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Input: gpio_keys - add hooks to enable/disable device 

Allow platform code to specify callbcks that will be invoked when
input device is opened or closed, allowing, for example, to enable
the device.

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
hifive-unleashed-5.1
Shubhrajyoti D 2010-08-03 19:44:40 -07:00 committed by Dmitry Torokhov
parent 448cd1664a
commit 173bdd746b
2 changed files with 24 additions and 0 deletions
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22
drivers/input/keyboard/gpio_keys.c
View File

@ -39,6 +39,8 @@ struct gpio_keys_drvdata {
struct input_dev *input;
struct mutex disable_lock;
unsigned int n_buttons;
int (*enable)(struct device *dev);
void (*disable)(struct device *dev);
struct gpio_button_data data[0];
};
@ -423,6 +425,21 @@ fail2:
return error;
}
static int gpio_keys_open(struct input_dev *input)
{
struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
return ddata->enable ? ddata->enable(input->dev.parent) : 0;
}
static void gpio_keys_close(struct input_dev *input)
{
struct gpio_keys_drvdata *ddata = input_get_drvdata(input);
if (ddata->disable)
ddata->disable(input->dev.parent);
}
static int __devinit gpio_keys_probe(struct platform_device *pdev)
{
struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
@ -444,13 +461,18 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
ddata->input = input;
ddata->n_buttons = pdata->nbuttons;
ddata->enable = pdata->enable;
ddata->disable = pdata->disable;
mutex_init(&ddata->disable_lock);
platform_set_drvdata(pdev, ddata);
input_set_drvdata(input, ddata);
input->name = pdev->name;
input->phys = "gpio-keys/input0";
input->dev.parent = &pdev->dev;
input->open = gpio_keys_open;
input->close = gpio_keys_close;
input->id.bustype = BUS_HOST;
input->id.vendor = 0x0001;

2
include/linux/gpio_keys.h
View File

@ -17,6 +17,8 @@ struct gpio_keys_platform_data {
struct gpio_keys_button *buttons;
int nbuttons;
unsigned int rep:1; /* enable input subsystem auto repeat */
int (*enable)(struct device *dev);
void (*disable)(struct device *dev);
};
#endif