Re: [PATCH 2/5] extcon: gpio: Convert the driver to use gpio desc API's

[George Cherian <george.cherian@xxxxxx>]

On 09/22/2014 01:37 PM, Chanwoo Choi wrote:
> Hi George,
>
> This patch removes 'gpio_active_low' field of struct gpio_extcon_data.
> But, include/linux/extcon-gpio.h has the description of 'gpio_active_low' field.
Yes didn't want the platform data users to break.
Actually I couldn't find any platform users for this driver. Could you 
please point me to
one if in case I missed it. If non present then why cant we get rid of 
platform data altogether.
> Also,
> This patch has not included the any description/comment of removing 'gpio_active_low'.
>
> Also,
> How to set 'FLAG_ACTIVE_LOW' bit for gpio when using platform data?
Now that we are using gpiod_* API's  we need not check for 
gpio_active_low from this driver.

> This patch don't call 'set_bit()' function to set FLAG_ACTIVE_LOW flag.
>
> Thanks,
> Chanwoo Choi
>
> On 09/09/2014 01:14 PM, George Cherian wrote:
> > Convert the driver to use gpiod_* API's.
> >
> > Signed-off-by: George Cherian <george.cherian@xxxxxx>
> > ---
> >   drivers/extcon/extcon-gpio.c | 18 +++++++-----------
> >   1 file changed, 7 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
> > index 72f19a3..25269f6 100644
> > --- a/drivers/extcon/extcon-gpio.c
> > +++ b/drivers/extcon/extcon-gpio.c
> > @@ -33,8 +33,7 @@
> >   
> >   struct gpio_extcon_data {
> >   	struct extcon_dev *edev;
> > -	unsigned gpio;
> > -	bool gpio_active_low;
> > +	struct gpio_desc *gpiod;
> >   	const char *state_on;
> >   	const char *state_off;
> >   	int irq;
> > @@ -50,9 +49,7 @@ static void gpio_extcon_work(struct work_struct *work)
> >   		container_of(to_delayed_work(work), struct gpio_extcon_data,
> >   			     work);
> >   
> > -	state = gpio_get_value(data->gpio);
> > -	if (data->gpio_active_low)
> > -		state = !state;
> > +	state = gpiod_get_value(data->gpiod);
> >   	extcon_set_state(data->edev, state);
> >   }
> >   
> > @@ -106,22 +103,21 @@ static int gpio_extcon_probe(struct platform_device *pdev)
> >   	}
> >   	extcon_data->edev->name = pdata->name;
> >   
> > -	extcon_data->gpio = pdata->gpio;
> > -	extcon_data->gpio_active_low = pdata->gpio_active_low;
> > +	extcon_data->gpiod = gpio_to_desc(pdata->gpio);
> >   	extcon_data->state_on = pdata->state_on;
> >   	extcon_data->state_off = pdata->state_off;
> >   	extcon_data->check_on_resume = pdata->check_on_resume;
> >   	if (pdata->state_on && pdata->state_off)
> >   		extcon_data->edev->print_state = extcon_gpio_print_state;
> >   
> > -	ret = devm_gpio_request_one(&pdev->dev, extcon_data->gpio, GPIOF_DIR_IN,
> > +	ret = devm_gpio_request_one(&pdev->dev, pdata->gpio, GPIOF_DIR_IN,
> >   				    pdev->name);
> >   	if (ret < 0)
> >   		return ret;
> >   
> >   	if (pdata->debounce) {
> > -		ret = gpio_set_debounce(extcon_data->gpio,
> > -					pdata->debounce * 1000);
> > +		ret = gpiod_set_debounce(extcon_data->gpiod,
> > +					 pdata->debounce * 1000);
> >   		if (ret < 0)
> >   			extcon_data->debounce_jiffies =
> >   				msecs_to_jiffies(pdata->debounce);
> > @@ -133,7 +129,7 @@ static int gpio_extcon_probe(struct platform_device *pdev)
> >   
> >   	INIT_DELAYED_WORK(&extcon_data->work, gpio_extcon_work);
> >   
> > -	extcon_data->irq = gpio_to_irq(extcon_data->gpio);
> > +	extcon_data->irq = gpiod_to_irq(extcon_data->gpiod);
> >   	if (extcon_data->irq < 0)
> >   		return extcon_data->irq;
> >   

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