diff mbox

[5/6] mc13783: add power button support

Message ID 1311271463-4356-6-git-send-email-philippe.retornaz@epfl.ch (mailing list archive)
State New, archived
Headers show

Commit Message

Philippe Rétornaz July 21, 2011, 6:04 p.m. UTC 
This adds support for the power-on buttons of MC13783 PMIC.
This is done using a misc input device.

Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch>
---
 drivers/input/misc/Kconfig             |   10 +
 drivers/input/misc/Makefile            |    1 +
 drivers/input/misc/mc13783-pwrbutton.c |  288 ++++++++++++++++++++++++++++++++
 drivers/mfd/mc13xxx-core.c             |    4 +
 include/linux/mfd/mc13783.h            |    1 +
 include/linux/mfd/mc13xxx.h            |   17 ++
 6 files changed, 321 insertions(+), 0 deletions(-)
 create mode 100644 drivers/input/misc/mc13783-pwrbutton.c

Comments

Wanlong Gao July 22, 2011, 1:07 a.m. UTC | #1 
On 07/22/2011 02:04 AM, Philippe Rétornaz wrote:
> This adds support for the power-on buttons of MC13783 PMIC.
> This is done using a misc input device.
>
> Signed-off-by: Philippe Rétornaz<philippe.retornaz@epfl.ch>
> ---
>   drivers/input/misc/Kconfig             |   10 +
>   drivers/input/misc/Makefile            |    1 +
>   drivers/input/misc/mc13783-pwrbutton.c |  288 ++++++++++++++++++++++++++++++++
>   drivers/mfd/mc13xxx-core.c             |    4 +
>   include/linux/mfd/mc13783.h            |    1 +
>   include/linux/mfd/mc13xxx.h            |   17 ++
>   6 files changed, 321 insertions(+), 0 deletions(-)
>   create mode 100644 drivers/input/misc/mc13783-pwrbutton.c
>
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index 45dc6aa..4272658 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -100,6 +100,16 @@ config INPUT_MAX8925_ONKEY
>   	  To compile this driver as a module, choose M here: the module
>   	  will be called max8925_onkey.
>

> +struct mc13783_pwrb {
> +	struct input_dev *pwr;
> +	struct mc13xxx *mc13783;
> +#define MC13783_PWRB_B1_POL_INVERT	(1<<  0)
> +#define MC13783_PWRB_B2_POL_INVERT	(1<<  1)
> +#define MC13783_PWRB_B3_POL_INVERT	(1<<  2)
> +	int flags;
> +	unsigned short keymap[3];
It seems like you just use the keymap[0]?


> +static int __devinit mc13783_pwrbutton_probe(struct platform_device *pdev)
> +{
> +	struct mc13xxx_buttons_platform_data *pdata;
> +	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
> +	struct input_dev *pwr;
> +	struct mc13783_pwrb *priv;
> +	int err = 0;
> +	int reg = 0;
> +
> +	pdata = dev_get_platdata(&pdev->dev);
> +	if (pdata == NULL) {
why not !pdata ? be consistent with below?


> +static int __devexit mc13783_pwrbutton_remove(struct platform_device *pdev)
> +{
> +	struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
> +	struct mc13xxx_buttons_platform_data *pdata;
> +	pdata = dev_get_platdata(&pdev->dev);
> +
> +	mc13xxx_lock(priv->mc13783);
> +
> +	if (pdata->b3on_flags&  MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
> +	if (pdata->b2on_flags&  MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
> +	if (pdata->b1on_flags&  MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
> +
> +	mc13xxx_unlock(priv->mc13783);
> +
> +	input_unregister_device(priv->pwr);
> +	kfree(priv);
	platform_set_drvdata(pdev, NULL);
> +
> +	return 0;
> +}
> +
Dmitry Torokhov July 22, 2011, 5 a.m. UTC | #2 
Hi Philippe,

On Thu, Jul 21, 2011 at 08:04:22PM +0200, Philippe Rétornaz wrote:
> This adds support for the power-on buttons of MC13783 PMIC.
> This is done using a misc input device.
> 

Mostly looks good, just a couple of comments below.

