 +1,31 @@ >> +/* >> + * Regulator Haptic Platform Data >> + * >> + * Copyright (c) 2014 Samsung Electronics Co., Ltd. >> + * Author: Jaewon Kim <jaewon02.kim@samsung.com> >> + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> >> + * >> + * 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. >> + */ >> + >> +#ifndef _REGULATOR_HAPTIC_H >> +#define _REGULATOR_HAPTIC_H >> + >> +/* >> + * struct regulator_haptic_data - Platform device data >> + * >> + * @regulator: Power supply to the haptic motor >> + * @max_volt: maximum voltage value supplied to the haptic motor. >> + * <The unit of the voltage is a micro> >> + * @min_volt: minimum voltage value supplied to the haptic motor. >> + * <The unit of the voltage is a micro> >> + */ >> +struct regulator_haptic_data { >> + struct regulator *regulator; >> + unsigned int max_volt; >> + unsigned int min_volt; >> +}; >> + >> +#endif /* _REGULATOR_HAPTIC_H */ >> -- >> 1.7.9.5 >> > Thanks. > Thanks. Jaewon Kim. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Dmity, 2014? 12? 03? 15:29? Jaewon Kim ?(?) ? ?: > Hi Dmitry, > > 2014? 12? 03? 15:02? Dmitry Torokhov ?(?) ? ?: >> Hi Jaewon, >> >> On Mon, Dec 01, 2014 at 11:11:12AM +0900, Jaewon Kim wrote: >>> This patch adds support for haptic driver controlled by >>> voltage of regulator. And this driver support for >>> Force Feedback interface from input framework >>> >>> Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> >>> Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com> >>> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> >>> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> >>> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> >>> Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com> >>> --- >>> .../devicetree/bindings/input/regulator-haptic.txt | 21 ++ >>> drivers/input/misc/Kconfig | 11 + >>> drivers/input/misc/Makefile | 1 + >>> drivers/input/misc/regulator-haptic.c | 247 >>> ++++++++++++++++++++ >>> include/linux/input/regulator-haptic.h | 31 +++ >>> 5 files changed, 311 insertions(+) >>> create mode 100644 >>> Documentation/devicetree/bindings/input/regulator-haptic.txt >>> create mode 100644 drivers/input/misc/regulator-haptic.c >>> create mode 100644 include/linux/input/regulator-haptic.h >>> >>> diff --git >>> a/Documentation/devicetree/bindings/input/regulator-haptic.txt >>> b/Documentation/devicetree/bindings/input/regulator-haptic.txt >>> new file mode 100644 >>> index 0000000..3ed1c7e >>> --- /dev/null >>> +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt >>> @@ -0,0 +1,21 @@ >>> +* Regulator Haptic Device Tree Bindings >>> + >>> +Required Properties: >>> + - compatible : Should be "regulator-haptic" >>> + - haptic-supply : Power supply to the haptic motor. >>> + [*] refer >>> Documentation/devicetree/bindings/regulator/regulator.txt >>> + >>> + - max-microvolt : The maximum voltage value supplied to the haptic >>> motor. >>> + [The unit of the voltage is a micro] >>> + >>> + - min-microvolt : The minimum voltage value supplied to the haptic >>> motor. >>> + [The unit of the voltage is a micro] >>> + >>> +Example: >>> + >>> + haptics { >>> + compatible = "regulator-haptic"; >>> + haptic-supply = <&motor_regulator>; >>> + max-microvolt = <2700000>; >>> + min-microvolt = <1100000>; >>> + }; >>> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig >>> index 23297ab..e5e556d 100644 >>> --- a/drivers/input/misc/Kconfig >>> +++ b/drivers/input/misc/Kconfig >>> @@ -394,6 +394,17 @@ config INPUT_CM109 >>> To compile this driver as a module, choose M here: the >>> module will be >>> called cm109. >>> +config INPUT_REGULATOR_HAPTIC >>> + tristate "regulator haptics support" >>> + select INPUT_FF_MEMLESS >>> + help >>> + This option enables device driver support for the