[V17,3/3] Input: new da7280 haptic driver
diff mbox series

Message ID c13d812871b7f09205c1f04e95f5bdf07f307eaf.1595516501.git.Roy.Im@diasemi.com
State New
Headers show
Series
  • da7280: haptic driver submission
Related show

Commit Message

Roy Im July 23, 2020, 3:01 p.m. UTC
Adds support for the Dialog DA7280 LRA/ERM Haptic Driver with
multiple mode and integrated waveform memory and wideband support.
It communicates via an I2C bus to the device.

Reviewed-by: Jes Sorensen <Jes.Sorensen@gmail.com>.

Signed-off-by: Roy Im <roy.im.opensource@diasemi.com>

---
v17:
	- fixed an issue.
v16:
	- Corrected some code and updated description in Kconfig.
v15:
	- Removed some defines and updated some comments.
v14:
	- Updated pwm related code, alignments and comments.
v13:
	- Updated some conditions in pwm function and alignments.
v12: No changes.
v11: 
	- Updated the pwm related code, comments and typo.
v10: 
	- Updated the pwm related function and added some comments.
v9: 
	- Removed the header file and put the definitions into the c file.
	- Updated the pwm code and error logs with %pE
v8: 
	- Added changes to support FF_PERIODIC/FF_CUSTOM and FF_CONSTANT.
	- Updated the dt-related code.
	- Removed memless related functions.
v7: 
	- Added more attributes to handle one value per file.
	- Replaced and updated the dt-related code and functions called.
	- Fixed error/functions.
v6: No changes.
v5: Fixed errors in Kconfig file.
v4: Updated code as dt-bindings are changed.
v3: No changes.
v2: Fixed kbuild error/warning


 drivers/input/misc/Kconfig  |   13 +
 drivers/input/misc/Makefile |    1 +
 drivers/input/misc/da7280.c | 1840 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1854 insertions(+)
 create mode 100644 drivers/input/misc/da7280.c

Comments

Randy Dunlap July 23, 2020, 8:50 p.m. UTC | #1
On 7/23/20 8:01 AM, Roy Im wrote:
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index 362e8a0..06dc5a3 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -869,4 +869,17 @@ config INPUT_STPMIC1_ONKEY
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called stpmic1_onkey.
>  
> +config INPUT_DA7280_HAPTICS
> +	tristate "Dialog Semiconductor DA7280 haptics support"
> +	depends on INPUT && I2C
> +	select INPUT_FF_MEMLESS
> +	select REGMAP_I2C
> +	help
> +	  Say Y to enable support for the Dialog DA7280 haptics driver.
> +	  The haptics can be controlled by I2C communication,
> +	  or by PWM input, or by GPI.

	  Is that                GPIO.
?

Can the haptics be controlled only by PWM or only by GPI(O)?

Just curious: why is I2C required to build the driver if a user is
only controlling the device by PWM or GPI?


> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called da7280.
> +
>  endif

thanks.
Randy Dunlap July 23, 2020, 8:55 p.m. UTC | #2
On 7/23/20 8:01 AM, Roy Im wrote:
> Adds support for the Dialog DA7280 LRA/ERM Haptic Driver with
> multiple mode and integrated waveform memory and wideband support.
> It communicates via an I2C bus to the device.
> 
> Reviewed-by: Jes Sorensen <Jes.Sorensen@gmail.com>.
> 
> Signed-off-by: Roy Im <roy.im.opensource@diasemi.com>
> 
> ---
> 
> 
>  drivers/input/misc/Kconfig  |   13 +
>  drivers/input/misc/Makefile |    1 +
>  drivers/input/misc/da7280.c | 1840 +++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 1854 insertions(+)
>  create mode 100644 drivers/input/misc/da7280.c
> 

> diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
> new file mode 100644
> index 0000000..6e3ead5
> --- /dev/null
> +++ b/drivers/input/misc/da7280.c
> @@ -0,0 +1,1840 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * DA7280 Haptic device driver
> + *
> + * Copyright (c) 2020 Dialog Semiconductor.
> + * Author: Roy Im <Roy.Im.Opensource@diasemi.com>
> + */
> +
> +#include <linux/err.h>
> +#include <linux/i2c.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/pwm.h>
> +#include <linux/regmap.h>
> +#include <linux/workqueue.h>
> +#include <linux/uaccess.h>
> +#include <linux/bitops.h>
> +#include <linux/bitfield.h>
> +

...


> +static int da7280_haptic_set_pwm(struct da7280_haptic *haptics, bool enabled)
> +{
> +	struct pwm_state state;
> +	u64 period_mag_multi;
> +	int error;
> +
> +	if (!haptics->gain && enabled) {
> +		dev_err(haptics->dev,
> +			"Please set the gain first for the pwm mode\n");
> +		return -EINVAL;
> +	}
> +
> +	pwm_get_state(haptics->pwm_dev, &state);
> +	state.enabled = enabled;
> +	if (enabled) {
> +		period_mag_multi = (u64)state.period * haptics->gain;
> +		period_mag_multi >>= MAX_MAGNITUDE_SHIFT;
> +
> +		/* The interpretation of duty cycle depends on the acc_en,
> +		 * it should be between 50% and 100% for acc_en = 0.
> +		 * See datasheet 'PWM mode' section.
> +		 */

from coding-style.rst:

	/*
	 * This is the preferred style for multi-line
	 * comments in the Linux kernel source code.
	 * Please use it consistently.
	 *
	 * Description:  A column of asterisks on the left side,
	 * with beginning and ending almost-blank lines.
	 */

(except for networking code)

Please fix multiple locations.


thanks.
Roy Im July 24, 2020, 1:54 a.m. UTC | #3
On Fri, July 24, 2020 5:51 AM, Randy Dunlap wrote
> On 7/23/20 8:01 AM, Roy Im wrote:
> > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> > index 362e8a0..06dc5a3 100644
> > --- a/drivers/input/misc/Kconfig
> > +++ b/drivers/input/misc/Kconfig
> > @@ -869,4 +869,17 @@ config INPUT_STPMIC1_ONKEY
> >  	  To compile this driver as a module, choose M here: the
> >  	  module will be called stpmic1_onkey.
> >
> > +config INPUT_DA7280_HAPTICS
> > +	tristate "Dialog Semiconductor DA7280 haptics support"
> > +	depends on INPUT && I2C
> > +	select INPUT_FF_MEMLESS
> > +	select REGMAP_I2C
> > +	help
> > +	  Say Y to enable support for the Dialog DA7280 haptics driver.
> > +	  The haptics can be controlled by I2C communication,
> > +	  or by PWM input, or by GPI.
> 
> 	  Is that                GPIO.
> ?
The Haptics can be working by GPI(if see from the haptic device), but from the Host it is GPO. Do you think the GPIO is correct?

> 
> Can the haptics be controlled only by PWM or only by GPI(O)?
> 
> Just curious: why is I2C required to build the driver if a user is only controlling the device by PWM or GPI?

I2C is required to control registers and it can be triggered by I2C or PWM or GPI(controlled by host outside this driver), so PWM and GPI are optional.
With your comments, I think it's better to remove below lines(//remove) to avoid confusion and add PWM as below if you agree.
         // remove
	  The haptics can be controlled by I2C communication,
	  or by PWM input, or by GPI.
         // update, adding || PWM
         depends on (INPUT && I2C) || PWM
> 
> 
> > +
> > +	  To compile this driver as a module, choose M here: the
> > +	  module will be called da7280.
> > +
> >  endif
> 
> thanks.
> --
> ~Randy

Kind regards,
Roy
Roy Im July 24, 2020, 2:06 a.m. UTC | #4
On Fri July 24, 2020 5:55 AM, Randy Dunlap wrote: 
> On 7/23/20 8:01 AM, Roy Im wrote:
> > Adds support for the Dialog DA7280 LRA/ERM Haptic Driver with multiple
> > mode and integrated waveform memory and wideband support.
> > It communicates via an I2C bus to the device.
> >
> > Reviewed-by: Jes Sorensen <Jes.Sorensen@gmail.com>.
> >
> > Signed-off-by: Roy Im <roy.im.opensource@diasemi.com>
> >
> > ---
> >
> >
> >  drivers/input/misc/Kconfig  |   13 +
> >  drivers/input/misc/Makefile |    1 +
> >  drivers/input/misc/da7280.c | 1840
> > +++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 1854 insertions(+)
> >  create mode 100644 drivers/input/misc/da7280.c
> >
> 
> > diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
> > new file mode 100644 index 0000000..6e3ead5
> > --- /dev/null
> > +++ b/drivers/input/misc/da7280.c
> > @@ -0,0 +1,1840 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * DA7280 Haptic device driver
> > + *
> > + * Copyright (c) 2020 Dialog Semiconductor.
> > + * Author: Roy Im <Roy.Im.Opensource@diasemi.com>  */
> > +
> > +#include <linux/err.h>
> > +#include <linux/i2c.h>
> > +#include <linux/input.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/module.h>
> > +#include <linux/pwm.h>
> > +#include <linux/regmap.h>
> > +#include <linux/workqueue.h>
> > +#include <linux/uaccess.h>
> > +#include <linux/bitops.h>
> > +#include <linux/bitfield.h>
> > +
> 
> ...
> 
> 
> > +static int da7280_haptic_set_pwm(struct da7280_haptic *haptics, bool
> > +enabled) {
> > +	struct pwm_state state;
> > +	u64 period_mag_multi;
> > +	int error;
> > +
> > +	if (!haptics->gain && enabled) {
> > +		dev_err(haptics->dev,
> > +			"Please set the gain first for the pwm mode\n");
> > +		return -EINVAL;
> > +	}
> > +
> > +	pwm_get_state(haptics->pwm_dev, &state);
> > +	state.enabled = enabled;
> > +	if (enabled) {
> > +		period_mag_multi = (u64)state.period * haptics->gain;
> > +		period_mag_multi >>= MAX_MAGNITUDE_SHIFT;
> > +
> > +		/* The interpretation of duty cycle depends on the acc_en,
> > +		 * it should be between 50% and 100% for acc_en = 0.
> > +		 * See datasheet 'PWM mode' section.
> > +		 */
> 
> from coding-style.rst:
> 
> 	/*
> 	 * This is the preferred style for multi-line
> 	 * comments in the Linux kernel source code.
> 	 * Please use it consistently.
> 	 *
> 	 * Description:  A column of asterisks on the left side,
> 	 * with beginning and ending almost-blank lines.
> 	 */
> 
> (except for networking code)
> 
> Please fix multiple locations.
OK, I will fix them.