> @@ -0,0 +1,288 @@
> +/**
> + * mc13783-pwrbutton.c - MC13783 Power Button Input Driver
> + *

Please drop the file name from comment - if we ever rename the file we
won't have to update it here as well.

> + * Copyright (C) 2011 Philippe Rétornaz
> + *
> + * Based on twl4030-pwrbutton driver by:
> + *     Peter De Schrijver <peter.de-schrijver@nokia.com>
> + *     Felipe Balbi <felipe.balbi@nokia.com>
> + *
> + * This file is subject to the terms and conditions of the GNU General
> + * Public License. See the file "COPYING" in the main directory of this
> + * archive for more details.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335  USA
> + */
> +
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/errno.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/platform_device.h>
> +#include <linux/mfd/mc13783.h>
> +#include <linux/sched.h>
> +#include <linux/slab.h>
> +
> +struct mc13783_pwrb {
> +	struct input_dev *pwr;
> +	struct mc13xxx *mc13783;
> +#define MC13783_PWRB_B1_POL_INVERT	(1 << 0)
> +#define MC13783_PWRB_B2_POL_INVERT	(1 << 1)
> +#define MC13783_PWRB_B3_POL_INVERT	(1 << 2)
> +	int flags;
> +	unsigned short keymap[3];
> +};
> +
> +#define MC13783_REG_INTERRUPT_SENSE_1		5
> +#define MC13783_IRQSENSE1_ONOFD1S		(1 << 3)
> +#define MC13783_IRQSENSE1_ONOFD2S		(1 << 4)
> +#define MC13783_IRQSENSE1_ONOFD3S		(1 << 5)
> +
> +#define MC13783_REG_POWER_CONTROL_2		15
> +#define MC13783_POWER_CONTROL_2_ON1BDBNC	4
> +#define MC13783_POWER_CONTROL_2_ON2BDBNC	6
> +#define MC13783_POWER_CONTROL_2_ON3BDBNC	8
> +#define MC13783_POWER_CONTROL_2_ON1BRSTEN	(1 << 1)
> +#define MC13783_POWER_CONTROL_2_ON2BRSTEN	(1 << 2)
> +#define MC13783_POWER_CONTROL_2_ON3BRSTEN	(1 << 3)
> +
> +static irqreturn_t button_irq(int irq, void *_priv)
> +{
> +	struct mc13783_pwrb *priv = _priv;
> +	int val;

Please have blank lines between variable declarations and code.

> +	mc13xxx_irq_ack(priv->mc13783, irq);
> +	mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
> +
> +	switch (irq) {
> +	case MC13783_IRQ_ONOFD1:
> +		val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
> +		if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
> +			val ^= 1;
> +		input_report_key(priv->pwr, priv->keymap[0], val);
> +		break;
> +
> +	case MC13783_IRQ_ONOFD2:
> +		val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
> +		if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
> +			val ^= 1;
> +		input_report_key(priv->pwr, priv->keymap[1], val);
> +		break;
> +
> +	case MC13783_IRQ_ONOFD3:
> +		val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
> +		if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
> +			val ^= 1;
> +		input_report_key(priv->pwr, priv->keymap[2], val);
> +		break;
> +	}
> +
> +	input_sync(priv->pwr);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static int __devinit mc13783_pwrbutton_probe(struct platform_device *pdev)
> +{
> +	struct mc13xxx_buttons_platform_data *pdata;

const?

> +	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
> +	struct input_dev *pwr;
> +	struct mc13783_pwrb *priv;
> +	int err = 0;
> +	int reg = 0;
> +
> +	pdata = dev_get_platdata(&pdev->dev);
> +	if (pdata == NULL) {

	if (!pdata) { ..

> +		dev_err(&pdev->dev, "missing platform data\n");
> +		return -ENODEV;
> +	}
> +
> +	pwr = input_allocate_device();
> +	if (!pwr) {
> +		dev_dbg(&pdev->dev, "Can't allocate power button\n");
> +		return -ENOMEM;
> +	}
> +
> +	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
> +

Unneeded blank line here.