haptic >>> controlled >>> + by regulator. This driver supports ff-memless interface >>> + from input framework. >>> + >>> + To compile this driver as a module, choose M here: the >>> + module will be called regulator-haptic. >>> + >>> config INPUT_RETU_PWRBUTTON >>> tristate "Retu Power button Driver" >>> depends on MFD_RETU >>> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile >>> index 19c7603..1f135af 100644 >>> --- a/drivers/input/misc/Makefile >>> +++ b/drivers/input/misc/Makefile >>> @@ -53,6 +53,7 @@ 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_RB532_BUTTON) += rb532_button.o >>> +obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o >>> obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o >>> obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o >>> obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o >>> diff --git a/drivers/input/misc/regulator-haptic.c >>> b/drivers/input/misc/regulator-haptic.c >>> new file mode 100644 >>> index 0000000..6bc8e45 >>> --- /dev/null >>> +++ b/drivers/input/misc/regulator-haptic.c >>> @@ -0,0 +1,247 @@ >>> +/* >>> + * Regulator haptic driver >>> + * >>> + * Copyright (c) 2014 Samsung Electronics Co., Ltd. >>> + * Author: Jaewon Kim <jaewon02.kim@samsung.com> >>> + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> >>> + * >>> + * 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 <linux/input.h> >>> +#include <linux/input/regulator-haptic.h> >>> +#include <linux/module.h> >>> +#include <linux/of.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/regulator/consumer.h> >>> +#include <linux/slab.h> >>> + >>> +#define MAX_MAGNITUDE_SHIFT 16 >>> + >>> +struct regulator_haptic { >>> + struct device *dev; >>> + struct input_dev *input_dev; >>> + struct regulator *regulator; >>> + struct work_struct work; >>> + >>> + bool enabled; >>> + bool suspend_state; >>> + unsigned int max_volt; >>> + unsigned int min_volt; >>> + unsigned int intensity; >>> + unsigned int magnitude; >>> +}; >>> + >>> +static void regulator_haptic_enable(struct regulator_haptic >>> *haptic, bool state) >>> +{ >>> + int error; >>> + >>> + if (haptic->enabled == state) >>> + return; >>> + >>> + if (state) >>> + error = regulator_enable(haptic->regulator); >>> + else >>> + error = regulator_disable(haptic->regulator); >>> + if (error) { >>> + dev_err(haptic->dev, "cannot enable regulator\n"); >>> + return; >>> + } >>> + >>> + haptic->enabled = state; >>> +} >>> + >>> +static void regulator_haptic_work(struct work_struct *work) >>> +{ >>> + struct regulator_haptic *haptic = container_of(work, >>> + struct regulator_haptic, work); >>> + int error; >>> + >>> + error = regulator_set_voltage(haptic->regulator, >>> + haptic->intensity + haptic->min_volt, haptic->max_volt); >>> + if (error) { >>> + dev_err(haptic->dev, "cannot set regulator voltage\n"); >>> + return; >>> + } >>> + >>> + if (haptic->magnitude) >>> + regulator_haptic_enable(haptic, true); >>> + else >>> + regulator_haptic_enable(haptic, false); >>> +} >>> + >>> +static int regulator_haptic_play_effect(struct input_dev *input, >>> void *data, >>> + struct ff_effect *effect) >>> +{ >>> + struct regulator_haptic *haptic = input_get_drvdata(input); >>> + u64 volt_mag_multi; >>> + >>> + haptic->magnitude = effect->u.rumble.strong_magnitude; >>> + if (!haptic->magnitude) >>> + haptic->magnitude = effect->u.rumble.weak_magnitude; >>> + >>> + >>> + volt_mag_multi = (u64)(haptic->max_volt - haptic->min_volt) * >>> + haptic->magnitude; >>> + haptic->intensity = (unsigned int)(volt_mag_multi >> >>> + MAX_MAGNITUDE_SHIFT); >>> + >>> + schedule_work(&haptic->work); >>> + >>> + return 0; >>> +} >>> + >>> +static void regulator_haptic_close(struct input_dev *input) >>> +{ >>> + struct regulator_haptic *haptic = input_get_drvdata(input); >>> + >>> + cancel_work_sync(&haptic->work); >>> + regulator_haptic_enable(haptic, false); >>> +} >>> + >>> +#ifdef CONFIG_OF >>> +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) >>> +{ >>> + struct device_node *node = haptic->dev->of_node; >>> + int error; >>> + >>> + error = of_property_read_u32(node, "max-microvolt", >>> &haptic->max_volt); >>> + if (error) { >>> + dev_err(haptic->dev, "cannot parse max-microvolt\n"); >>> + return error; >>> + } >>> + >>> + error = of_property_read_u32(node, "min-microvolt", >>> &haptic->min_volt); >>> + if (error) { >>> + dev_err(haptic->dev, "cannot parse min-microvolt\n"); >>> + return error; >>> + } >>> + >>> + return 0; >>> +} >>> +#else >>> +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) >>> +{ >>> + return 0; >>> +} >>> +#endif /* CONFIG_OF */ >>> + >>> +static int regulator_haptic_probe(struct platform_device *pdev) >>> +{ >>> + struct regulator_haptic *haptic; >>> + struct regulator_haptic_data *data; >>> + struct input_dev *input_dev; >>> + int error; >>> + >>> + haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL); >>> + if (!haptic) >>> + return -ENOMEM; >>> + >>> + haptic->dev = &pdev->dev; >>> + haptic->enabled = false; >>> + haptic->suspend_state = false; >>> + INIT_WORK(&haptic->work, regulator_haptic_work); >>> + >>> + if (pdev->dev.of_node) { >>> + error = regulator_haptic_parse_dt(haptic); >>> + if (error) { >>> + dev_err(&pdev->dev, "failed to parse device tree\n"); >>> + return error; >>> + } >>> + } else { >>> + data = dev_get_platdata(&pdev->dev); >>> + if (data) { >>> + dev_err(&pdev->dev, "failed to get platdata\n"); >>> + return -EINVAL; >>> + } >>> + >>> + haptic->regulator = data->regulator; >>> + haptic->max_volt = data->max_volt; >>> + haptic->min_volt = data->min_volt; >> Please give preference to platform data if supplied, and if not then try >> fetching settings from device tree. > > Ok. i will give prefrence to platform data in next version. > >> >>> + } >>> + >>> + haptic->regulator = devm_regulator_get_exclusive(&pdev->dev, >>> "haptic"); >>> + if (IS_ERR(haptic->regulator)) { >>> + dev_err(&pdev->dev, "failed to get regulator\n"); >>> + return PTR_ERR(haptic->regulator); >>> + } >>> + >>> + input_dev = devm_input_allocate_device(&pdev->dev); >>> + if (!input_dev) >>> + return -ENOMEM; >>> + >>> + haptic->input_dev = input_dev; >>> + haptic->input_dev->name = "regulator-haptic"; >>> + haptic->input_dev->dev.parent = &pdev->dev; >>> + haptic->input_dev->close = regulator_haptic_close; >>> + input_set_drvdata(haptic->input_dev, haptic); >>> + input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE); >>> + >>> + error = input_ff_create_memless(input_dev, NULL, >>> + regulator_haptic_play_effect); >>> + if (error) { >>> + dev_err(&pdev->dev, "failed to create force-feedback\n"); >>> + return error; >>> + } >>> + >>> + error = input_register_device(haptic->input_dev); >>> + if (error) { >>> + dev_err(&pdev->dev, "failed to register input device\n"); >>> + return error; >>> + } >>> + >>> + platform_set_drvdata(pdev, haptic); >>> + >>> + return 0; >>> +} >>> + >>> +static int __maybe_unused regulator_haptic_suspend(struct device *dev) >>> +{ >>> + struct platform_device *pdev = to_platform_device(dev); >>> + struct regulator_haptic *haptic = platform_get_drvdata(pdev); >>> + >>> + if (haptic->enabled) { >> You need to protect this code from racing with the work item. I saw this review now but i sent v5. It did not reflect in v5. I will send soon and modifies in v6. >> >>> + regulator_haptic_enable(haptic, false); >>> + haptic->suspend_state = true; >>> + } >>> + >>> + return 0; >>> +} >>> + >>> +static int __maybe_unused regulator_haptic_resume(struct device *dev) >>> +{ >>> + struct platform_device *pdev = to_platform_device(dev); >>> + struct regulator_haptic *haptic = platform_get_drvdata(pdev); >>> + >>> + if (haptic->suspend_state) { >>> + regulator_haptic_enable(haptic, true); >>> + haptic->suspend_state = false; >>> + } >>> + >>> + return 0; >>> +} >>> + >>> +static SIMPLE_DEV_PM_OPS(regulator_haptic_pm_ops, >>> + regulator_haptic_suspend, regulator_haptic_resume); >>> + >>> +static struct of_device_id regulator_haptic_dt_match[] = { >>> + { .compatible = "regulator-haptic" }, >>> + { /* sentinel */ }, >>> +}; >>> + >>> +static struct platform_driver regulator_haptic_driver = { >>> + .probe = regulator_haptic_probe, >>> + .driver = { >>> + .name = "regulator-haptic", >>> + .of_match_table = regulator_haptic_dt_match, >>> + .pm = ®ulator_haptic_pm_ops, >>> + }, >>> +}; >>> +module_platform_driver(regulator_haptic_driver); >>> + >>> +MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); >>> +MODULE_AUTHOR("Hyunhee Kim <hyunhee.kim@samsung.com>"); >>> +MODULE_DESCRIPTION("Regulator haptic driver"); >>> +MODULE_LICENSE("GPL"); >>> diff --git a/include/linux/input/regulator-haptic.h >>> b/include/linux/input/regulator-haptic.h >>> new file mode 100644 >>> index 0000000..05ae038 >>> --- /dev/null >>> +++ b/include/linux/input/regulator-haptic.h >>> @@ -0,0 +1,31 @@ >>> +/* >>> + * Regulator Haptic Platform Data >>> + * >>> + * Copyright (c) 2014 Samsung Electronics Co., Ltd. >>> + * Author: Jaewon Kim <jaewon02.kim@samsung.com> >>> + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> >>> + * >>> + * 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. >>> + */ >>> + >>> +#ifndef _REGULATOR_HAPTIC_H >>> +#define _REGULATOR_HAPTIC_H >>> + >>> +/* >>> + * struct regulator_haptic_data - Platform device data >>> + * >>> + * @regulator: Power supply to the haptic motor >>> + * @max_volt: maximum voltage value supplied to the haptic motor. >>> + * <The unit of the voltage is a micro> >>> + * @min_volt: minimum voltage value supplied to the haptic motor. >>> + * <The unit of the voltage is a micro> >>> + */ >>> +struct regulator_haptic_data { >>> + struct regulator *regulator; >>> + unsigned int max_volt; >>> + unsigned int min_volt; >>> +}; >>> + >>> +#endif /* _REGULATOR_HAPTIC_H */ >>> -- >>> 1.7.9.5 >>> >> Thanks. >> > > Thanks. > Jaewon Kim. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt new file mode 100644 index 0000000..3ed1c7e --- /dev/null +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt @@ -0,0 +1,21 @@ +* Regulator Haptic Device Tree Bindings + +Required Properties: + - compatible : Should be "regulator-haptic" + - haptic-supply : Power supply to the haptic motor. + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt + + - max-microvolt : The maximum voltage value supplied to the haptic motor. + [The unit of the voltage is a micro] + + - min-microvolt : The minimum voltage value supplied to the haptic motor. + [The unit of the voltage is a micro] + +Example: + + haptics { + compatible = "regulator-haptic"; + haptic-supply = <&motor_regulator>; + max-microvolt = <2700000>; + min-microvolt = <1100000>; + }; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 23297ab..e5e556d 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -394,6 +394,17 @@ config INPUT_CM109 To compile this driver as a module, choose M here: the module will be called cm109. +config INPUT_REGULATOR_HAPTIC + tristate "regulator haptics support" + select INPUT_FF_MEMLESS + help + This option enables device driver support for the haptic controlled + by regulator. This driver supports ff-memless interface + from input framework. + + To compile this driver as a module, choose M here: the + module will be called regulator-haptic. + config INPUT_RETU_PWRBUTTON tristate "Retu Power button Driver" depends