> 
> 
> thanks.
> --
> ~Randy

Kind regards,
Roy
Randy Dunlap July 24, 2020, 2:56 a.m. UTC | #5
On 7/23/20 6:54 PM, Roy Im wrote:
> On Fri, July 24, 2020 5:51 AM, Randy Dunlap wrote
>> On 7/23/20 8:01 AM, Roy Im wrote:
>>> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
>>> index 362e8a0..06dc5a3 100644
>>> --- a/drivers/input/misc/Kconfig
>>> +++ b/drivers/input/misc/Kconfig
>>> @@ -869,4 +869,17 @@ config INPUT_STPMIC1_ONKEY
>>>  	  To compile this driver as a module, choose M here: the
>>>  	  module will be called stpmic1_onkey.
>>>
>>> +config INPUT_DA7280_HAPTICS
>>> +	tristate "Dialog Semiconductor DA7280 haptics support"
>>> +	depends on INPUT && I2C
>>> +	select INPUT_FF_MEMLESS
>>> +	select REGMAP_I2C
>>> +	help
>>> +	  Say Y to enable support for the Dialog DA7280 haptics driver.
>>> +	  The haptics can be controlled by I2C communication,
>>> +	  or by PWM input, or by GPI.
>>
>> 	  Is that                GPIO.
>> ?
> The Haptics can be working by GPI(if see from the haptic device), but from the Host it is GPO. Do you think the GPIO is correct?

To me it needs to represent what services/interfaces/facilities are used by this driver that are
provided by the Linux kernel.  If it uses Linux GPIO services, then it should say GPIO --
although I don't see it using any Linux GPIO services.

>>
>> Can the haptics be controlled only by PWM or only by GPI(O)?
>>
>> Just curious: why is I2C required to build the driver if a user is only controlling the device by PWM or GPI?
> 
> I2C is required to control registers and it can be triggered by I2C or PWM or GPI(controlled by host outside this driver), so PWM and GPI are optional.
> With your comments, I think it's better to remove below lines(//remove) to avoid confusion and add PWM as below if you agree.
>          // remove
> 	  The haptics can be controlled by I2C communication,
> 	  or by PWM input, or by GPI.
>          // update, adding || PWM
>          depends on (INPUT && I2C) || PWM

Since <linux/pwm.h> provides stubs for when CONFIG_PWM is not enabled,
it appears that "depends on  PWM" is not required.

I'll leave it up to you. I was just trying to understand better.
It may be that no changes are needed.


thanks.
Roy Im July 24, 2020, 5:47 a.m. UTC | #6
Friday, July 24, 2020 11:57 AM, Randy Dunlap wrote 
> On 7/23/20 6:54 PM, Roy Im wrote:
> > On Fri, July 24, 2020 5:51 AM, Randy Dunlap wrote
> >> On 7/23/20 8:01 AM, Roy Im wrote:
> >>> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> >>> index 362e8a0..06dc5a3 100644
> >>> --- a/drivers/input/misc/Kconfig
> >>> +++ b/drivers/input/misc/Kconfig
> >>> @@ -869,4 +869,17 @@ config INPUT_STPMIC1_ONKEY
> >>>  	  To compile this driver as a module, choose M here: the
> >>>  	  module will be called stpmic1_onkey.
> >>>
> >>> +config INPUT_DA7280_HAPTICS
> >>> +	tristate "Dialog Semiconductor DA7280 haptics support"
> >>> +	depends on INPUT && I2C
> >>> +	select INPUT_FF_MEMLESS
> >>> +	select REGMAP_I2C
> >>> +	help
> >>> +	  Say Y to enable support for the Dialog DA7280 haptics driver.
> >>> +	  The haptics can be controlled by I2C communication,
> >>> +	  or by PWM input, or by GPI.
> >>
> >> 	  Is that                GPIO.
> >> ?
> > The Haptics can be working by GPI(if see from the haptic device), but from the Host it is GPO. Do you think the GPIO is
> correct?
> 
> To me it needs to represent what services/interfaces/facilities are used by this driver that are provided by the Linux kernel.
> If it uses Linux GPIO services, then it should say GPIO -- although I don't see it using any Linux GPIO services.

OK, let me change to GPIO.

> 
> >>
> >> Can the haptics be controlled only by PWM or only by GPI(O)?
> >>
> >> Just curious: why is I2C required to build the driver if a user is only controlling the device by PWM or GPI?
> >
> > I2C is required to control registers and it can be triggered by I2C or PWM or GPI(controlled by host outside this driver),
> so PWM and GPI are optional.
> > With your comments, I think it's better to remove below lines(//remove) to avoid confusion and add PWM as below if
> you agree.
> >          // remove
> > 	  The haptics can be controlled by I2C communication,
> > 	  or by PWM input, or by GPI.
> >          // update, adding || PWM
> >          depends on (INPUT && I2C) || PWM
> 
> Since <linux/pwm.h> provides stubs for when CONFIG_PWM is not enabled, it appears that "depends on  PWM" is not
> required.
> 
> I'll leave it up to you. I was just trying to understand better.
> It may be that no changes are needed.

OK, thanks for your comments. To be clearer, I would like to update as below if you agree
	
	depends on INPUT && I2C
...
	The haptics can be controlled by PWM or GPIO
	with I2C communication.
> 
> 
> thanks.
> --
> ~Randy

Kind regards,
Roy
Randy Dunlap July 24, 2020, 5:48 a.m. UTC | #7
On 7/23/20 10:47 PM, Roy Im wrote:

> OK, thanks for your comments. To be clearer, I would like to update as below if you agree
> 	
> 	depends on INPUT && I2C
> ...
> 	The haptics can be controlled by PWM or GPIO
> 	with I2C communication.

Yes, that sounds good. Thanks.

Patch
diff mbox series

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 362e8a0..06dc5a3 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -869,4 +869,17 @@  config INPUT_STPMIC1_ONKEY
 	  To compile this driver as a module, choose M here: the
 	  module will be called stpmic1_onkey.
 