> +	if (!priv) {
> +		err = -ENOMEM;
> +		dev_dbg(&pdev->dev, "Can't allocate power button\n");
> +		goto free_input_dev;
> +	}
> +
> +	pwr->evbit[0] = BIT_MASK(EV_KEY);

Just use __set_bit() here as well. Also, why this initialization is
separate from the rest of the code initializing input device. I think it
is good practice to keep related pieces together.

> +
> +	reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
> +	reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
> +	reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;
> +
> +	priv->pwr = pwr;
> +	priv->mc13783 = mc13783;
> +
> +	mc13xxx_lock(mc13783);
> +
> +	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
> +		priv->keymap[0] = pdata->b1on_key;
> +		if (pdata->b1on_key != KEY_RESERVED)
> +			__set_bit(pdata->b1on_key, pwr->keybit);
> +
> +		if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
> +			priv->flags |= MC13783_PWRB_B1_POL_INVERT;
> +
> +		if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
> +			reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;
> +
> +		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
> +					  button_irq, "b1on", priv);
> +

Another unneeded blank line.

> +		if (err) {
> +			mc13xxx_unlock(mc13783);

Why irregular error handling in this case? Just have a separate label
for the unlock statement and jump to it.

> +
> +			dev_dbg(&pdev->dev, "Can't request irq\n");
> +			goto free_priv;
> +		}
> +	}
> +
> +	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
> +		priv->keymap[0] = pdata->b2on_key;
> +		if (pdata->b2on_key != KEY_RESERVED)
> +			__set_bit(pdata->b2on_key, pwr->keybit);
> +
> +		if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
> +			priv->flags |= MC13783_PWRB_B2_POL_INVERT;
> +
> +		if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
> +			reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;
> +
> +		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
> +					  button_irq, "b2on", priv);
> +
> +		if (err) {
> +			dev_dbg(&pdev->dev, "Can't request irq\n");
> +			goto free_irq_b1;
> +		}
> +	}
> +
> +	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
> +		priv->keymap[0] = pdata->b3on_key;
> +		if (pdata->b3on_key != KEY_RESERVED)
> +			__set_bit(pdata->b3on_key, pwr->keybit);
> +
> +		if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
> +			priv->flags |= MC13783_PWRB_B3_POL_INVERT;
> +
> +		if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
> +			reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;
> +
> +		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
> +					  button_irq, "b3on", priv);
> +
> +		if (err) {
> +			dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
> +			goto free_irq_b2;
> +		}
> +	}
> +
> +	mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
> +
> +	mc13xxx_unlock(mc13783);
> +
> +	pwr->name = "mc13783_pwrbutton";
> +	pwr->phys = "mc13783_pwrbutton/input0";
> +	pwr->dev.parent = &pdev->dev;
> +
> +	pwr->keycode = priv->keymap;
> +	pwr->keycodemax = ARRAY_SIZE(priv->keymap);
> +	pwr->keycodesize = sizeof(priv->keymap[0]);
> +
> +	err = input_register_device(pwr);
> +	if (err) {
> +		dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
> +		goto free_irq;
> +	}
> +
> +	platform_set_drvdata(pdev, priv);
> +
> +	return 0;
> +
> +free_irq:
> +	mc13xxx_lock(mc13783);
> +
> +	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
> +free_irq_b2:
> +	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
> +
> +free_irq_b1:
> +	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
> +
> +	mc13xxx_unlock(mc13783);
> +
> +free_priv:
> +	kfree(priv);
> +
> +free_input_dev:
> +	input_free_device(pwr);
> +
> +	return err;
> +}
> +
> +static int __devexit mc13783_pwrbutton_remove(struct platform_device *pdev)
> +{
> +	struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
> +	struct mc13xxx_buttons_platform_data *pdata;

const + entra line.

