linux-kernel - Re: [PATCH] macintosh/ams-input: switch to using input device polling mode

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Date:   Mon, 11 Nov 2019 16:41:44 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Jean Delvare <jdelvare@...e.com>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] macintosh/ams-input: switch to using input device
 polling mode

On Wed, Oct 02, 2019 at 02:48:54PM -0700, Dmitry Torokhov wrote:
> Now that instances of input_dev support polling mode natively,
> we no longer need to create input_polled_dev instance.

Michael, could you please take this? Or I could push through my tree...

Thanks!

> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>  drivers/macintosh/Kconfig         |  1 -
>  drivers/macintosh/ams/ams-input.c | 37 +++++++++++++++----------------
>  drivers/macintosh/ams/ams.h       |  4 ++--
>  3 files changed, 20 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
> index 574e122ae105..da6a943ad746 100644
> --- a/drivers/macintosh/Kconfig
> +++ b/drivers/macintosh/Kconfig
> @@ -247,7 +247,6 @@ config PMAC_RACKMETER
>  config SENSORS_AMS
>  	tristate "Apple Motion Sensor driver"
>  	depends on PPC_PMAC && !PPC64 && INPUT && ((ADB_PMU && I2C = y) || (ADB_PMU && !I2C) || I2C)
> -	select INPUT_POLLDEV
>  	help
>  	  Support for the motion sensor included in PowerBooks. Includes
>  	  implementations for PMU and I2C.
> diff --git a/drivers/macintosh/ams/ams-input.c b/drivers/macintosh/ams/ams-input.c
> index 06a96b3f11de..0da493d449b2 100644
> --- a/drivers/macintosh/ams/ams-input.c
> +++ b/drivers/macintosh/ams/ams-input.c
> @@ -25,9 +25,8 @@ MODULE_PARM_DESC(invert, "Invert input data on X and Y axis");
>  
>  static DEFINE_MUTEX(ams_input_mutex);
>  
> -static void ams_idev_poll(struct input_polled_dev *dev)
> +static void ams_idev_poll(struct input_dev *idev)
>  {
> -	struct input_dev *idev = dev->input;
>  	s8 x, y, z;
>  
>  	mutex_lock(&ams_info.lock);
> @@ -59,14 +58,10 @@ static int ams_input_enable(void)
>  	ams_info.ycalib = y;
>  	ams_info.zcalib = z;
>  
> -	ams_info.idev = input_allocate_polled_device();
> -	if (!ams_info.idev)
> +	input = input_allocate_device();
> +	if (!input)
>  		return -ENOMEM;
>  
> -	ams_info.idev->poll = ams_idev_poll;
> -	ams_info.idev->poll_interval = 25;
> -
> -	input = ams_info.idev->input;
>  	input->name = "Apple Motion Sensor";
>  	input->id.bustype = ams_info.bustype;
>  	input->id.vendor = 0;
> @@ -75,28 +70,32 @@ static int ams_input_enable(void)
>  	input_set_abs_params(input, ABS_X, -50, 50, 3, 0);
>  	input_set_abs_params(input, ABS_Y, -50, 50, 3, 0);
>  	input_set_abs_params(input, ABS_Z, -50, 50, 3, 0);
> +	input_set_capability(input, EV_KEY, BTN_TOUCH);
>  
> -	set_bit(EV_ABS, input->evbit);
> -	set_bit(EV_KEY, input->evbit);
> -	set_bit(BTN_TOUCH, input->keybit);
> +	error = input_setup_polling(input, ams_idev_poll);
> +	if (error)
> +		goto err_free_input;
>  
> -	error = input_register_polled_device(ams_info.idev);
> -	if (error) {
> -		input_free_polled_device(ams_info.idev);
> -		ams_info.idev = NULL;
> -		return error;
> -	}
> +	input_set_poll_interval(input, 25);
>  
> +	error = input_register_device(input);
> +	if (error)
> +		goto err_free_input;
> +
> +	ams_info.idev = input;
>  	joystick = true;
>  
>  	return 0;
> +
> +err_free_input:
> +	input_free_device(input);
> +	return error;
>  }
>  
>  static void ams_input_disable(void)
>  {
>  	if (ams_info.idev) {
> -		input_unregister_polled_device(ams_info.idev);
> -		input_free_polled_device(ams_info.idev);
> +		input_unregister_device(ams_info.idev);
>  		ams_info.idev = NULL;
>  	}
>  
> diff --git a/drivers/macintosh/ams/ams.h b/drivers/macintosh/ams/ams.h
> index fe8d596f9845..935bdd9cd9a6 100644
> --- a/drivers/macintosh/ams/ams.h
> +++ b/drivers/macintosh/ams/ams.h
> @@ -1,6 +1,6 @@
>  /* SPDX-License-Identifier: GPL-2.0 */
>  #include <linux/i2c.h>
> -#include <linux/input-polldev.h>
> +#include <linux/input.h>
>  #include <linux/kthread.h>
>  #include <linux/mutex.h>
>  #include <linux/spinlock.h>
> @@ -51,7 +51,7 @@ struct ams {
>  #endif
>  
>  	/* Joystick emulation */
> -	struct input_polled_dev *idev;
> +	struct input_dev *idev;
>  	__u16 bustype;
>  
>  	/* calibrated null values */
> -- 
> 2.23.0.444.g18eeb5a265-goog
> 
> 
> -- 
> Dmitry

-- 
Dmitry