+config INPUT_DA7280_HAPTICS
+	tristate "Dialog Semiconductor DA7280 haptics support"
+	depends on INPUT && I2C
+	select INPUT_FF_MEMLESS
+	select REGMAP_I2C
+	help
+	  Say Y to enable support for the Dialog DA7280 haptics driver.
+	  The haptics can be controlled by I2C communication,
+	  or by PWM input, or by GPI.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called da7280.
+
 endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index a48e5f2..9cfd6ab 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -25,6 +25,7 @@  obj-$(CONFIG_INPUT_CMA3000)		+= cma3000_d0x.o
 obj-$(CONFIG_INPUT_CMA3000_I2C)		+= cma3000_d0x_i2c.o
 obj-$(CONFIG_INPUT_COBALT_BTNS)		+= cobalt_btns.o
 obj-$(CONFIG_INPUT_CPCAP_PWRBUTTON)	+= cpcap-pwrbutton.o
+obj-$(CONFIG_INPUT_DA7280_HAPTICS)	+= da7280.o
 obj-$(CONFIG_INPUT_DA9052_ONKEY)	+= da9052_onkey.o
 obj-$(CONFIG_INPUT_DA9055_ONKEY)	+= da9055_onkey.o
 obj-$(CONFIG_INPUT_DA9063_ONKEY)	+= da9063_onkey.o
diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
new file mode 100644
index 0000000..6e3ead5
--- /dev/null
+++ b/drivers/input/misc/da7280.c
@@ -0,0 +1,1840 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DA7280 Haptic device driver
+ *
+ * Copyright (c) 2020 Dialog Semiconductor.
+ * Author: Roy Im <Roy.Im.Opensource@diasemi.com>
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pwm.h>
+#include <linux/regmap.h>
+#include <linux/workqueue.h>
+#include <linux/uaccess.h>
+#include <linux/bitops.h>
+#include <linux/bitfield.h>
+
+/* Registers */
+#define DA7280_IRQ_EVENT1                     0x03
+#define DA7280_IRQ_EVENT_WARNING_DIAG         0x04
+#define DA7280_IRQ_EVENT_SEQ_DIAG             0x05
+#define DA7280_IRQ_STATUS1                    0x06
+#define DA7280_IRQ_MASK1                      0x07
+#define DA7280_FRQ_LRA_PER_H                  0x0A
+#define DA7280_FRQ_LRA_PER_L                  0x0B
+#define DA7280_ACTUATOR1                      0x0C
+#define DA7280_ACTUATOR2                      0x0D
+#define DA7280_ACTUATOR3                      0x0E
+#define DA7280_CALIB_V2I_H                    0x0F
+#define DA7280_CALIB_V2I_L                    0x10
+#define DA7280_TOP_CFG1                       0x13
+#define DA7280_TOP_CFG2                       0x14
+#define DA7280_TOP_CFG4                       0x16
+#define DA7280_TOP_INT_CFG1                   0x17
+#define DA7280_TOP_CTL1                       0x22
+#define DA7280_TOP_CTL2                       0x23
+#define DA7280_SEQ_CTL2                       0x28
+#define DA7280_GPI_0_CTL                      0x29
+#define DA7280_GPI_1_CTL                      0x2A
+#define DA7280_GPI_2_CTL                      0x2B
+#define DA7280_MEM_CTL1                       0x2C
+#define DA7280_MEM_CTL2                       0x2D
+#define DA7280_TOP_CFG5                       0x6E
+#define DA7280_IRQ_MASK2                      0x83
+#define DA7280_SNP_MEM_99                     0xE7
+
+/* Register field */
+
+/* DA7280_IRQ_EVENT1 (Address 0x03) */
+#define DA7280_E_SEQ_CONTINUE_MASK		BIT(0)
+#define DA7280_E_UVLO_MASK			BIT(1)
+#define DA7280_E_SEQ_DONE_MASK			BIT(2)
+#define DA7280_E_OVERTEMP_CRIT_MASK		BIT(3)
+#define DA7280_E_SEQ_FAULT_MASK			BIT(4)
+#define DA7280_E_WARNING_MASK			BIT(5)
+#define DA7280_E_ACTUATOR_FAULT_MASK		BIT(6)
+#define DA7280_E_OC_FAULT_MASK			BIT(7)
+
+/* DA7280_IRQ_EVENT_WARNING_DIAG (Address 0x04) */
+#define DA7280_E_OVERTEMP_WARN_MASK             BIT(3)
+#define DA7280_E_MEM_TYPE_MASK                  BIT(4)
+#define DA7280_E_LIM_DRIVE_ACC_MASK             BIT(6)
+#define DA7280_E_LIM_DRIVE_MASK                 BIT(7)
+
+/* DA7280_IRQ_EVENT_PAT_DIAG (Address 0x05) */
+#define DA7280_E_PWM_FAULT_MASK			BIT(5)
+#define DA7280_E_MEM_FAULT_MASK			BIT(6)
+#define DA7280_E_SEQ_ID_FAULT_MASK		BIT(7)
+
+/* DA7280_IRQ_STATUS1 (Address 0x06) */
+#define DA7280_STA_SEQ_CONTINUE_MASK		BIT(0)
+#define DA7280_STA_UVLO_VBAT_OK_MASK		BIT(1)
+#define DA7280_STA_SEQ_DONE_MASK		BIT(2)
+#define DA7280_STA_OVERTEMP_CRIT_MASK		BIT(3)
+#define DA7280_STA_SEQ_FAULT_MASK		BIT(4)
+#define DA7280_STA_WARNING_MASK			BIT(5)
+#define DA7280_STA_ACTUATOR_MASK		BIT(6)
+#define DA7280_STA_OC_MASK			BIT(7)
+
+/* DA7280_IRQ_MASK1 (Address 0x07) */
+#define DA7280_SEQ_CONTINUE_M_MASK		BIT(0)
+#define DA7280_E_UVLO_M_MASK			BIT(1)
+#define DA7280_SEQ_DONE_M_MASK			BIT(2)
+#define DA7280_OVERTEMP_CRIT_M_MASK		BIT(3)
+#define DA7280_SEQ_FAULT_M_MASK			BIT(4)
+#define DA7280_WARNING_M_MASK			BIT(5)
+#define DA7280_ACTUATOR_M_MASK			BIT(6)
+#define DA7280_OC_M_MASK			BIT(7)
+
+/* DA7280_ACTUATOR3 (Address 0x0e) */
+#define DA7280_IMAX_MASK			(31 << 0)
+
+/* DA7280_TOP_CFG1 (Address 0x13) */
+#define DA7280_AMP_PID_EN_MASK			BIT(0)
+#define DA7280_RAPID_STOP_EN_MASK		BIT(1)
+#define DA7280_ACCELERATION_EN_MASK		BIT(2)
+#define DA7280_FREQ_TRACK_EN_MASK		BIT(3)
+#define DA7280_BEMF_SENSE_EN_MASK		BIT(4)
+#define DA7280_ACTUATOR_TYPE_MASK		BIT(5)
+
+/* DA7280_TOP_CFG2 (Address 0x14) */
+#define DA7280_FULL_BRAKE_THR_MASK		(15 << 0)
+#define DA7280_MEM_DATA_SIGNED_MASK		BIT(4)
+
+/* DA7280_TOP_CFG4 (Address 0x16) */
+#define DA7280_TST_CALIB_IMPEDANCE_DIS_MASK	BIT(6)
+#define DA7280_V2I_FACTOR_FREEZE_MASK		BIT(7)
+
+/* DA7280_TOP_INT_CFG1 (Address 0x17) */
+#define DA7280_BEMF_FAULT_LIM_MASK		(3 << 0)
+
+/* DA7280_TOP_CTL1 (Address 0x22) */
+#define DA7280_OPERATION_MODE_MASK		(7 << 0)
+#define DA7280_STANDBY_EN_MASK			BIT(3)
+#define DA7280_SEQ_START_MASK			BIT(4)
+
+/* DA7280_SEQ_CTL2 (Address 0x28) */
+#define DA7280_PS_SEQ_ID_MASK			(15 << 0)
+#define DA7280_PS_SEQ_LOOP_MASK			(15 << 4)
+
+/* DA7280_GPIO_0_CTL (Address 0x29) */
+#define DA7280_GPI0_POLARITY_MASK		(3 << 0)
+#define DA7280_GPI0_MODE_MASK			BIT(2)
+#define DA7280_GPI0_SEQUENCE_ID_MASK		(15 << 3)
+
+/* DA7280_GPIO_1_CTL (Address 0x2a) */
+#define DA7280_GPI1_POLARITY_MASK		(3 << 0)
+#define DA7280_GPI1_MODE_MASK			BIT(2)
+#define DA7280_GPI1_SEQUENCE_ID_MASK		(15 << 3)
+
+/* DA7280_GPIO_2_CTL (Address 0x2b) */
+#define DA7280_GPI2_POLARITY_MASK		(3 << 0)
+#define DA7280_GPI2_MODE_MASK			BIT(2)
+#define DA7280_GPI2_SEQUENCE_ID_MASK		(15 << 3)
+
+/* DA7280_MEM_CTL2 (Address 0x2d) */
+#define DA7280_WAV_MEM_LOCK_MASK		BIT(7)
+
+/* DA7280_TOP_CFG5 (Address 0x6e) */
+#define DA7280_V2I_FACTOR_OFFSET_EN_MASK	BIT(0)
+
+/* DA7280_IRQ_MASK2 (Address 0x83) */
+#define DA7280_ADC_SAT_M_MASK			BIT(7)
+
+/* Controls */
+
+#define DA7280_VOLTAGE_RATE_MAX		6000000
+#define DA7280_VOLTAGE_RATE_STEP	23400
+#define DA7280_NOMMAX_DFT		0x6B
+#define DA7280_ABSMAX_DFT		0x78
+
+#define DA7280_IMPD_MAX			1500000000
+#define DA7280_IMPD_DEFAULT		22000000
+
+#define DA7280_IMAX_DEFAULT		0x0E
+#define DA7280_IMAX_STEP		7200
+#define DA7280_IMAX_LIMIT		252000
+
+#define DA7280_RESONT_FREQH_DFT		0x39
+#define DA7280_RESONT_FREQL_DFT		0x32
+#define DA7280_MIN_RESONAT_FREQ_HZ	50
+#define DA7280_MAX_RESONAT_FREQ_HZ	300
+
+#define DA7280_SEQ_ID_MAX		15
+#define DA7280_SEQ_LOOP_MAX		15
+#define DA7280_GPI_SEQ_ID_DFT		0x0
+
+#define DA7280_SNP_MEM_SIZE		100
+#define DA7280_SNP_MEM_MAX		DA7280_SNP_MEM_99
+
+#define IRQ_NUM				3
+
+#define DA7280_SKIP_INIT		0x100
+
+#define DA7280_FF_EFFECT_COUNT_MAX	15
+
+/* Maximum gain is 0x7fff for PWM mode */
+#define MAX_MAGNITUDE_SHIFT		15
+
+enum da7280_haptic_dev_t {
+	DA7280_LRA	= 0,
+	DA7280_ERM_BAR	= 1,
+	DA7280_ERM_COIN	= 2,
+	DA7280_DEV_MAX,
+};
+
+enum da7280_op_mode {
+	DA7280_INACTIVE		= 0,
+	DA7280_DRO_MODE		= 1,
+	DA7280_PWM_MODE		= 2,
+	DA7280_RTWM_MODE	= 3,
+	DA7280_ETWM_MODE	= 4,
+	DA7280_OPMODE_MAX,
+};
+
+#define DA7280_FF_CONSTANT_DRO	1
+#define DA7280_FF_PERIODIC_PWM	2
+#define DA7280_FF_PERIODIC_RTWM	1
+#define DA7280_FF_PERIODIC_ETWM	2
+
+#define DA7280_FF_PERIODIC_MODE	DA7280_RTWM_MODE
+#define DA7280_FF_CONSTANT_MODE	DA7280_DRO_MODE
+
+enum da7280_custom_effect_param {
+	DA7280_CUSTOM_DATA_SEQ_ID_IDX   = 0,
+	DA7280_CUSTOM_DATA_SEQ_LOOP_IDX = 1,
+	DA7280_CUSTOM_DATA_LEN          = 2,
+};
+
+struct da7280_gpi_ctl {
+	u8 seq_id;
+	u8 mode;
+	u8 polarity;
+};
+
+struct da7280_haptic {