> +	pdata = dev_get_platdata(&pdev->dev);
> +
> +	mc13xxx_lock(priv->mc13783);
> +
> +	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
> +	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
> +	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
> +		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
> +
> +	mc13xxx_unlock(priv->mc13783);
> +
> +	input_unregister_device(priv->pwr);
> +	kfree(priv);
> +
> +	return 0;
> +}
> +
> +struct platform_driver mc13783_pwrbutton_driver = {
> +	.probe		= mc13783_pwrbutton_probe,
> +	.remove		= __devexit_p(mc13783_pwrbutton_remove),
> +	.driver		= {
> +		.name	= "mc13783-pwrbutton",
> +		.owner	= THIS_MODULE,
> +	},
> +};
> +
> +static int __init mc13783_pwrbutton_init(void)
> +{
> +	return platform_driver_register(&mc13783_pwrbutton_driver);
> +}
> +module_init(mc13783_pwrbutton_init);
> +
> +static void __exit mc13783_pwrbutton_exit(void)
> +{
> +	platform_driver_unregister(&mc13783_pwrbutton_driver);
> +}
> +module_exit(mc13783_pwrbutton_exit);
> +
> +MODULE_ALIAS("platform:mc13783-pwrbutton");
> +MODULE_DESCRIPTION("MC13783 Power Button");
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Philippe Retornaz");
> diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
> index 2867c21..da8d276 100644
> --- a/drivers/mfd/mc13xxx-core.c
> +++ b/drivers/mfd/mc13xxx-core.c
> @@ -776,6 +776,10 @@ err_revision:
>  		mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
>  				pdata->leds, sizeof(*pdata->leds));
>  
> +	if (pdata->buttons)
> +		mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
> +				pdata->buttons, sizeof(*pdata->buttons));
> +
>  	return 0;
>  }
>  
> diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
> index 3756a30..aa824d0 100644
> --- a/include/linux/mfd/mc13783.h
> +++ b/include/linux/mfd/mc13783.h
> @@ -106,6 +106,7 @@ static inline int mc13783_irq_ack(struct mc13783 *mc13783, int irq)
>  #define mc13783_regulator_platform_data mc13xxx_regulator_platform_data
>  #define mc13783_led_platform_data mc13xxx_led_platform_data
>  #define mc13783_leds_platform_data mc13xxx_leds_platform_data
> +#define mc13783_buttons_platform_data mc13xxx_buttons_platform_data
>  
>  #define mc13783_platform_data mc13xxx_platform_data
>  #define MC13783_USE_TOUCHSCREEN	MC13XXX_USE_TOUCHSCREEN
> diff --git a/include/linux/mfd/mc13xxx.h b/include/linux/mfd/mc13xxx.h
> index cef1497..f24be68 100644
> --- a/include/linux/mfd/mc13xxx.h
> +++ b/include/linux/mfd/mc13xxx.h
> @@ -137,6 +137,22 @@ struct mc13xxx_leds_platform_data {
>  	char tc3_period;
>  };
>  
> +struct mc13xxx_buttons_platform_data {
> +#define MC13783_BUTTON_DBNC_0MS		0
> +#define MC13783_BUTTON_DBNC_30MS	1
> +#define MC13783_BUTTON_DBNC_150MS	2
> +#define MC13783_BUTTON_DBNC_750MS	3
> +#define MC13783_BUTTON_ENABLE		(1 << 2)
> +#define MC13783_BUTTON_POL_INVERT	(1 << 3)
> +#define MC13783_BUTTON_RESET_EN		(1 << 4)
> +	int b1on_flags;
> +	unsigned short b1on_key;
> +	int b2on_flags;
> +	unsigned short b2on_key;
> +	int b3on_flags;
> +	unsigned short b3on_key;
> +};
> +
>  struct mc13xxx_platform_data {
>  #define MC13XXX_USE_TOUCHSCREEN (1 << 0)
>  #define MC13XXX_USE_CODEC	(1 << 1)
> @@ -146,6 +162,7 @@ struct mc13xxx_platform_data {
>  
>  	struct mc13xxx_regulator_platform_data regulators;
>  	struct mc13xxx_leds_platform_data *leds;
> +	struct mc13xxx_buttons_platform_data *buttons;
>  };
>  
>  #endif /* ifndef __LINUX_MFD_MC13XXX_H */
> -- 
> 1.6.3.3
> 

Otherwise:

	Acked-by: Dmitry Torokhov <dtor@mail.ru>

Please feel free to merge with the rest of the patches.

