| Message ID | 1416490300-28865-2-git-send-email-jaewon02.kim@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Jaewon, On 20 November 2014 19:01, Jaewon Kim <jaewon02.kim@samsung.com> 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> > --- > .../devicetree/bindings/input/regulator-haptic.txt | 24 ++ > drivers/input/misc/Kconfig | 11 + > drivers/input/misc/Makefile | 1 + > drivers/input/misc/regulator-haptic.c | 241 ++++++++++++++++++++ > 4 files changed, 277 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt > create mode 100644 drivers/input/misc/regulator-haptic.c > > diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt > new file mode 100644 > index 0000000..9f60e17 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt > @@ -0,0 +1,24 @@ > +* Requlator Haptic Device Tree Bindings > + > +The regulator haptic driver controlled by voltage of regulator. > +This driver implemented via Force Feedback interface. > + > +Required Properties: > + - compatible : Should be "regulator-haptic" > + - haptic-supply : Power supply for the haptic motor. > + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt > + > + - max-microvolt : The maximum voltage value supplied to haptic motor. > + [The unit of the voltage is a micro] > + > + - min-microvolt : The minimum voltage value in which haptic motor reacts. > + [The unit of the voltage is a micro] > + > +Example: > + > + regulator-haptic { > + 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..1a83ecb > --- /dev/null > +++ b/drivers/input/misc/regulator-haptic.c > @@ -0,0 +1,241 @@ > +/* > + * 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/module.h> > +#include <linux/platform_device.h> > +#include <linux/input.h> > +#include <linux/slab.h> > +#include <linux/regulator/consumer.h> > +#include <linux/of.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) > +{ > + int error; > + > + if (haptic->enabled) > + return; > + > + error = regulator_enable(haptic->regulator); > + if (error) { > + dev_err(haptic->dev, "cannot enable regulator\n"); > + return; > + } > + > + haptic->enabled = true; > +} > + > +static void regulator_haptic_disable(struct regulator_haptic *haptic) > +{ > + int error; > + > + if (!haptic->enabled) > + return; > + > + error = regulator_disable(haptic->regulator); > + if (error) { > + dev_err(haptic->dev, "cannot disable regulator\n"); > + return; > + } > + > + haptic->enabled = false; > +} > + > +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); > + else > + regulator_haptic_disable(haptic); > +} > + > +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_disable(haptic); > +} > + > +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; > +} > + > +static int regulator_haptic_probe(struct platform_device *pdev) > +{ > + struct regulator_haptic *haptic; > + 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); > + > + error = regulator_haptic_parse_dt(haptic); > + if (error) { > + dev_err(&pdev->dev, "failed to parse device tree\n"); > + return error; > + } > + > + haptic->regulator = devm_regulator_get(&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_disable(haptic); > + 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->enabled) { > + regulator_haptic_enable(haptic); > + 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" }, > + {}, > +}; > + > +static struct platform_driver regulator_haptic_driver = { > + .probe = regulator_haptic_probe, > + .driver = { > + .name = "regulator-haptic", > + .owner = THIS_MODULE, .owner is no more required for drivers using module_platform_driver() Thanks, Pankaj Dubey > + .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_ALIAS("platform:regulator-haptic"); > +MODULE_DESCRIPTION("Regulator haptic driver"); > +MODULE_LICENSE("GPL"); > -- > 1.7.9.5 > > -- > 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 -- 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 On 11/20/2014 08:33 AM, Pankaj Dubey wrote: > Hi Jaewon, > > On 20 November 2014 19:01, Jaewon Kim <jaewon02.kim@samsung.com> 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> >> --- >> .../devicetree/bindings/input/regulator-haptic.txt | 24 ++ >> drivers/input/misc/Kconfig | 11 + >> drivers/input/misc/Makefile | 1 + >> drivers/input/misc/regulator-haptic.c | 241 ++++++++++++++++++++ >> 4 files changed, 277 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt >> create mode 100644 drivers/input/misc/regulator-haptic.c >> >> diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt >> new file mode 100644 >> index 0000000..9f60e17 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt >> @@ -0,0 +1,24 @@ >> +* Requlator Haptic Device Tree Bindings >> + >> +The regulator haptic driver controlled by voltage of regulator. >> +This driver implemented via Force Feedback interface. >> + >> +Required Properties: >> + - compatible : Should be "regulator-haptic" >> + - haptic-supply : Power supply for the haptic motor. >> + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt >> + >> + - max-microvolt : The maximum voltage value supplied to haptic motor. >> + [The unit of the voltage is a micro] >> + >> + - min-microvolt : The minimum voltage value in which haptic motor reacts. >> + [The unit of the voltage is a micro] >> + >> +Example: >> + >> + regulator-haptic { Should this be more about the function and not the driver name? Somehting like 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..1a83ecb >> --- /dev/null >> +++ b/drivers/input/misc/regulator-haptic.c >> @@ -0,0 +1,241 @@ >> +/* >> + * 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/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/input.h> >> +#include <linux/slab.h> >> +#include <linux/regulator/consumer.h> >> +#include <linux/of.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; I don't understand what you are tracking here. You only set it and unset this value but never do any checking >> + unsigned int max_volt; >> + unsigned int min_volt; >> + unsigned int intensity; >> + unsigned int magnitude; >> +}; >> + >> +static void regulator_haptic_enable(struct regulator_haptic *haptic) >> +{ >> + int error; >> + >> + if (haptic->enabled) >> + return; >> + >> + error = regulator_enable(haptic->regulator); >> + if (error) { >> + dev_err(haptic->dev, "cannot enable regulator\n"); >> + return; >> + } >> + >> + haptic->enabled = true; >> +} >> + >> +static void regulator_haptic_disable(struct regulator_haptic *haptic) >> +{ >> + int error; >> + >> + if (!haptic->enabled) >> + return; >> + >> + error = regulator_disable(haptic->regulator); >> + if (error) { >> + dev_err(haptic->dev, "cannot disable regulator\n"); >> + return; >> + } >> + >> + haptic->enabled = false; >> +} Can the enable/disable just be one function with an argument? Then you can centralize the check and reduce the code footprint. >> + >> +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); >> + else >> + regulator_haptic_disable(haptic); >> +} >> + >> +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_disable(haptic); >> +} >> + >> +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; >> +} >> + >> +static int regulator_haptic_probe(struct platform_device *pdev) >> +{ >> + struct regulator_haptic *haptic; >> + 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); >> + >> + error = regulator_haptic_parse_dt(haptic); Do you need platform data support for platforms that do not currently support dt? >> + if (error) { >> + dev_err(&pdev->dev, "failed to parse device tree\n"); >> + return error; >> + } >> + >> + haptic->regulator = devm_regulator_get(&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_disable(haptic); >> + 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->enabled) { >> + regulator_haptic_enable(haptic); We enable the regulator when we do the haptics work if magnitude is > 0. And during suspend haptic->enabled may get set to false if it is true so wouldn't haptic->enabled always be false here? Plus do we want to continue the haptic response when coming out of suspend state? >> + 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" }, >> + {}, >> +}; >> + >> +static struct platform_driver regulator_haptic_driver = { >> + .probe = regulator_haptic_probe, >> + .driver = { >> + .name = "regulator-haptic", >> + .owner = THIS_MODULE, > .owner is no more required for drivers using module_platform_driver() > > Thanks, > Pankaj Dubey > >> + .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_ALIAS("platform:regulator-haptic"); >> +MODULE_DESCRIPTION("Regulator haptic driver"); >> +MODULE_LICENSE("GPL"); >> -- >> 1.7.9.5 >> >> -- >> 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 > -- > To unsubscribe from this list: send the line "unsubscribe linux-input" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Pankaj, 2014? 11? 20? 23:33? Pankaj Dubey ?