+	struct regmap *regmap;
+	struct input_dev *input_dev;
+	struct device *dev;
+	struct i2c_client *client;
+	struct pwm_device *pwm_dev;
+
+	bool legacy;
+	struct delayed_work work_duration;
+	struct work_struct work_playback;
+	struct work_struct work_setgain;
+	int val;
+	u16 gain;
+	u16 new_gain;
+
+	s16 level;
+
+	u8 dev_type;
+	u8 op_mode;
+	u8 const_op_mode;
+	u8 periodic_op_mode;
+	u16 nommax;
+	u16 absmax;
+	u32 imax;
+	u32 impd;
+	u32 resonant_freq_h;
+	u32 resonant_freq_l;
+	bool bemf_sense_en;
+	bool freq_track_en;
+	bool acc_en;
+	bool rapid_stop_en;
+	bool amp_pid_en;
+	u8 ps_seq_id;
+	u8 ps_seq_loop;
+	struct da7280_gpi_ctl gpi_ctl[3];
+	bool mem_update;
+	u8 snp_mem[DA7280_SNP_MEM_SIZE];
+	u8 enabled;
+	int length_ms;
+};
+
+static bool da7280_volatile_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA7280_IRQ_EVENT1:
+	case DA7280_IRQ_EVENT_WARNING_DIAG:
+	case DA7280_IRQ_EVENT_SEQ_DIAG:
+	case DA7280_IRQ_STATUS1:
+	case DA7280_TOP_CTL1:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config da7280_haptic_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = DA7280_SNP_MEM_MAX,
+	.volatile_reg = da7280_volatile_register,
+};
+
+static int da7280_haptic_mem_update(struct da7280_haptic *haptics)
+{
+	unsigned int val;
+	int error;
+
+	/* The patterns should be updated when haptic is not working */
+	error = regmap_read(haptics->regmap, DA7280_IRQ_STATUS1, &val);
+	if (error)
+		return error;
+	if (val & DA7280_STA_WARNING_MASK) {
+		dev_warn(haptics->dev,
+			 "Warning! Please check HAPTIC status.\n");
+		return -EBUSY;
+	}
+
+	/* Patterns are not updated if the lock bit is enabled */
+	val = 0;
+	error = regmap_read(haptics->regmap, DA7280_MEM_CTL2, &val);
+	if (error)
+		return error;
+	if (~val & DA7280_WAV_MEM_LOCK_MASK) {
+		dev_warn(haptics->dev,
+			 "Please unlock the bit first\n");
+		return -EACCES;
+	}
+
+	/* Set to Inactive mode to make sure safety */
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_OPERATION_MODE_MASK,
+				   0);
+	if (error)
+		return error;
+
+	error = regmap_read(haptics->regmap, DA7280_MEM_CTL1, &val);
+	if (error)
+		return error;
+
+	return regmap_bulk_write(haptics->regmap, val,
+			haptics->snp_mem, DA7280_SNP_MEM_MAX - val + 1);
+}
+
+static int da7280_haptic_set_pwm(struct da7280_haptic *haptics, bool enabled)
+{
+	struct pwm_state state;
+	u64 period_mag_multi;
+	int error;
+
+	if (!haptics->gain && enabled) {
+		dev_err(haptics->dev,
+			"Please set the gain first for the pwm mode\n");
+		return -EINVAL;
+	}
+
+	pwm_get_state(haptics->pwm_dev, &state);
+	state.enabled = enabled;
+	if (enabled) {
+		period_mag_multi = (u64)state.period * haptics->gain;
+		period_mag_multi >>= MAX_MAGNITUDE_SHIFT;
+
+		/* The interpretation of duty cycle depends on the acc_en,
+		 * it should be between 50% and 100% for acc_en = 0.
+		 * See datasheet 'PWM mode' section.
+		 */
+		if (!haptics->acc_en) {
+			period_mag_multi += state.period;
+			period_mag_multi /= 2;
+		}
+
+		state.duty_cycle = period_mag_multi;
+	}
+
+	error = pwm_apply_state(haptics->pwm_dev, &state);
+	if (error)
+		dev_err(haptics->dev, "failed to apply pwm state: %pE\n",
+			ERR_PTR(error));
+
+	return error;
+}
+
+static void da7280_haptic_enable(struct da7280_haptic *haptics)
+{
+	int error = 0;
+
+	if (haptics->enabled)
+		return;
+
+	switch (haptics->op_mode) {
+	case DA7280_DRO_MODE:
+		/* the valid range check when acc_en is enabled */
+		if (haptics->acc_en && haptics->level > 0x7F)
+			haptics->level = 0x7F;
+		else if (haptics->level > 0xFF)
+			haptics->level = 0xFF;
+
+		/* Set driver level
+		 * as a % of ACTUATOR_NOMMAX(nommax)
+		 */
+		error = regmap_write(haptics->regmap,
+				     DA7280_TOP_CTL2,
+				     haptics->level);
+		if (error) {
+			dev_err(haptics->dev,
+				"i2c err %pE for driving level (%d)\n",
+				ERR_PTR(error), haptics->level);
+			return;
+		}
+		break;
+	case DA7280_PWM_MODE:
+		if (da7280_haptic_set_pwm(haptics, true))
+			return;
+		break;
+	case DA7280_RTWM_MODE:
+		/* The pattern will be played by
+		 *  the PS_SEQ_ID and the PS_SEQ_LOOP
+		 */
+	case DA7280_ETWM_MODE:
+		/* The pattern will be played by
+		 * the GPI[N] state, GPI(N)_SEQUENCE_ID
+		 * and the PS_SEQ_LOOP.
+		 * please see the datasheet for the details.
+		 */
+		break;
+	default:
+		dev_err(haptics->dev,
+			"Invalid Mode(%d)\n", haptics->op_mode);
+		return;
+	}
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_OPERATION_MODE_MASK,
+				   haptics->op_mode);
+	if (error) {
+		dev_err(haptics->dev,
+			"op_mode i2c err: %pE\n", ERR_PTR(error));
+		return;
+	}
+
+	if (haptics->op_mode == DA7280_PWM_MODE ||
+	    haptics->op_mode == DA7280_RTWM_MODE) {
+		error = regmap_update_bits(haptics->regmap,
+					   DA7280_TOP_CTL1,
+					   DA7280_SEQ_START_MASK,
+					   DA7280_SEQ_START_MASK);
+		if (error) {
+			dev_err(haptics->dev,
+				"i2c err for sequence triggering : %pE\n",
+				ERR_PTR(error));
+			return;
+		}
+	}
+
+	haptics->enabled = true;
+	if (haptics->length_ms && haptics->op_mode <= DA7280_PWM_MODE)
+		schedule_delayed_work(&haptics->work_duration,
+				      msecs_to_jiffies(haptics->length_ms));
+}
+
+static void da7280_haptic_disable(struct da7280_haptic *haptics)
+{
+	int error;
+
+	if (!haptics->enabled)
+		return;
+
+	/* Set to Inactive mode */
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_OPERATION_MODE_MASK, 0);
+	if (error) {
+		dev_err(haptics->dev,
+			"i2c err for op_mode off : %pE\n", ERR_PTR(error));
+		return;
+	}
+
+	switch (haptics->op_mode) {
+	case DA7280_DRO_MODE:
+		error = regmap_write(haptics->regmap,
+				     DA7280_TOP_CTL2, 0);
+		if (error) {
+			dev_err(haptics->dev,
+				"i2c err for DRO mode off : %pE\n",
+				ERR_PTR(error));
+			return;
+		}
+		break;
+	case DA7280_PWM_MODE:
+		if (da7280_haptic_set_pwm(haptics, false))
+			return;
+		break;
+	case DA7280_RTWM_MODE:
+	case DA7280_ETWM_MODE:
+		error = regmap_update_bits(haptics->regmap,
+					   DA7280_TOP_CTL1,
+					   DA7280_SEQ_START_MASK, 0);
+		if (error) {
+			dev_err(haptics->dev,
+				"i2c err for RTWM or ETWM mode off: %pE\n",
+				ERR_PTR(error));
+			return;
+		}
+		break;
+	default:
+		dev_err(haptics->dev,
+			"Invalid Mode(%d)\n", haptics->op_mode);
+		return;
+	}
+
+	haptics->enabled = false;
+}
+
+static void da7280_haptic_work_duration(struct work_struct *work)
+{
+	struct da7280_haptic *haptics =
+		container_of(work, struct da7280_haptic, work_duration.work);
+
+	da7280_haptic_disable(haptics);
+}
+
+static void da7280_haptic_work_playback(struct work_struct *work)
+{
+	struct da7280_haptic *haptics =
+		container_of(work, struct da7280_haptic, work_playback);
+	int val = haptics->val;
+
+	if (!!val)
+		da7280_haptic_enable(haptics);
+	else
+		da7280_haptic_disable(haptics);
+}
+
+static void da7280_haptic_work_setgain(struct work_struct *work)
+{
+	struct da7280_haptic *haptics =
+		container_of(work, struct da7280_haptic, work_setgain);
+	u16 gain = haptics->new_gain;
+	int error = 0;
+
+	if (gain == 0)
+		return;
+
+	/* DRO and PWM modes support set_gain feature
+	 */
+	switch (haptics->op_mode) {
+	case DA7280_DRO_MODE:
+		if (haptics->acc_en == 1) {
+			haptics->level = (u8)(gain * 0x7F / 0x7fff);
+		} else if (haptics->acc_en == 0) {
+			haptics->level = (u8)(gain * 0xFF / 0x7fff);
+
+			if (gain <= 0x3FFF)
+				haptics->level = haptics->level + 0x80;
+			else if (gain > 0x3FFF)
+				haptics->level = haptics->level - 0x80;
+		} else {
+			dev_err(haptics->dev, "Invalid acc_en %d.\n",
+				haptics->acc_en);
+		}
+
+		/* Set driver level
+		 * as a % of ACTUATOR_NOMMAX(nommax)
+		 */
+		error = regmap_write(haptics->regmap,
+				     DA7280_TOP_CTL2,
+				     haptics->level);
+		if (error) {
+			dev_err(haptics->dev,
+				"i2c err for driving level set: %pE\n",
+				ERR_PTR(error));
+			return;
+		}
+		break;
+	case DA7280_PWM_MODE:
+		haptics->gain = gain;
+		if (haptics->enabled) {
+			if (da7280_haptic_set_pwm(haptics, true))
+				return;
+		}
+		break;
+	default:
+		dev_err(haptics->dev,