Thanks.
Philippe Rétornaz July 22, 2011, 1:21 p.m. UTC | #3 
Le vendredi 22 juillet 2011 03:07:11, Wanlong Gao a écrit :
> On 07/22/2011 02:04 AM, Philippe Rétornaz wrote:
> > This adds support for the power-on buttons of MC13783 PMIC.
> > This is done using a misc input device.
> > 
> > Signed-off-by: Philippe Rétornaz<philippe.retornaz@epfl.ch>
> > ---
> > 
> >   drivers/input/misc/Kconfig             |   10 +
> >   drivers/input/misc/Makefile            |    1 +
> >   drivers/input/misc/mc13783-pwrbutton.c |  288
> >   ++++++++++++++++++++++++++++++++ drivers/mfd/mc13xxx-core.c           
> >    |    4 +
> >   include/linux/mfd/mc13783.h            |    1 +
> >   include/linux/mfd/mc13xxx.h            |   17 ++
> >   6 files changed, 321 insertions(+), 0 deletions(-)
> >   create mode 100644 drivers/input/misc/mc13783-pwrbutton.c
> > 
> > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> > index 45dc6aa..4272658 100644
> > --- a/drivers/input/misc/Kconfig
> > +++ b/drivers/input/misc/Kconfig
> > @@ -100,6 +100,16 @@ config INPUT_MAX8925_ONKEY
> > 
> >   	  To compile this driver as a module, choose M here: the module
> >   	  will be called max8925_onkey.
> > 
> > +struct mc13783_pwrb {
> > +	struct input_dev *pwr;
> > +	struct mc13xxx *mc13783;
> > +#define MC13783_PWRB_B1_POL_INVERT	(1<<  0)
> > +#define MC13783_PWRB_B2_POL_INVERT	(1<<  1)
> > +#define MC13783_PWRB_B3_POL_INVERT	(1<<  2)
> > +	int flags;
> > +	unsigned short keymap[3];
> 
> It seems like you just use the keymap[0]?

No, keymap[0] is for button 0, keymap[1] if for button 1 and keymap[2] is for 
button 3. The _probe() function wrongly initialized the two last button. I 
will fix this in the next patch.

Thanks for spotting this.

Regards,

Philippe
diff mbox

Patch

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 45dc6aa..4272658 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -100,6 +100,16 @@  config INPUT_MAX8925_ONKEY
 	  To compile this driver as a module, choose M here: the module
 	  will be called max8925_onkey.
 