(?) ? ?: > Hi Jaewon, > > On 20 November 2014 19:01, Jaewon Kim <jaewon02.kim@samsung.com> 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> >> --- >> .../devicetree/bindings/input/regulator-haptic.txt | 24 ++ >> drivers/input/misc/Kconfig | 11 + >> drivers/input/misc/Makefile | 1 + >> drivers/input/misc/regulator-haptic.c | 241 ++++++++++++++++++++ >> 4 files changed, 277 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt >> create mode 100644 drivers/input/misc/regulator-haptic.c >> >> diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt >> new file mode 100644 >> index 0000000..9f60e17 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt >> @@ -0,0 +1,24 @@ >> +* Requlator Haptic Device Tree Bindings >> + >> +The regulator haptic driver controlled by voltage of regulator. >> +This driver implemented via Force Feedback interface. >> + >> +Required Properties: >> + - compatible : Should be "regulator-haptic" >> + - haptic-supply : Power supply for the haptic motor. >> + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt >> + >> + - max-microvolt : The maximum voltage value supplied to haptic motor. >> + [The unit of the voltage is a micro] >> + >> + - min-microvolt : The minimum voltage value in which haptic motor reacts. >> + [The unit of the voltage is a micro] >> + >> +Example: >> + >> + regulator-haptic { >> + 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..1a83ecb >> --- /dev/null >> +++ b/drivers/input/misc/regulator-haptic.c >> @@ -0,0 +1,241 @@ >> +/* >> + * 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/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/input.h> >> +#include <linux/slab.h> >> +#include <linux/regulator/consumer.h> >> +#include <linux/of.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) >> +{ >> + int error; >> + >> + if (haptic->enabled) >> + return; >> + >> + error = regulator_enable(haptic->regulator); >> + if (error) { >> + dev_err(haptic->dev, "cannot enable regulator\n"); >> + return; >> + } >> + >> + haptic->enabled = true; >> +} >> + >> +static void regulator_haptic_disable(struct regulator_haptic *haptic) >> +{ >> + int error; >> + >> + if (!haptic->enabled) >> + return; >> + >> + error = regulator_disable(haptic->regulator); >> + if (error) { >> + dev_err(haptic->dev, "cannot disable regulator\n"); >> + return; >> + } >> + >> + haptic->enabled = false; >> +} >> + >> +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); >> + else >> + regulator_haptic_disable(haptic); >> +} >> + >> +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_disable(haptic); >> +} >> + >> +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; >> +} >> + >> +static int regulator_haptic_probe(struct platform_device *pdev) >> +{ >> + struct regulator_haptic *haptic; >> + 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); >> + >> + error = regulator_haptic_parse_dt(haptic); >> + if (error) { >> + dev_err(&pdev->dev, "failed to parse device tree\n"); >> + return error; >> + } >> + >> + haptic->regulator = devm_regulator_get(&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_disable(haptic); >> + 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->enabled) { >> + regulator_haptic_enable(haptic); >> + 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" }, >> + {}, >> +}; >> + >> +static struct platform_driver regulator_haptic_driver = { >> + .probe = regulator_haptic_probe, >> + .driver = { >> + .name = "regulator-haptic", >> + .owner = THIS_MODULE, > .owner is no more required for drivers using module_platform_driver() > > Thanks, > Pankaj Dubey Thanks to review my patches. I will remove next version. > >> + .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_ALIAS("platform:regulator-haptic"); >> +MODULE_DESCRIPTION("Regulator haptic driver"); >> +MODULE_LICENSE("GPL"); >> -- >> 1.7.9.5 >> >> -- >> 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 Regards, 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 Dan, 2014? 11? 21? 00:09? Dan Murphy ?