+			"Invalid Mode(%d). Change to DRM (Constant) mode.\n",
+			haptics->op_mode);
+		break;
+	}
+}
+
+static int da7280_haptics_upload_effect(struct input_dev *dev,
+					struct ff_effect *effect,
+					struct ff_effect *old)
+{
+	struct da7280_haptic *haptics = input_get_drvdata(dev);
+	s16 data[DA7280_SNP_MEM_SIZE] = {0,};
+	unsigned int val;
+	int tmp, i;
+	int error;
+
+	switch (effect->type) {
+	/* DRO/PWM modes support this type */
+	case FF_CONSTANT:
+		haptics->op_mode = haptics->const_op_mode;
+		/* effect->replay.length should be ms base */
+		haptics->length_ms = effect->replay.length;
+		if (haptics->op_mode == DA7280_DRO_MODE) {
+			tmp = effect->u.constant.level * 254;
+			haptics->level = tmp / 0x7FFF;
+			break;
+		}
+
+		haptics->gain =	(effect->u.constant.level <= 0) ?
+			0 : effect->u.constant.level;
+		break;
+
+	/* RTWM/ETWM modes support this type */
+	case FF_PERIODIC:
+		if (effect->u.periodic.waveform != FF_CUSTOM) {
+			dev_err(haptics->dev,
+				"Only accept FF_CUSTOM type\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * Load the data and check the length.
+		 * the data will be patterns in this case: 3 < X <= 100,
+		 * and will be saved into the waveform memory inside DA728x.
+		 * If X = 2, the data will be PS_SEQ_ID and PS_SEQ_LOOP .
+		 */
+		if (effect->u.periodic.custom_len == DA7280_CUSTOM_DATA_LEN)
+			goto set_id_loop;
+
+		if (effect->u.periodic.custom_len < DA7280_CUSTOM_DATA_LEN ||
+		    effect->u.periodic.custom_len > DA7280_SNP_MEM_SIZE) {
+			dev_err(haptics->dev, "Invalid data size\n");
+			return -EINVAL;
+		}
+
+		if (copy_from_user(data, effect->u.periodic.custom_data,
+				   sizeof(s16) *
+				   effect->u.periodic.custom_len)) {
+			dev_err(haptics->dev, "custom data load error\n");
+			return -EFAULT;
+		}
+
+		memset(haptics->snp_mem, 0, DA7280_SNP_MEM_SIZE);
+
+		for (i = 0; i < effect->u.periodic.custom_len; i++) {
+			if (data[i] <= 0xff) {
+				haptics->snp_mem[i] = (u8)data[i];
+			} else {
+				dev_err(haptics->dev,
+					"Invalid data in the custom data\n");
+				return -EINVAL;
+			}
+		}
+
+		error = da7280_haptic_mem_update(haptics);
+		if (error) {
+			dev_err(haptics->dev,
+				"mem update error: %pE\n", ERR_PTR(error));
+			return error;
+		}
+		break;
+
+set_id_loop:
+		if (copy_from_user(data, effect->u.periodic.custom_data,
+				   sizeof(s16) * DA7280_CUSTOM_DATA_LEN)) {
+			dev_err(haptics->dev,
+				"custom id/loop load error\n");
+			return -EFAULT;
+		}
+
+		haptics->ps_seq_id =
+			data[DA7280_CUSTOM_DATA_SEQ_ID_IDX] <=
+			DA7280_SEQ_ID_MAX ?
+				data[DA7280_CUSTOM_DATA_SEQ_ID_IDX] : 0;
+
+		haptics->ps_seq_loop =
+			data[DA7280_CUSTOM_DATA_SEQ_LOOP_IDX] <=
+			DA7280_SEQ_LOOP_MAX ?
+				data[DA7280_CUSTOM_DATA_SEQ_LOOP_IDX] : 0;
+
+		haptics->op_mode = haptics->periodic_op_mode;
+
+		val = FIELD_PREP(DA7280_PS_SEQ_ID_MASK, haptics->ps_seq_id) |
+			FIELD_PREP(DA7280_PS_SEQ_LOOP_MASK,
+				   haptics->ps_seq_loop);
+		error = regmap_write(haptics->regmap,
+				     DA7280_SEQ_CTL2, val);
+		if (error) {
+			dev_err(haptics->dev,
+				"i2c err for driving level set: %pE\n",
+				ERR_PTR(error));
+			return error;
+		}
+		break;
+
+	default:
+		dev_err(haptics->dev, "Unsupported effect type: %d\n",
+			effect->type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int da7280_haptics_playback(struct input_dev *dev,
+				   int effect_id, int val)
+{
+	struct da7280_haptic *haptics = input_get_drvdata(dev);
+
+	if (!haptics->op_mode) {
+		dev_warn(haptics->dev,
+			 "Any effects are not uploaded yet\n");
+		return -EPERM;
+	}
+
+	haptics->val = val;
+	schedule_work(&haptics->work_playback);
+
+	return 0;
+}
+
+static void da7280_haptics_set_gain(struct input_dev *dev, u16 gain)
+{
+	struct da7280_haptic *haptics = input_get_drvdata(dev);
+
+	if (gain > 0x7fff)
+		gain = 0x7fff;
+
+	haptics->new_gain = gain;
+
+	schedule_work(&haptics->work_setgain);
+}
+
+static int da7280_haptic_open(struct input_dev *dev)
+{
+	struct da7280_haptic *haptics = input_get_drvdata(dev);
+	int error;
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_STANDBY_EN_MASK,
+				   DA7280_STANDBY_EN_MASK);
+	if (error)
+		dev_err(haptics->dev,
+			"Failed to open haptic, i2c error: %pE\n",
+			ERR_PTR(error));
+
+	return error;
+}
+
+static void da7280_haptic_close(struct input_dev *dev)
+{
+	struct da7280_haptic *haptics = input_get_drvdata(dev);
+	int error;
+
+	cancel_delayed_work_sync(&haptics->work_duration);
+	cancel_work_sync(&haptics->work_playback);
+	cancel_work_sync(&haptics->work_setgain);
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_OPERATION_MODE_MASK, 0);
+	if (error)
+		goto error_i2c;
+
+	if (haptics->op_mode == DA7280_DRO_MODE) {
+		error = regmap_write(haptics->regmap,
+				     DA7280_TOP_CTL2, 0);
+
+		if (error)
+			goto error_i2c;
+	}
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_STANDBY_EN_MASK, 0);
+	if (error)
+		goto error_i2c;
+
+	return;
+
+error_i2c:
+	dev_err(haptics->dev, "DA7280-haptic i2c error : %pE\n",
+		ERR_PTR(error));
+}
+
+static u8 da7280_haptic_of_mode_str(struct device *dev,
+				    const char *str)
+{
+	if (!strcmp(str, "LRA"))
+		return DA7280_LRA;
+	else if (!strcmp(str, "ERM-bar"))
+		return DA7280_ERM_BAR;
+	else if (!strcmp(str, "ERM-coin"))
+		return DA7280_ERM_COIN;
+
+	dev_warn(dev, "Invalid string - set to LRA\n");
+	return DA7280_LRA;
+}
+
+static u8 da7280_haptic_of_gpi_mode_str(struct device *dev,
+					const char *str)
+{
+	if (!strcmp(str, "Single-pattern"))
+		return 0;
+	else if (!strcmp(str, "Multi-pattern"))
+		return 1;
+
+	dev_warn(dev, "Invalid string - set to Single-pattern\n");
+	return 0;
+}
+
+static u8 da7280_haptic_of_gpi_pol_str(struct device *dev,
+				       const char *str)
+{
+	if (!strcmp(str, "Rising-edge"))
+		return 0;
+	else if (!strcmp(str, "Falling-edge"))
+		return 1;
+	else if (!strcmp(str, "Both-edge"))
+		return 2;
+
+	dev_warn(dev, "Invalid string - set to Rising-edge\n");
+	return 0;
+}
+
+static u8 da7280_haptic_of_volt_rating_set(u32 val)
+{
+	u32 voltage;
+
+	voltage = val / DA7280_VOLTAGE_RATE_STEP + 1;
+
+	if (voltage > 0xFF)
+		return 0xFF;
+	return (u8)voltage;
+}
+
+static void da7280_parse_properties(struct device *dev,
+				    struct da7280_haptic *haptics)
+{
+	unsigned int i, mem[DA7280_SNP_MEM_SIZE];
+	char gpi_str1[] = "dlg,gpi0-seq-id";
+	char gpi_str2[] = "dlg,gpi0-mode";
+	char gpi_str3[] = "dlg,gpi0-polarity";
+	const char *str;
+	u32 val;
+
+	if (!device_property_read_string(dev, "dlg,actuator-type", &str))
+		haptics->dev_type =
+			da7280_haptic_of_mode_str(dev, str);
+	else /* if no property, then use the mode inside chip */
+		haptics->dev_type = DA7280_DEV_MAX;
+
+	if (device_property_read_u32(dev, "dlg,const-op-mode", &val) >= 0)
+		if (val == DA7280_FF_PERIODIC_PWM)
+			haptics->const_op_mode = DA7280_PWM_MODE;
+		else
+			haptics->const_op_mode = DA7280_DRO_MODE;
+	else
+		haptics->const_op_mode = DA7280_DRO_MODE;
+
+	if (device_property_read_u32(dev, "dlg,periodic-op-mode", &val) >= 0)
+		if (val == DA7280_FF_PERIODIC_ETWM)
+			haptics->periodic_op_mode = DA7280_ETWM_MODE;
+		else
+			haptics->periodic_op_mode = DA7280_RTWM_MODE;
+	else
+		haptics->periodic_op_mode = DA7280_RTWM_MODE;
+
+	if (device_property_read_u32(dev, "dlg,nom-microvolt", &val) >= 0)
+		if (val < DA7280_VOLTAGE_RATE_MAX)
+			haptics->nommax =
+				da7280_haptic_of_volt_rating_set(val);
+		else
+			haptics->nommax = DA7280_SKIP_INIT;
+	else /* if no property, then use the value inside chip */
+		haptics->nommax = DA7280_SKIP_INIT;
+
+	if (device_property_read_u32(dev, "dlg,abs-max-microvolt",
+				     &val) >= 0)
+		if (val < DA7280_VOLTAGE_RATE_MAX)
+			haptics->absmax =
+				da7280_haptic_of_volt_rating_set(val);
+		else
+			haptics->absmax = DA7280_SKIP_INIT;
+	else
+		haptics->absmax = DA7280_SKIP_INIT;
+
+	if (device_property_read_u32(dev, "dlg,imax-microamp", &val) >= 0)
+		if (val < DA7280_IMAX_LIMIT)
+			haptics->imax = (val - 28600)
+					/ DA7280_IMAX_STEP + 1;
+		else
+			haptics->imax = DA7280_IMAX_DEFAULT;