+config INPUT_MC13783_PWRBUTTON
+	tristate "MC13783 ON buttons"
+	depends on MFD_MC13783
+	help
+	  Support the ON buttons of MC13783 PMIC as an input device
+	  reporting power button status.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called mc13783-pwrbutton.
+
 config INPUT_APANEL
 	tristate "Fujitsu Lifebook Application Panel buttons"
 	depends on X86 && I2C && LEDS_CLASS
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 38efb2c..ecced4c 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -27,6 +27,7 @@  obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o
 obj-$(CONFIG_INPUT_KEYSPAN_REMOTE)	+= keyspan_remote.o
 obj-$(CONFIG_INPUT_M68K_BEEP)		+= m68kspkr.o
 obj-$(CONFIG_INPUT_MAX8925_ONKEY)	+= max8925_onkey.o
+obj-$(CONFIG_INPUT_MC13783_PWRBUTTON)	+= mc13783-pwrbutton.o
 obj-$(CONFIG_INPUT_PCAP)		+= pcap_keys.o
 obj-$(CONFIG_INPUT_PCF50633_PMU)	+= pcf50633-input.o
 obj-$(CONFIG_INPUT_PCF8574)		+= pcf8574_keypad.o
diff --git a/drivers/input/misc/mc13783-pwrbutton.c b/drivers/input/misc/mc13783-pwrbutton.c
new file mode 100644
index 0000000..1fe308b
--- /dev/null
+++ b/drivers/input/misc/mc13783-pwrbutton.c
@@ -0,0 +1,288 @@ 
+/**
+ * mc13783-pwrbutton.c - MC13783 Power Button Input Driver
+ *
+ * Copyright (C) 2011 Philippe Rétornaz
+ *
+ * Based on twl4030-pwrbutton driver by:
+ *     Peter De Schrijver <peter.de-schrijver@nokia.com>
+ *     Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335  USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/mc13783.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+struct mc13783_pwrb {
+	struct input_dev *pwr;
+	struct mc13xxx *mc13783;
+#define MC13783_PWRB_B1_POL_INVERT	(1 << 0)
+#define MC13783_PWRB_B2_POL_INVERT	(1 << 1)
+#define MC13783_PWRB_B3_POL_INVERT	(1 << 2)
+	int flags;
+	unsigned short keymap[3];
+};
+
+#define MC13783_REG_INTERRUPT_SENSE_1		5
+#define MC13783_IRQSENSE1_ONOFD1S		(1 << 3)
+#define MC13783_IRQSENSE1_ONOFD2S		(1 << 4)
+#define MC13783_IRQSENSE1_ONOFD3S		(1 << 5)
+
+#define MC13783_REG_POWER_CONTROL_2		15
+#define MC13783_POWER_CONTROL_2_ON1BDBNC	4
+#define MC13783_POWER_CONTROL_2_ON2BDBNC	6
+#define MC13783_POWER_CONTROL_2_ON3BDBNC	8
+#define MC13783_POWER_CONTROL_2_ON1BRSTEN	(1 << 1)
+#define MC13783_POWER_CONTROL_2_ON2BRSTEN	(1 << 2)
+#define MC13783_POWER_CONTROL_2_ON3BRSTEN	(1 << 3)
+
+static irqreturn_t button_irq(int irq, void *_priv)
+{
+	struct mc13783_pwrb *priv = _priv;
+	int val;
+	mc13xxx_irq_ack(priv->mc13783, irq);
+	mc13xxx_reg_read(priv->mc13783, MC13783_REG_INTERRUPT_SENSE_1, &val);
+
+	switch (irq) {
+	case MC13783_IRQ_ONOFD1:
+		val = val & MC13783_IRQSENSE1_ONOFD1S ? 1 : 0;
+		if (priv->flags & MC13783_PWRB_B1_POL_INVERT)
+			val ^= 1;
+		input_report_key(priv->pwr, priv->keymap[0], val);
+		break;
+
+	case MC13783_IRQ_ONOFD2:
+		val = val & MC13783_IRQSENSE1_ONOFD2S ? 1 : 0;
+		if (priv->flags & MC13783_PWRB_B2_POL_INVERT)
+			val ^= 1;
+		input_report_key(priv->pwr, priv->keymap[1], val);
+		break;
+
+	case MC13783_IRQ_ONOFD3:
+		val = val & MC13783_IRQSENSE1_ONOFD3S ? 1 : 0;
+		if (priv->flags & MC13783_PWRB_B3_POL_INVERT)
+			val ^= 1;
+		input_report_key(priv->pwr, priv->keymap[2], val);
+		break;
+	}
+
+	input_sync(priv->pwr);
+
+	return IRQ_HANDLED;
+}
+
+static int __devinit mc13783_pwrbutton_probe(struct platform_device *pdev)
+{
+	struct mc13xxx_buttons_platform_data *pdata;
+	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
+	struct input_dev *pwr;
+	struct mc13783_pwrb *priv;
+	int err = 0;
+	int reg = 0;
+
+	pdata = dev_get_platdata(&pdev->dev);
+	if (pdata == NULL) {
+		dev_err(&pdev->dev, "missing platform data\n");
+		return -ENODEV;
+	}
+
+	pwr = input_allocate_device();
+	if (!pwr) {
+		dev_dbg(&pdev->dev, "Can't allocate power button\n");
+		return -ENOMEM;
+	}
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+
+	if (!priv) {
+		err = -ENOMEM;
+		dev_dbg(&pdev->dev, "Can't allocate power button\n");
+		goto free_input_dev;
+	}
+
+	pwr->evbit[0] = BIT_MASK(EV_KEY);
+
+	reg |= (pdata->b1on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON1BDBNC;
+	reg |= (pdata->b2on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON2BDBNC;
+	reg |= (pdata->b3on_flags & 0x3) << MC13783_POWER_CONTROL_2_ON3BDBNC;
+
+	priv->pwr = pwr;
+	priv->mc13783 = mc13783;
+
+	mc13xxx_lock(mc13783);
+
+	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE) {
+		priv->keymap[0] = pdata->b1on_key;
