linux-kernel - Re: [PATCH 2/2] input: gpio-keys: Add runtime support

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Date:	Thu, 11 Oct 2012 19:52:07 +0530
From:	Shubhrajyoti Datta <omaplinuxkernel@...il.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	arnd@...db.de, linus.walleij@...ricsson.com,
	Jonas Aaberg <jonas.aberg@...ricsson.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org,
	Philippe Langlais <philippe.langlais@...aro.org>
Subject: Re: [PATCH 2/2] input: gpio-keys: Add runtime support

On Thu, Oct 11, 2012 at 7:45 PM, Lee Jones <lee.jones@...aro.org> wrote:
> From: Jonas Aaberg <jonas.aberg@...ricsson.com>
Some change logs would have helped.

>
> Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
> Cc: linux-input@...r.kernel.org
> Acked-by: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Jonas Aaberg <jonas.aberg@...ricsson.com>
> Signed-off-by: Philippe Langlais <philippe.langlais@...aro.org>
> Reviewed-by: Bengt Jonsson <bengt.g.jonsson@...ricsson.com>
> ---
>  drivers/input/keyboard/gpio_keys.c |   16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
> index 7947315..78de557 100644
> --- a/drivers/input/keyboard/gpio_keys.c
> +++ b/drivers/input/keyboard/gpio_keys.c
> @@ -29,6 +29,7 @@
>  #include <linux/of_platform.h>
>  #include <linux/of_gpio.h>
>  #include <linux/spinlock.h>
> +#include <linux/pm_runtime.h>
>
>  struct gpio_button_data {
>         const struct gpio_keys_button *button;
> @@ -526,6 +527,7 @@ static int gpio_keys_open(struct input_dev *input)
>  {
>         struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
>
> +       pm_runtime_get_sync(input->dev.parent);
I am not an expert of the runtime.

However would be grateful if you explain me what it actually do.

Also I did not see any runtime suspend/ resume handlers populated.
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