+	else
+		haptics->imax = DA7280_IMAX_DEFAULT;
+
+	if (device_property_read_u32(dev, "dlg,impd-micro-ohms", &val) >= 0)
+		if (val <= DA7280_IMPD_MAX)
+			haptics->impd = val;
+		else
+			haptics->impd = DA7280_IMPD_DEFAULT;
+	else
+		haptics->impd = DA7280_IMPD_DEFAULT;
+
+	if (device_property_read_u32(dev, "dlg,resonant-freq-hz",
+				     &val) >= 0) {
+		if (val < DA7280_MAX_RESONAT_FREQ_HZ &&
+		    val > DA7280_MIN_RESONAT_FREQ_HZ) {
+			haptics->resonant_freq_h =
+				((1000000000 / (val * 1333)) >> 7) & 0xFF;
+			haptics->resonant_freq_l =
+				(1000000000 / (val * 1333)) & 0x7F;
+		} else {
+			haptics->resonant_freq_h =
+				DA7280_RESONT_FREQH_DFT;
+			haptics->resonant_freq_l =
+				DA7280_RESONT_FREQL_DFT;
+		}
+	} else {
+		haptics->resonant_freq_h = DA7280_SKIP_INIT;
+		haptics->resonant_freq_l = DA7280_SKIP_INIT;
+	}
+
+	if (device_property_read_u32(dev, "dlg,ps-seq-id", &val) >= 0)
+		if (val <= DA7280_SEQ_ID_MAX)
+			haptics->ps_seq_id = val;
+		else
+			haptics->ps_seq_id = 0;
+	else /* if no property, set to zero as a default do nothing */
+		haptics->ps_seq_id = 0;
+
+	if (device_property_read_u32(dev, "dlg,ps-seq-loop", &val) >= 0)
+		if (val <= DA7280_SEQ_LOOP_MAX)
+			haptics->ps_seq_loop = val;
+		else
+			haptics->ps_seq_loop = 0;
+	else /* if no property, then do nothing */
+		haptics->ps_seq_loop = 0;
+
+	/* GPI0~2 Control */
+	for (i = 0; i < 3; i++) {
+		gpi_str1[7] = '0' + i;
+		if (device_property_read_u32 (dev, gpi_str1, &val) >= 0)
+			if (val <= DA7280_SEQ_ID_MAX)
+				haptics->gpi_ctl[i].seq_id = val;
+			else
+				haptics->gpi_ctl[i].seq_id =
+					DA7280_GPI_SEQ_ID_DFT + i;
+		else /* if no property, then do nothing */
+			haptics->gpi_ctl[i].seq_id =
+				DA7280_GPI_SEQ_ID_DFT + i;
+
+		gpi_str2[7] = '0' + i;
+		if (!device_property_read_string(dev, gpi_str2, &str))
+			haptics->gpi_ctl[i].mode =
+				da7280_haptic_of_gpi_mode_str(dev, str);
+		else
+			haptics->gpi_ctl[i].mode = 0;
+
+		gpi_str3[7] = '0' + i;
+		if (!device_property_read_string(dev, gpi_str3, &str))
+			haptics->gpi_ctl[i].polarity =
+				da7280_haptic_of_gpi_pol_str(dev, str);
+		else
+			haptics->gpi_ctl[i].polarity = 0;
+	}
+
+	haptics->bemf_sense_en =
+		device_property_read_bool(dev, "dlg,bemf-sens-enable");
+	haptics->freq_track_en =
+		device_property_read_bool(dev, "dlg,freq-track-enable");
+	haptics->acc_en =
+		device_property_read_bool(dev, "dlg,acc-enable");
+	haptics->rapid_stop_en =
+		device_property_read_bool(dev, "dlg,rapid-stop-enable");
+	haptics->amp_pid_en =
+		device_property_read_bool(dev, "dlg,amp-pid-enable");
+
+	if (device_property_read_u32_array(dev, "dlg,mem-array",
+					   &mem[0],
+					   DA7280_SNP_MEM_SIZE) >= 0) {
+		haptics->mem_update = true;
+		memset(haptics->snp_mem, 0, DA7280_SNP_MEM_SIZE);
+		for (i = 0; i < DA7280_SNP_MEM_SIZE; i++) {
+			if (mem[i] <= 0xff) {
+				haptics->snp_mem[i] = (u8)mem[i];
+			} else {
+				dev_err(haptics->dev,
+					"Invalid data in mem-array\n");
+				haptics->mem_update = false;
+				break;
+			}
+		}
+	} else {
+		haptics->mem_update = false;
+	}
+}
+
+static irqreturn_t da7280_irq_handler(int irq, void *data)
+{
+	struct da7280_haptic *haptics = data;
+	struct device *dev = haptics->dev;
+	u8 events[IRQ_NUM];
+	int error;
+
+	/* Check what events have happened */
+	error = regmap_bulk_read(haptics->regmap,
+				 DA7280_IRQ_EVENT1,
+				 events, IRQ_NUM);
+	if (error)
+		goto error_i2c;
+
+	/* Clear events */
+	error = regmap_write(haptics->regmap,
+			     DA7280_IRQ_EVENT1, events[0]);
+	if (error)
+		goto error_i2c;
+
+	if (events[0] & DA7280_E_SEQ_FAULT_MASK) {
+		/* Stop first if Haptic is working
+		 * Otherwise, the fault may happen continually
+		 * even though the bit is cleared.
+		 */
+		error = regmap_update_bits(haptics->regmap,
+					   DA7280_TOP_CTL1,
+					   DA7280_OPERATION_MODE_MASK, 0);
+		if (error)
+			goto error_i2c;
+	}
+
+	if (events[0] & DA7280_E_SEQ_DONE_MASK)
+		haptics->enabled = false;
+
+	if (events[0] & DA7280_E_WARNING_MASK) {
+		if (events[1] & DA7280_E_LIM_DRIVE_MASK ||
+		    events[1] & DA7280_E_LIM_DRIVE_ACC_MASK)
+			dev_warn(dev, "Please reduce the driver level\n");
+		if (events[1] & DA7280_E_MEM_TYPE_MASK)
+			dev_warn(dev, "Please check the mem data format\n");
+		if (events[1] & DA7280_E_OVERTEMP_WARN_MASK)
+			dev_warn(dev, "Over-temperature warning\n");
+	}
+
+	if (events[0] & DA7280_E_SEQ_FAULT_MASK) {
+		if (events[2] & DA7280_E_SEQ_ID_FAULT_MASK)
+			dev_info(dev, "Please reload PS_SEQ_ID & mem data\n");
+		if (events[2] & DA7280_E_MEM_FAULT_MASK)
+			dev_info(dev, "Please reload the mem data\n");
+		if (events[2] & DA7280_E_PWM_FAULT_MASK)
+			dev_info(dev, "Please restart PWM interface\n");
+	}
+
+	return IRQ_HANDLED;
+
+error_i2c:
+	dev_err(dev, "da7280 i2c error: %pE\n", ERR_PTR(error));
+	return IRQ_NONE;
+}
+
+static int da7280_init(struct da7280_haptic *haptics)
+{
+	unsigned int val = 0;
+	u32 v2i_factor;
+	int error, i;
+	u8 mask = 0;
+
+	/* If device type is DA7280_DEV_MAX,
+	 * then just use default value inside chip.
+	 */
+	if (haptics->dev_type == DA7280_DEV_MAX) {
+		error = regmap_read(haptics->regmap, DA7280_TOP_CFG1, &val);
+		if (error)
+			goto error_i2c;
+		if (val & DA7280_ACTUATOR_TYPE_MASK)
+			haptics->dev_type = DA7280_ERM_COIN;
+		else
+			haptics->dev_type = DA7280_LRA;
+	}
+
+	/* Apply user settings */
+	if (haptics->dev_type == DA7280_LRA) {
+		if (haptics->resonant_freq_l != DA7280_SKIP_INIT) {
+			error = regmap_write(haptics->regmap,
+					     DA7280_FRQ_LRA_PER_H,
+					     haptics->resonant_freq_h);
+			if (error)
+				goto error_i2c;
+			error = regmap_write(haptics->regmap,
+					     DA7280_FRQ_LRA_PER_L,
+					     haptics->resonant_freq_l);
+			if (error)
+				goto error_i2c;
+		}
+	} else if (haptics->dev_type == DA7280_ERM_COIN) {
+		error = regmap_update_bits(haptics->regmap,
+					   DA7280_TOP_INT_CFG1,
+					   DA7280_BEMF_FAULT_LIM_MASK, 0);
+		if (error)
+			goto error_i2c;
+
+		mask = DA7280_TST_CALIB_IMPEDANCE_DIS_MASK |
+			DA7280_V2I_FACTOR_FREEZE_MASK;
+		val = DA7280_TST_CALIB_IMPEDANCE_DIS_MASK |
+			DA7280_V2I_FACTOR_FREEZE_MASK;
+		error = regmap_update_bits(haptics->regmap,
+					   DA7280_TOP_CFG4,
+					   mask, val);
+		if (error)
+			goto error_i2c;
+
+		haptics->acc_en = false;
+		haptics->rapid_stop_en = false;
+		haptics->amp_pid_en = false;
+	}
+
+	mask = DA7280_ACTUATOR_TYPE_MASK |
+			DA7280_BEMF_SENSE_EN_MASK |
+			DA7280_FREQ_TRACK_EN_MASK |
+			DA7280_ACCELERATION_EN_MASK |
+			DA7280_RAPID_STOP_EN_MASK |
+			DA7280_AMP_PID_EN_MASK;
+	val = FIELD_PREP(DA7280_ACTUATOR_TYPE_MASK,
+			 (haptics->dev_type ? 1 : 0)) |
+		FIELD_PREP(DA7280_BEMF_SENSE_EN_MASK,
+			   (haptics->bemf_sense_en ? 1 : 0)) |
+		FIELD_PREP(DA7280_FREQ_TRACK_EN_MASK,
+			   (haptics->freq_track_en ? 1 : 0)) |
+		FIELD_PREP(DA7280_ACCELERATION_EN_MASK,
+			   (haptics->acc_en ? 1 : 0)) |
+		FIELD_PREP(DA7280_RAPID_STOP_EN_MASK,
+			   (haptics->rapid_stop_en ? 1 : 0)) |
+		FIELD_PREP(DA7280_AMP_PID_EN_MASK,
+			   (haptics->amp_pid_en ? 1 : 0));
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CFG1, mask, val);
+	if (error)
+		goto error_i2c;
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CFG5,
+				   DA7280_V2I_FACTOR_OFFSET_EN_MASK,
+				   haptics->acc_en ?
+				   DA7280_V2I_FACTOR_OFFSET_EN_MASK : 0);
+	if (error)
+		goto error_i2c;
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CFG2,
+				   DA7280_MEM_DATA_SIGNED_MASK,
+				   haptics->acc_en ?
+				   0 : DA7280_MEM_DATA_SIGNED_MASK);
+	if (error)
+		goto error_i2c;
+
+	if (haptics->nommax != DA7280_SKIP_INIT) {
+		error = regmap_write(haptics->regmap,
+				     DA7280_ACTUATOR1,
+				     haptics->nommax);
+		if (error)
+			goto error_i2c;
+	}
+
+	if (haptics->absmax != DA7280_SKIP_INIT) {
+		error = regmap_write(haptics->regmap, DA7280_ACTUATOR2,
+				     haptics->absmax);
+		if (error)
+			goto error_i2c;
+	}
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_ACTUATOR3,
+				   DA7280_IMAX_MASK,