+		if (pdata->b1on_key != KEY_RESERVED)
+			__set_bit(pdata->b1on_key, pwr->keybit);
+
+		if (pdata->b1on_flags & MC13783_BUTTON_POL_INVERT)
+			priv->flags |= MC13783_PWRB_B1_POL_INVERT;
+
+		if (pdata->b1on_flags & MC13783_BUTTON_RESET_EN)
+			reg |= MC13783_POWER_CONTROL_2_ON1BRSTEN;
+
+		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD1,
+					  button_irq, "b1on", priv);
+
+		if (err) {
+			mc13xxx_unlock(mc13783);
+
+			dev_dbg(&pdev->dev, "Can't request irq\n");
+			goto free_priv;
+		}
+	}
+
+	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE) {
+		priv->keymap[0] = pdata->b2on_key;
+		if (pdata->b2on_key != KEY_RESERVED)
+			__set_bit(pdata->b2on_key, pwr->keybit);
+
+		if (pdata->b2on_flags & MC13783_BUTTON_POL_INVERT)
+			priv->flags |= MC13783_PWRB_B2_POL_INVERT;
+
+		if (pdata->b2on_flags & MC13783_BUTTON_RESET_EN)
+			reg |= MC13783_POWER_CONTROL_2_ON2BRSTEN;
+
+		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD2,
+					  button_irq, "b2on", priv);
+
+		if (err) {
+			dev_dbg(&pdev->dev, "Can't request irq\n");
+			goto free_irq_b1;
+		}
+	}
+
+	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE) {
+		priv->keymap[0] = pdata->b3on_key;
+		if (pdata->b3on_key != KEY_RESERVED)
+			__set_bit(pdata->b3on_key, pwr->keybit);
+
+		if (pdata->b3on_flags & MC13783_BUTTON_POL_INVERT)
+			priv->flags |= MC13783_PWRB_B3_POL_INVERT;
+
+		if (pdata->b3on_flags & MC13783_BUTTON_RESET_EN)
+			reg |= MC13783_POWER_CONTROL_2_ON3BRSTEN;
+
+		err = mc13xxx_irq_request(mc13783, MC13783_IRQ_ONOFD3,
+					  button_irq, "b3on", priv);
+
+		if (err) {
+			dev_dbg(&pdev->dev, "Can't request irq: %d\n", err);
+			goto free_irq_b2;
+		}
+	}
+
+	mc13xxx_reg_rmw(mc13783, MC13783_REG_POWER_CONTROL_2, 0x3FE, reg);
+
+	mc13xxx_unlock(mc13783);
+
+	pwr->name = "mc13783_pwrbutton";
+	pwr->phys = "mc13783_pwrbutton/input0";
+	pwr->dev.parent = &pdev->dev;
+
+	pwr->keycode = priv->keymap;
+	pwr->keycodemax = ARRAY_SIZE(priv->keymap);
+	pwr->keycodesize = sizeof(priv->keymap[0]);
+
+	err = input_register_device(pwr);
+	if (err) {
+		dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
+		goto free_irq;
+	}
+
+	platform_set_drvdata(pdev, priv);
+
+	return 0;
+
+free_irq:
+	mc13xxx_lock(mc13783);
+
+	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
+		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD3, priv);
+free_irq_b2:
+	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
+		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD2, priv);
+
+free_irq_b1:
+	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
+		mc13xxx_irq_free(mc13783, MC13783_IRQ_ONOFD1, priv);
+
+	mc13xxx_unlock(mc13783);
+
+free_priv:
+	kfree(priv);
+
+free_input_dev:
+	input_free_device(pwr);
+
+	return err;
+}
+
+static int __devexit mc13783_pwrbutton_remove(struct platform_device *pdev)
+{
+	struct mc13783_pwrb *priv = platform_get_drvdata(pdev);
+	struct mc13xxx_buttons_platform_data *pdata;
+	pdata = dev_get_platdata(&pdev->dev);
+
+	mc13xxx_lock(priv->mc13783);
+
+	if (pdata->b3on_flags & MC13783_BUTTON_ENABLE)
+		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD3, priv);
+	if (pdata->b2on_flags & MC13783_BUTTON_ENABLE)
+		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD2, priv);
+	if (pdata->b1on_flags & MC13783_BUTTON_ENABLE)
+		mc13xxx_irq_free(priv->mc13783, MC13783_IRQ_ONOFD1, priv);
+
+	mc13xxx_unlock(priv->mc13783);
+
+	input_unregister_device(priv->pwr);
+	kfree(priv);
+
+	return 0;
+}
+
+struct platform_driver mc13783_pwrbutton_driver = {
+	.probe		= mc13783_pwrbutton_probe,
+	.remove		= __devexit_p(mc13783_pwrbutton_remove),
+	.driver		= {
+		.name	= "mc13783-pwrbutton",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init mc13783_pwrbutton_init(void)
+{
+	return platform_driver_register(&mc13783_pwrbutton_driver);
+}
+module_init(mc13783_pwrbutton_init);
+
+static void __exit mc13783_pwrbutton_exit(void)
+{
+	platform_driver_unregister(&mc13783_pwrbutton_driver);
+}
+module_exit(mc13783_pwrbutton_exit);
+
+MODULE_ALIAS("platform:mc13783-pwrbutton");
+MODULE_DESCRIPTION("MC13783 Power Button");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Philippe Retornaz");
diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 2867c21..da8d276 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -776,6 +776,10 @@  err_revision:
 		mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
 				pdata->leds, sizeof(*pdata->leds));
 
