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@xxxxxxxxx>.
>
> Signed-off-by: Roy Im <roy.im.opensource@xxxxxxxxxxx>
>
> ---
>
>
> 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@xxxxxxxxxxx>
> + */
> +
> +#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.
--
~Randy