(?) ? ?: > Hi > > On 11/20/2014 08:33 AM, Pankaj Dubey wrote: >> Hi Jaewon, >> >> On 20 November 2014 19:01, Jaewon Kim <jaewon02.kim@samsung.com> 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> >>> --- >>> .../devicetree/bindings/input/regulator-haptic.txt | 24 ++ >>> drivers/input/misc/Kconfig | 11 + >>> drivers/input/misc/Makefile | 1 + >>> drivers/input/misc/regulator-haptic.c | 241 ++++++++++++++++++++ >>> 4 files changed, 277 insertions(+) >>> create mode 100644 Documentation/devicetree/bindings/input/regulator-haptic.txt >>> create mode 100644 drivers/input/misc/regulator-haptic.c >>> >>> diff --git a/Documentation/devicetree/bindings/input/regulator-haptic.txt b/Documentation/devicetree/bindings/input/regulator-haptic.txt >>> new file mode 100644 >>> index 0000000..9f60e17 >>> --- /dev/null >>> +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt >>> @@ -0,0 +1,24 @@ >>> +* Requlator Haptic Device Tree Bindings >>> + >>> +The regulator haptic driver controlled by voltage of regulator. >>> +This driver implemented via Force Feedback interface. >>> + >>> +Required Properties: >>> + - compatible : Should be "regulator-haptic" >>> + - haptic-supply : Power supply for the haptic motor. >>> + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt >>> + >>> + - max-microvolt : The maximum voltage value supplied to haptic motor. >>> + [The unit of the voltage is a micro] >>> + >>> + - min-microvolt : The minimum voltage value in which haptic motor reacts. >>> + [The unit of the voltage is a micro] >>> + >>> +Example: >>> + >>> + regulator-haptic { > Should this be more about the function and not the driver name? > Somehting like > > haptics { Yes, haptics is better than driver name. > >>> + 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..1a83ecb >>> --- /dev/null >>> +++ b/drivers/input/misc/regulator-haptic.c >>> @@ -0,0 +1,241 @@ >>> +/* >>> + * 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/module.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/input.h> >>> +#include <linux/slab.h> >>> +#include <linux/regulator/consumer.h> >>> +#include <linux/of.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; > I don't understand what you are tracking here. You only set it and unset > this value but never do any checking > >>> + unsigned int max_volt; >>> + unsigned int min_volt; >>> + unsigned int intensity; >>> + unsigned int magnitude; >>> +}; >>> + >>> +static void regulator_haptic_enable(struct regulator_haptic *haptic) >>> +{ >>> + int error; >>> + >>> + if (haptic->enabled) >>> + return; >>> + >>> + error = regulator_enable(haptic->regulator); >>> + if (error) { >>> + dev_err(haptic->dev, "cannot enable regulator\n"); >>> + return; >>> + } >>> + >>> + haptic->enabled = true; >>> +} >>> + >>> +static void regulator_haptic_disable(struct regulator_haptic *haptic) >>> +{ >>> + int error; >>> + >>> + if (!haptic->enabled) >>> + return; >>> + >>> + error = regulator_disable(haptic->regulator); >>> + if (error) { >>> + dev_err(haptic->dev, "cannot disable regulator\n"); >>> + return; >>> + } >>> + >>> + haptic->enabled = false; >>> +} > Can the enable/disable just be one function with an argument? > Then you can centralize the check and reduce the code footprint. Ok. I will merge two function with a boolean parameter. > >>> + >>> +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); >>> + else >>> + regulator_haptic_disable(haptic); >>> +} >>> + >>> +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_disable(haptic); >>> +} >>> + >>> +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; >>> +} >>> + >>> +static int regulator_haptic_probe(struct platform_device *pdev) >>> +{ >>> + struct regulator_haptic *haptic; >>> + 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); >>> + >>> + error = regulator_haptic_parse_dt(haptic); > Do you need platform data support for platforms that do not currently support > dt? Ok I will support platform data in next version. > >>> + if (error) { >>> + dev_err(&pdev->dev, "failed to parse device tree\n"); >>> + return error; >>> + } >>> + >>> + haptic->regulator = devm_regulator_get(&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_disable(haptic); >>> + 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->enabled) { >>> + regulator_haptic_enable(haptic); > We enable the regulator when we do the haptics work if magnitude is > 0. > And during suspend haptic->enabled may get set to false if it is true > so wouldn't haptic->enabled always be false here? You are right, It was my typo. It is "if (haptic->suspend_state)". My intention is restore past state. thanks to point error. > > Plus do we want to continue the haptic response when coming out of suspend state? > >>> + 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" }, >>> + {}, >>> +}; >>> + >>> +static struct platform_driver regulator_haptic_driver = { >>> + .probe = regulator_haptic_probe, >>> + .driver = { >>> + .name = "regulator-haptic", >>> + .owner = THIS_MODULE, >> .owner is no more required for drivers using module_platform_driver() >> >> Thanks, >> Pankaj Dubey >> >>> + .