on MFD_RETU diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 19c7603..1f135af 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -53,6 +53,7 @@ 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_RB532_BUTTON) += rb532_button.o +obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o diff --git a/drivers/input/misc/regulator-haptic.c b/drivers/input/misc/regulator-haptic.c new file mode 100644 index 0000000..6bc8e45 --- /dev/null +++ b/drivers/input/misc/regulator-haptic.c @@ -0,0 +1,247 @@ +/* + * Regulator haptic driver + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * Author: Jaewon Kim <jaewon02.kim@samsung.com> + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> + * + * 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 <linux/input.h> +#include <linux/input/regulator-haptic.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> + +#define MAX_MAGNITUDE_SHIFT 16 + +struct regulator_haptic { + struct device *dev; + struct input_dev *input_dev; + struct regulator *regulator; + struct work_struct work; + + bool enabled; + bool suspend_state; + unsigned int max_volt; + unsigned int min_volt; + unsigned int intensity; + unsigned int magnitude; +}; + +static void regulator_haptic_enable(struct regulator_haptic *haptic, bool state) +{ + int error; + + if (haptic->enabled == state) + return; + + if (state) + error = regulator_enable(haptic->regulator); + else + error = regulator_disable(haptic->regulator); + if (error) { + dev_err(haptic->dev, "cannot enable regulator\n"); + return; + } + + haptic->enabled = state; +} + +static void regulator_haptic_work(struct work_struct *work) +{ + struct regulator_haptic *haptic = container_of(work, + struct regulator_haptic, work); + int error; + + error = regulator_set_voltage(haptic->regulator, + haptic->intensity + haptic->min_volt, haptic->max_volt); + if (error) { + dev_err(haptic->dev, "cannot set regulator voltage\n"); + return; + } + + if (haptic->magnitude) + regulator_haptic_enable(haptic, true); + else + regulator_haptic_enable(haptic, false); +} + +static int regulator_haptic_play_effect(struct input_dev *input, void *data, + struct ff_effect *effect) +{ + struct regulator_haptic *haptic = input_get_drvdata(input); + u64 volt_mag_multi; + + haptic->magnitude = effect->u.rumble.strong_magnitude; + if (!haptic->magnitude) + haptic->magnitude = effect->u.rumble.weak_magnitude; + + + volt_mag_multi = (u64)(haptic->max_volt - haptic->min_volt) * + haptic->magnitude; + haptic->intensity = (unsigned int)(volt_mag_multi >> + MAX_MAGNITUDE_SHIFT); + + schedule_work(&haptic->work); + + return 0; +} + +static void regulator_haptic_close(struct input_dev *input) +{ + struct regulator_haptic *haptic = input_get_drvdata(input); + + cancel_work_sync(&haptic->work); + regulator_haptic_enable(haptic, false); +} + +#ifdef CONFIG_OF +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) +{ + struct device_node *node = haptic->dev->of_node; + int error; + + error = of_property_read_u32(node, "max-microvolt", &haptic->max_volt); + if (error) { + dev_err(haptic->dev, "cannot parse max-microvolt\n"); + return error; + } + + error = of_property_read_u32(node, "min-microvolt", &haptic->min_volt); + if (error) { + dev_err(haptic->dev, "cannot parse min-microvolt\n"); + return error; + } + + return 0; +} +#else +static int regulator_haptic_parse_dt(struct regulator_haptic *haptic) +{ + return 0; +} +#endif /* CONFIG_OF */ + +static int regulator_haptic_probe(struct platform_device *pdev) +{ + struct regulator_haptic *haptic; + struct regulator_haptic_data *data; + struct input_dev *input_dev; + int error; + + haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL); + if (!haptic) + return -ENOMEM; + + haptic->dev = &pdev->dev; + haptic->enabled = false; + haptic->suspend_state = false; + INIT_WORK(&haptic->work, regulator_haptic_work); + + if (pdev->dev.of_node) { + error = regulator_haptic_parse_dt(haptic); + if (error) { + dev_err(&pdev->dev, "failed to parse device tree\n"); + return error; + } + } else { + data = dev_get_platdata(&pdev->dev); + if (data) { + dev_err(&pdev->dev, "failed to get platdata\n"); + return -EINVAL; + } + + haptic->regulator = data->regulator; + haptic->max_volt = data->max_volt; + haptic->min_volt = data->min_volt; + } + + haptic->regulator = devm_regulator_get_exclusive(&pdev->dev, "haptic"); + if (IS_ERR(haptic->regulator)) { + dev_err(&pdev->dev, "failed to get regulator\n"); + return PTR_ERR(haptic->regulator); + } + + input_dev = devm_input_allocate_device(&pdev->dev); + if (!input_dev) + return -ENOMEM; + + haptic->input_dev = input_dev; + haptic->input_dev->name = "regulator-haptic"; + haptic->input_dev->dev.parent = &pdev->dev; + haptic->input_dev->close = regulator_haptic_close; + input_set_drvdata(haptic->input_dev, haptic); + input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE); + + error = input_ff_create_memless(input_dev, NULL, + regulator_haptic_play_effect); + if (error) { + dev_err(&pdev->dev, "failed to create force-feedback\n"); + return error; + } + + error = input_register_device(haptic->input_dev); + if (error) { + dev_err(&pdev->dev, "failed to register input device\n"); + return error; + } + + platform_set_drvdata(pdev, haptic); + + return 0; +} + +static int __maybe_unused regulator_haptic_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct regulator_haptic *haptic = platform_get_drvdata(pdev); + + if (haptic->enabled) { + regulator_haptic_enable(haptic, false); + haptic->suspend_state = true; + } + + return 0; +} + +static int __maybe_unused regulator_haptic_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct regulator_haptic *haptic = platform_get_drvdata(pdev); + + if (haptic->suspend_state) { + regulator_haptic_enable(haptic, true); + haptic->suspend_state = false; + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(regulator_haptic_pm_ops, + regulator_haptic_suspend, regulator_haptic_resume); + +static struct of_device_id regulator_haptic_dt_match[] = { + { .compatible = "regulator-haptic" }, + { /* sentinel */ }, +}; + +static struct platform_driver regulator_haptic_driver = { + .probe = regulator_haptic_probe, + .driver = { + .name = "regulator-haptic", + .of_match_table = regulator_haptic_dt_match, + .pm = ®ulator_haptic_pm_ops, + }, +}; +module_platform_driver(regulator_haptic_driver); + +MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); +MODULE_AUTHOR("Hyunhee Kim <hyunhee.kim@samsung.com>"); +MODULE_DESCRIPTION("Regulator haptic driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/input/regulator-haptic.h b/include/linux/input/regulator-haptic.h new file mode 100644 index 0000000..05ae038 --- /dev/null +++ b/include/linux/input/regulator-haptic.h @@ -0,0 +1,31 @@ +/* + * Regulator Haptic Platform Data + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * Author: Jaewon Kim <jaewon02.kim@samsung.com> + * Author: Hyunhee Kim <hyunhee.kim@samsung.com> + * + * 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. + */ + +#ifndef _REGULATOR_HAPTIC_H +#define _REGULATOR_HAPTIC_H + +/* + * struct regulator_haptic_data - Platform device data + * + * @regulator: Power supply to the haptic motor + * @max_volt: maximum voltage value supplied to the haptic motor. + * <The unit of the voltage is a micro> + * @min_volt: minimum voltage value supplied to the haptic motor. + * <The unit of the voltage is a micro> + */ +struct regulator_haptic_data { + struct regulator *regulator; + unsigned int max_volt; + unsigned int min_volt; +}; + +#endif /* _REGULATOR_HAPTIC_H */