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SubjectRE: [RESEND PATCH V8 3/3] Input: new da7280 haptic driver
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On Tuesday, February 11, 2020 11:26 PM, Uwe Kleine-König wrote

> On Tue, Feb 11, 2020 at 10:13:24AM +0900, Roy Im wrote:
> > diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c
> > new file mode 100644 index 0000000..4d1d1fc
> > --- /dev/null
> > +++ b/drivers/input/misc/da7280.c
> > @@ -0,0 +1,1688 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * DA7280 Haptic device driver
> > + *
> > + * Copyright (c) 2019 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 "da7280.h"
>
> Don't introduce a header file that is only used once. Better put the definitions into the c file then.

I will put the definitions into the c file.

>
> > [...]
> > +static int da7280_haptic_set_pwm(struct da7280_haptic *haptics) {
> > + struct pwm_args pargs;
> > + u64 period_mag_multi;
> > + unsigned int pwm_duty;
> > + int error;
> > +
> > + pwm_get_args(haptics->pwm_dev, &pargs);
> > + period_mag_multi =
> > + (u64)(pargs.period * haptics->gain);
>
> This cast does not do anything, does it?

I will remove this.

>
> > + if (haptics->acc_en)
> > + pwm_duty =
> > + (unsigned int)(period_mag_multi >> 16);
> > + else
> > + pwm_duty =
> > + (unsigned int)((period_mag_multi >> 16)
> > + + pargs.period) / 2;
> > +
> > + error = pwm_config(haptics->pwm_dev,
> > + pwm_duty, pargs.period);
> > + if (error) {
> > + dev_err(haptics->dev,
> > + "failed to configure pwm : %d\n", error);
> > + return error;
> > + }
> > +
> > + error = pwm_enable(haptics->pwm_dev);
> > + if (error) {
> > + pwm_disable(haptics->pwm_dev);
> > + dev_err(haptics->dev,
> > + "failed to enable haptics pwm device : %d\n", error);
> > + }
>
> You should not use the legacy pwm API. Please stick to pwm_apply_state().
>
> Also consider using %pE for more expressive error messages.

I will replace the legacy pwm API and stick to pwm_apply_state() and consider using the %pE.

>
> Best regards
> Uwe
>
> --
> Pengutronix e.K. | Uwe Kleine-König |
> Industrial Linux Solutions | https://www.pengutronix.de/ |

Hello Uwe,

Thanks for your comments.
I will try to update as you advise.

Best regards,
Roy

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