Hi Roy,
On Wed, Jul 29, 2020 at 11:59:40AM +0900, 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.
A few questions/suggestions...
>
> Reviewed-by: Jes Sorensen <jes.soren...@gmail.com>.
>
> Signed-off-by: Roy Im <roy.im.opensou...@diasemi.com>
>
> ---
> v18:
> - Corrected comments in Kconfig
> - Updated to preferred style for multi line comments in c file.
> 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
I believe the %pE is to format an escaped buffer, you probably want to
%pe (lowercase) to print errors. I am also not quite sure if we want to
use it in cases when we have non-pointer error, or we should stick with
%d as most of the kernel does.
...
> +
> +/* DA7280_ACTUATOR3 (Address 0x0e) */
> +#define DA7280_IMAX_MASK (31 << 0)
We have GENMASK(h,l) macro in include/linux/bits.h that could be used
here and in other mask definitions.
> +
> + bool legacy;
> + struct delayed_work work_duration;
> + struct work_struct work_playback;
> + struct work_struct work_setgain;
How do we ensure that all these works do not clash with each other?
As far as I can see we could have the "duration" work executing
simultaneously with playback...
> +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");
"No effects have been uploaded"?
> + return -EPERM;
I'd say EINVAL.
> +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);
Should this be a binary attribute instead of having string parsing in
the kernel?
Thanks.
--
Dmitry