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_ALIAS("platform:regulator-haptic"); >>> +MODULE_DESCRIPTION("Regulator haptic driver"); >>> +MODULE_LICENSE("GPL"); >>> -- >>> 1.7.9.5 >>> >>> -- >>> 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 >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-input" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > -- 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 Mark, 2014? 11? 28? 21:50? Mark Brown ?(?) ? ?: > On Thu, Nov 20, 2014 at 10:31:39PM +0900, Jaewon Kim wrote: > >> + haptic->regulator = devm_regulator_get(&pdev->dev, "haptic"); >> + if (IS_ERR(haptic->regulator)) { >> + dev_err(&pdev->dev, "failed to get regulator\n"); >> + return PTR_ERR(haptic->regulator); >> + } > This needs to be _get_exclusive() - the driver will be broken if > something else shares the regualtor since it relies on both enabling and > disabling the regulator and on setting the voltage for effects. It's > not like a power supply where leaving the device powered when it could > be off is going to have no effect, if the power is left on then the > haptic motor will continue to operate. Thanks to review my patch. Haptic regulator has to only be used in this driver. So, it is right to change like your advice. I will fix next version. 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..9f60e17 --- /dev/null +++ b/Documentation/devicetree/bindings/input/regulator-haptic.txt @@ -0,0 +1,24 @@ +* Requlator Haptic Device Tree Bindings + +The regulator haptic driver controlled by voltage of regulator. +This driver implemented via Force Feedback interface. + +Required Properties: + - compatible : Should be "regulator-haptic" + - haptic-supply : Power supply for the haptic motor. + [*] refer Documentation/devicetree/bindings/regulator/regulator.txt + + - max-microvolt : The maximum voltage value supplied to haptic motor. + [The unit of the voltage is a micro] + + - min-microvolt : The minimum voltage value in which haptic motor reacts. + [The unit of the voltage is a micro] + +Example: + + regulator-haptic { + 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..1a83ecb --- /dev/null +++ b/drivers/input/misc/regulator-haptic.c @@ -0,0 +1,241 @@ +/* + * 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/module.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/slab.h> +#include <linux/regulator/consumer.h> +#include <linux/of.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) +{ + int error; + + if (haptic->enabled) + return; + + error = regulator_enable(haptic->regulator); + if (error) { + dev_err(haptic->dev, "cannot enable regulator\n"); + return; + } + + haptic->enabled = true; +} + +static void regulator_haptic_disable(struct regulator_haptic *haptic) +{ + int error; + + if (!haptic->enabled) + return; + + error = regulator_disable(haptic->regulator); + if (error) { + dev_err(haptic->dev, "cannot disable regulator\n"); + return; + } + + haptic->enabled = false; +} + +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); + else + regulator_haptic_disable(haptic); +} + +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_disable(haptic); +} + +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; +} + +static int regulator_haptic_probe(struct platform_device *pdev) +{ + struct regulator_haptic *haptic; + 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); + + error = regulator_haptic_parse_dt(haptic); + if (error) { + dev_err(&pdev->dev, "failed to parse device tree\n"); + return error; + } + + haptic->regulator = devm_regulator_get(&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_disable(haptic); + 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->enabled) { + regulator_haptic_enable(haptic); + 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" }, + {}, +}; + +static struct platform_driver regulator_haptic_driver = { + .probe = regulator_haptic_probe, + .driver = { + .name = "regulator-haptic", + .owner = THIS_MODULE, + .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_ALIAS("platform:regulator-haptic"); +MODULE_DESCRIPTION("Regulator haptic driver"); +MODULE_LICENSE("GPL");