+				   haptics->imax);
+	if (error)
+		goto error_i2c;
+
+	v2i_factor =
+		haptics->impd * (haptics->imax + 4) / 1610400;
+	error = regmap_write(haptics->regmap,
+			     DA7280_CALIB_V2I_L,
+			     v2i_factor & 0xff);
+	if (error)
+		goto error_i2c;
+	error = regmap_write(haptics->regmap,
+			     DA7280_CALIB_V2I_H,
+			     v2i_factor >> 8);
+	if (error)
+		goto error_i2c;
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_STANDBY_EN_MASK,
+				   DA7280_STANDBY_EN_MASK);
+	if (error)
+		goto error_i2c;
+
+	if (haptics->mem_update) {
+		error = da7280_haptic_mem_update(haptics);
+		if (error)
+			goto error_i2c;
+	}
+
+	/* Set  PS_SEQ_ID and PS_SEQ_LOOP */
+	val = FIELD_PREP(DA7280_PS_SEQ_ID_MASK, haptics->ps_seq_id) |
+		FIELD_PREP(DA7280_PS_SEQ_LOOP_MASK, haptics->ps_seq_loop);
+	error = regmap_write(haptics->regmap,
+			     DA7280_SEQ_CTL2, val);
+	if (error)
+		goto error_i2c;
+
+	/* GPI(N) CTL */
+	for (i = 0; i < 3; i++) {
+		val = FIELD_PREP(DA7280_GPI0_SEQUENCE_ID_MASK,
+				 haptics->gpi_ctl[i].seq_id) |
+			FIELD_PREP(DA7280_GPI0_MODE_MASK,
+				   haptics->gpi_ctl[i].mode) |
+			FIELD_PREP(DA7280_GPI0_POLARITY_MASK,
+				   haptics->gpi_ctl[i].polarity);
+		error = regmap_write(haptics->regmap,
+				     DA7280_GPI_0_CTL + i, val);
+		if (error)
+			goto error_i2c;
+	}
+
+	/* Mask ADC_SAT_M bit as default */
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_IRQ_MASK2,
+				   DA7280_ADC_SAT_M_MASK,
+				   DA7280_ADC_SAT_M_MASK);
+	if (error)
+		goto error_i2c;
+
+	/* Clear Interrupts */
+	error = regmap_write(haptics->regmap, DA7280_IRQ_EVENT1, 0xff);
+	if (error)
+		goto error_i2c;
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_IRQ_MASK1,
+				   DA7280_SEQ_FAULT_M_MASK
+				   | DA7280_SEQ_DONE_M_MASK, 0);
+	if (error)
+		goto error_i2c;
+
+	haptics->enabled = false;
+	return 0;
+
+error_i2c:
+	dev_err(haptics->dev,
+		"haptic init - i2c error: %pE\n", ERR_PTR(error));
+	return error;
+}
+
+/* Valid format for ps_seq_id
+ * echo X > ps_seq_id
+ * ex) echo 2 > /sys/class/..../ps_seq_id
+ * 0 <= X <= 15.
+ */
+static ssize_t ps_seq_id_store(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf,
+			       size_t count)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int set_val;
+	long val = 0xff;
+	int error;
+
+	if (haptics->enabled)
+		return -EBUSY;
+
+	if (kstrtol(&buf[0], 0, &val) < 0)
+		goto err;
+
+	set_val = FIELD_PREP(DA7280_PS_SEQ_ID_MASK, (val & 0xf));
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_SEQ_CTL2,
+				   DA7280_PS_SEQ_ID_MASK,
+				   set_val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to update register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+
+	haptics->ps_seq_id = val & 0xf;
+
+	return count;
+
+err:
+	dev_err(dev, "Invalid input\n");
+	return count;
+}
+
+static ssize_t ps_seq_id_show(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int val;
+	int error;
+
+	error = regmap_read(haptics->regmap, DA7280_SEQ_CTL2, &val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to read register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+	val = FIELD_GET(DA7280_PS_SEQ_ID_MASK, val);
+
+	return sprintf(buf, "ps_seq_id is %d\n", val);
+}
+
+/* Valid format for ps_seq_loop
+ * echo X > ps_seq_loop
+ * ex) echo 2 > /sys/class/..../ps_seq_loop
+ * 0 <= X <= 15.
+ */
+static ssize_t ps_seq_loop_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf,
+				 size_t count)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int set_val;
+	long val = 0xff;
+	int error;
+
+	if (haptics->enabled)
+		return -EBUSY;
+
+	if (kstrtol(&buf[0], 0, &val) < 0)
+		goto err;
+
+	set_val = FIELD_PREP(DA7280_PS_SEQ_LOOP_MASK, (val & 0xf));
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_SEQ_CTL2,
+				   DA7280_PS_SEQ_LOOP_MASK,
+				   set_val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to update register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+
+	haptics->ps_seq_loop = (val & 0xF);
+
+	return count;
+err:
+	dev_err(dev, "Invalid input value!\n");
+	return count;
+}
+
+static ssize_t ps_seq_loop_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int val;
+	int error;
+
+	error = regmap_read(haptics->regmap, DA7280_SEQ_CTL2, &val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to read register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+
+	val = FIELD_GET(DA7280_PS_SEQ_LOOP_MASK, val);
+
+	return sprintf(buf, "ps_seq_loop is %d\n", val);
+}
+
+/* Valid format for GPIx_SEQUENCE_ID
+ * echo X > ./gpi_seq_id0
+ * Range of X: 0 <= X <= 15
+ * ex)
+ *	echo 1 > /sys/class/..../gpi_seq_id0
+ *	echo 2 > /sys/class/..../gpi_seq_id1
+ *	echo 3 > /sys/class/..../gpi_seq_id2
+ */
+static ssize_t gpi_seq_id0_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf,
+				 size_t count)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int set_val;
+	long val = 0xff;
+	int error;
+
+	if (haptics->enabled)
+		return -EBUSY;
+
+	if (kstrtol(&buf[0], 0, &val) < 0)
+		goto err;
+
+	set_val = FIELD_PREP(DA7280_GPI0_SEQUENCE_ID_MASK, (val & 0xf));
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_GPI_0_CTL,
+				   DA7280_GPI0_SEQUENCE_ID_MASK,
+				   set_val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to update register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+
+	haptics->gpi_ctl[0].seq_id = val & 0xf;
+
+	return count;
+
+err:
+	dev_err(dev, "Invalid input\n");
+	return count;
+}
+
+static ssize_t gpi_seq_id0_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int val;
+	int error;
+
+	error = regmap_read(haptics->regmap, DA7280_GPI_0_CTL, &val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to read register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+	val = FIELD_GET(DA7280_GPI0_SEQUENCE_ID_MASK, val);
+
+	return sprintf(buf, "gpi_seq_id0 is %d\n", val);
+}
+
+static ssize_t gpi_seq_id1_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf,
+				 size_t count)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int set_val;
+	long val = 0xff;
+	int error;
+
+	if (haptics->enabled)
+		return -EBUSY;
+
+	if (kstrtol(&buf[0], 0, &val) < 0)
+		goto err;
+
+	set_val = FIELD_PREP(DA7280_GPI1_SEQUENCE_ID_MASK, (val & 0xf));
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_GPI_1_CTL,
+				   DA7280_GPI1_SEQUENCE_ID_MASK,
+				   set_val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to update register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+
+	haptics->gpi_ctl[1].seq_id = val & 0xf;
+
+	return count;
+
+err:
+	dev_err(dev, "Invalid input\n");
+	return count;
+}
+
+static ssize_t gpi_seq_id1_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int val;
+	int error;
+
+	error = regmap_read(haptics->regmap, DA7280_GPI_1_CTL, &val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to read register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+	val = FIELD_GET(DA7280_GPI1_SEQUENCE_ID_MASK, val);
+
+	return sprintf(buf, "gpi_seq_id1 is %d\n", val);
+}
+
+static ssize_t gpi_seq_id2_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf,
+				 size_t count)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int set_val;
+	long val = 0xff;
+	int error;
+
+	if (haptics->enabled)
+		return -EBUSY;
+
+	if (kstrtol(&buf[0], 0, &val) < 0)
+		goto err;
+
+	set_val = FIELD_PREP(DA7280_GPI2_SEQUENCE_ID_MASK, (val & 0xf));
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_GPI_2_CTL,
+				   DA7280_GPI2_SEQUENCE_ID_MASK,
+				   set_val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to update register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+
+	haptics->gpi_ctl[2].seq_id = val & 0xf;
+
+	return count;
+
+err:
+	dev_err(dev, "Invalid input\n");
+	return count;
+}
+
+static ssize_t gpi_seq_id2_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	unsigned int val;
+	int error;
+
+	error = regmap_read(haptics->regmap, DA7280_GPI_2_CTL, &val);
+	if (error) {
+		dev_err(haptics->dev,
+			"failed to read register: %pE\n", ERR_PTR(error));
+		return error;
+	}
+	val = FIELD_GET(DA7280_GPI2_SEQUENCE_ID_MASK, val);
