From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Roy Im <roy.im.opensource@diasemi.com>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Brian Masney <masneyb@onstation.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Greg KH <gregkh@linuxfoundation.org>,
Lee Jones <lee.jones@linaro.org>, Luca Weiss <luca@z3ntu.xyz>,
Maximilian Luz <luzmaximilian@gmail.com>,
Pascal PAILLET-LME <p.paillet@st.com>,
Rob Herring <robh@kernel.org>,
Samuel Ortiz <sameo@linux.intel.com>,
Thierry Reding <thierry.reding@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
Support Opensource <support.opensource@diasemi.com>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pwm@vger.kernel.org
Subject: Re: [RESEND PATCH V8 3/3] Input: new da7280 haptic driver
Date: Tue, 11 Feb 2020 15:26:22 +0100 [thread overview]
Message-ID: <20200211142622.5vt34ftdt242agaq@pengutronix.de> (raw)
In-Reply-To: <ba04fc95afbf3d77a49ad6d52ade20fe79a4b7eb.1581383604.git.Roy.Im@diasemi.com>
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.
> [...]
> +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?
> + 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.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
next prev parent reply other threads:[~2020-02-11 14:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 1:13 [RESEND PATCH V8 0/3] da7280: haptic driver submission Roy Im
2020-02-11 1:13 ` [RESEND PATCH V8 1/3] MAINTAINERS: da7280 updates to the Dialog Semiconductor search terms Roy Im
2020-02-11 1:13 ` [RESEND PATCH V8 2/3] dt-bindings: input: Add document bindings for DA7280 Roy Im
2020-02-11 1:13 ` [RESEND PATCH V8 3/3] Input: new da7280 haptic driver Roy Im
2020-02-11 14:26 ` Uwe Kleine-König [this message]
2020-02-14 1:35 ` Roy Im
-- strict thread matches above, loose matches on Subject: below --
2019-12-20 8:26 [RESEND PATCH V8 0/3] da7280: haptic driver submission Roy Im
2019-12-20 8:26 ` [RESEND PATCH V8 3/3] Input: new da7280 haptic driver Roy Im
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