+	if (pdata->buttons)
+		mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
+				pdata->buttons, sizeof(*pdata->buttons));
+
 	return 0;
 }
 
diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
index 3756a30..aa824d0 100644
--- a/include/linux/mfd/mc13783.h
+++ b/include/linux/mfd/mc13783.h
@@ -106,6 +106,7 @@  static inline int mc13783_irq_ack(struct mc13783 *mc13783, int irq)
 #define mc13783_regulator_platform_data mc13xxx_regulator_platform_data
 #define mc13783_led_platform_data mc13xxx_led_platform_data
 #define mc13783_leds_platform_data mc13xxx_leds_platform_data
+#define mc13783_buttons_platform_data mc13xxx_buttons_platform_data
 
 #define mc13783_platform_data mc13xxx_platform_data
 #define MC13783_USE_TOUCHSCREEN	MC13XXX_USE_TOUCHSCREEN
diff --git a/include/linux/mfd/mc13xxx.h b/include/linux/mfd/mc13xxx.h
index cef1497..f24be68 100644
--- a/include/linux/mfd/mc13xxx.h
+++ b/include/linux/mfd/mc13xxx.h
@@ -137,6 +137,22 @@  struct mc13xxx_leds_platform_data {
 	char tc3_period;
 };
 
+struct mc13xxx_buttons_platform_data {
+#define MC13783_BUTTON_DBNC_0MS		0
+#define MC13783_BUTTON_DBNC_30MS	1
+#define MC13783_BUTTON_DBNC_150MS	2
+#define MC13783_BUTTON_DBNC_750MS	3
+#define MC13783_BUTTON_ENABLE		(1 << 2)
+#define MC13783_BUTTON_POL_INVERT	(1 << 3)
+#define MC13783_BUTTON_RESET_EN		(1 << 4)
+	int b1on_flags;
+	unsigned short b1on_key;
+	int b2on_flags;
+	unsigned short b2on_key;
+	int b3on_flags;
+	unsigned short b3on_key;
+};
+
 struct mc13xxx_platform_data {
 #define MC13XXX_USE_TOUCHSCREEN (1 << 0)
 #define MC13XXX_USE_CODEC	(1 << 1)
@@ -146,6 +162,7 @@  struct mc13xxx_platform_data {
 
 	struct mc13xxx_regulator_platform_data regulators;
 	struct mc13xxx_leds_platform_data *leds;
+	struct mc13xxx_buttons_platform_data *buttons;
 };
 
 #endif /* ifndef __LINUX_MFD_MC13XXX_H */