+
+	return sprintf(buf, "gpi_seq_id2 is %d\n", val);
+}
+
+#define MAX_PTN_REGS DA7280_SNP_MEM_SIZE
+#define MAX_USER_INPUT_LEN (5 * DA7280_SNP_MEM_SIZE)
+struct parse_data_t {
+	int len;
+	u8 val[MAX_PTN_REGS];
+};
+
+static int da7280_parse_args(struct device *dev,
+			     char *cmd, struct parse_data_t *ptn)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	static const char ct[] = " \t"; /* space or tab delimits the tokens */
+	int tok_count = 0;	/* total number of tokens parsed */
+	int i = 0, val;
+	char *tok;		/* used to separate tokens */
+
+	ptn->len = 0;
+
+	/* parse the input string */
+	while ((tok = strsep(&cmd, ct)) != NULL) {
+		/* this is a value to be written to the register */
+		if (kstrtouint(tok, 0, &val) < 0) {
+			dev_err(haptics->dev,
+				"failed to read from %s\n", tok);
+			break;
+		}
+
+		if (i < MAX_PTN_REGS) {
+			ptn->val[i] = val;
+			i++;
+		}
+		tok_count++;
+	}
+
+	/* decide whether it is a read or write operation based on the
+	 * value of tok_count and count_flag.
+	 * tok_count = 0: no inputs, invalid case.
+	 * tok_count = 1: write one value.
+	 * tok_count > 1: write multiple values/patterns.
+	 */
+	switch (tok_count) {
+	case 0:
+		return -EINVAL;
+	case 1:
+		ptn->len = 1;
+		break;
+	default:
+		ptn->len = i;
+	}
+	return 0;
+}
+
+static ssize_t
+patterns_store(struct device *dev,
+	       struct device_attribute *attr,
+	       const char *buf,
+	       size_t count)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	char cmd[MAX_USER_INPUT_LEN];
+	struct parse_data_t mem;
+	unsigned int val;
+	int error;
+
+	error = regmap_read(haptics->regmap, DA7280_MEM_CTL1, &val);
+	if (error)
+		return error;
+
+	if (count > MAX_USER_INPUT_LEN)
+		count = MAX_USER_INPUT_LEN;
+	memcpy(cmd, buf, count);
+
+	/* chop of '\n' introduced by echo at the end of the input */
+	if (cmd[count - 1] == '\n')
+		cmd[count - 1] = '\0';
+
+	if (da7280_parse_args(dev, cmd, &mem) < 0)
+		return -EINVAL;
+
+	if (mem.len > DA7280_SNP_MEM_SIZE)
+		return -EINVAL;
+
+	memset(haptics->snp_mem, 0, DA7280_SNP_MEM_SIZE);
+	memcpy(haptics->snp_mem, mem.val, mem.len);
+
+	error = da7280_haptic_mem_update(haptics);
+	if (error)
+		return error;
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(ps_seq_id);
+static DEVICE_ATTR_RW(ps_seq_loop);
+static DEVICE_ATTR_RW(gpi_seq_id0);
+static DEVICE_ATTR_RW(gpi_seq_id1);
+static DEVICE_ATTR_RW(gpi_seq_id2);
+static DEVICE_ATTR_WO(patterns);
+static struct attribute *da7280_sysfs_attr[] = {
+	&dev_attr_ps_seq_id.attr,
+	&dev_attr_ps_seq_loop.attr,
+	&dev_attr_gpi_seq_id0.attr,
+	&dev_attr_gpi_seq_id1.attr,
+	&dev_attr_gpi_seq_id2.attr,
+	&dev_attr_patterns.attr,
+	NULL,
+};
+
+static const struct attribute_group da7280_attr_group = {
+	.attrs = da7280_sysfs_attr,
+};
+
+static int da7280_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct da7280_haptic *haptics;
+	struct input_dev *input_dev;
+	struct pwm_state state;
+	struct ff_device *ff;
+	int error;
+
+	haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL);
+	if (!haptics)
+		return -ENOMEM;
+	haptics->dev = dev;
+
+	if (!client->irq) {
+		dev_err(dev, "No IRQ configured\n");
+		return -EINVAL;
+	}
+
+	da7280_parse_properties(dev, haptics);
+
+	if (haptics->const_op_mode == DA7280_PWM_MODE) {
+		haptics->pwm_dev = devm_pwm_get(dev, NULL);
+		if (IS_ERR(haptics->pwm_dev)) {
+			error = PTR_ERR(haptics->pwm_dev);
+			if (error != -EPROBE_DEFER)
+				dev_err(dev, "unable to request PWM: %pE\n",
+					ERR_PTR(error));
+			return error;
+		}
+
+		/* Sync up PWM state and ensure it is off. */
+		pwm_init_state(haptics->pwm_dev, &state);
+		state.enabled = false;
+		error = pwm_apply_state(haptics->pwm_dev, &state);
+		if (error) {
+			dev_err(dev,
+				"failed to apply initial PWM state: %pE\n",
+				ERR_PTR(error));
+			return error;
+		}
+
+		/* Check PWM period, PWM freq = 1000000 / state.period.
+		 * The valid PWM freq range: 10k ~ 250kHz.
+		 */
+		if (state.period > 100000 || state.period < 4000) {
+			dev_err(dev, "Unsupported PWM period (%u)\n",
+				state.period);
+			return -EINVAL;
+		}
+	}
+
+	INIT_DELAYED_WORK(&haptics->work_duration, da7280_haptic_work_duration);
+	INIT_WORK(&haptics->work_playback, da7280_haptic_work_playback);
+	INIT_WORK(&haptics->work_setgain, da7280_haptic_work_setgain);
+
+	haptics->client = client;
+	i2c_set_clientdata(client, haptics);
+
+	haptics->regmap =
+		devm_regmap_init_i2c(client, &da7280_haptic_regmap_config);
+	if (IS_ERR(haptics->regmap)) {
+		error = PTR_ERR(haptics->regmap);
+		dev_err(dev, "Failed to allocate register map: %pE\n",
+			ERR_PTR(error));
+		return error;
+	}
+
+	error = da7280_init(haptics);
+	if (error) {
+		dev_err(dev, "failed to initialize device\n");
+		return error;
+	}
+
+	/* Initialize input device for haptic device */
+	input_dev = devm_input_allocate_device(dev);
+	if (!input_dev) {
+		dev_err(dev, "failed to allocate input device\n");
+		return -ENOMEM;
+	}
+
+	input_dev->name = "da7280-haptic";
+	input_dev->dev.parent = client->dev.parent;
+	input_dev->open = da7280_haptic_open;
+	input_dev->close = da7280_haptic_close;
+	input_set_drvdata(input_dev, haptics);
+	haptics->input_dev = input_dev;
+
+	input_set_capability(haptics->input_dev, EV_FF, FF_PERIODIC);
+	input_set_capability(haptics->input_dev, EV_FF, FF_CUSTOM);
+	input_set_capability(haptics->input_dev, EV_FF, FF_CONSTANT);
+	input_set_capability(haptics->input_dev, EV_FF, FF_GAIN);
+
+	error = input_ff_create(haptics->input_dev, DA7280_FF_EFFECT_COUNT_MAX);
+	if (error) {
+		dev_err(dev, "create FF input device failed: %pE\n",
+			ERR_PTR(error));
+		return error;
+	}
+
+	ff = input_dev->ff;
+	ff->upload = da7280_haptics_upload_effect;
+	ff->playback = da7280_haptics_playback;
+	ff->set_gain = da7280_haptics_set_gain;
+
+	error = input_register_device(input_dev);
+	if (error) {
+		dev_err(dev, "failed to register input device\n");
+		return error;
+	}
+
+	error = devm_device_add_group(dev, &da7280_attr_group);
+	if (error) {
+		dev_err(dev, "Failed to create sysfs attributes: %pE\n",
+			ERR_PTR(error));
+		return error;
+	}
+
+	error = devm_request_threaded_irq(dev, client->irq, NULL,
+					  da7280_irq_handler,
+					  IRQF_ONESHOT,
+					  "da7280-haptics", haptics);
+	if (error)
+		dev_err(dev, "Failed to request IRQ: %pE\n",
+			ERR_PTR(error));
+
+	return error;
+}
+
+static int __maybe_unused da7280_suspend(struct device *dev)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	int error = 0;
+
+	mutex_lock(&haptics->input_dev->mutex);
+
+	da7280_haptic_disable(haptics);
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_STANDBY_EN_MASK, 0);
+	if (error)
+		dev_err(haptics->dev,
+			"I2C error : %pE\n", ERR_PTR(error));
+
+	mutex_unlock(&haptics->input_dev->mutex);
+	return error;
+}
+
+static int __maybe_unused da7280_resume(struct device *dev)
+{
+	struct da7280_haptic *haptics = dev_get_drvdata(dev);
+	int error = 0;
+
+	mutex_lock(&haptics->input_dev->mutex);
+
+	error = regmap_update_bits(haptics->regmap,
+				   DA7280_TOP_CTL1,
+				   DA7280_STANDBY_EN_MASK,
+				   DA7280_STANDBY_EN_MASK);
+	if (error)
+		dev_err(haptics->dev,
+			"i2c error : %pE\n", ERR_PTR(error));
+
+	mutex_unlock(&haptics->input_dev->mutex);
+	return error;
+}
+
+static const struct of_device_id da7280_of_match[] = {
+	{ .compatible = "dlg,da7280", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, da7280_of_match);
+
+static const struct i2c_device_id da7280_i2c_id[] = {
+	{ "da7280", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, da7280_i2c_id);
+
+static SIMPLE_DEV_PM_OPS(da7280_pm_ops,
+		 da7280_suspend, da7280_resume);
+
+static struct i2c_driver da7280_driver = {
+	.driver = {
+		.name = "da7280",
+		.of_match_table = of_match_ptr(da7280_of_match),
+		.pm = &da7280_pm_ops,
+	},
+	.probe = da7280_probe,
+	.id_table = da7280_i2c_id,
+};
+module_i2c_driver(da7280_driver);
+
+MODULE_DESCRIPTION("DA7280 haptics driver");
+MODULE_AUTHOR("Roy Im <Roy.Im.Opensource@diasemi.com>");
+MODULE_LICENSE("GPL");