> On 03/11/2013 07:41 PM, Alexander Shiyan wrote:
> >> On 03/11/2013 07:10 PM, Alexander Shiyan wrote:
> >>> Hello.
> >>>
> >>>> Use dev_pm_ops instead of the deprecated legacy suspend/resume for the
> >>>> max310x driver.
> >>>>
> >>>> Cc: Alexander Shiyan <shc_work@xxxxxxx>
> >>>> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
> >>>> ---
> >>>> drivers/tty/serial/max310x.c | 24 ++++++++++++++++--------
> >>>> 1 file changed, 16 insertions(+), 8 deletions(-)
> >>>>
> >>>> diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
> >>>> index 0c2422c..8941e64 100644
> >>>> --- a/drivers/tty/serial/max310x.c
> >>>> +++ b/drivers/tty/serial/max310x.c
> >>>> @@ -881,12 +881,14 @@ static struct uart_ops max310x_ops = {
> >>>> .verify_port = max310x_verify_port,
> >>>> };
> >>>>
> >>>> -static int max310x_suspend(struct spi_device *spi, pm_message_t state)
> >>>> +#ifdef CONFIG_PM_SLEEP
> >>>> +
> >>>> +static int max310x_suspend(struct device *dev)
> >>>> {
> >>>> int ret;
> >>>> - struct max310x_port *s = dev_get_drvdata(&spi->dev);
> >>>> + struct max310x_port *s = dev_get_drvdata(dev);
> >>>>
> >>>> - dev_dbg(&spi->dev, "Suspend\n");
> >>>> + dev_dbg(dev, "Suspend\n");
> >>>>
> >>>> ret = uart_suspend_port(&s->uart, &s->port);
> >>>>
> >>>> @@ -905,11 +907,11 @@ static int max310x_suspend(struct spi_device *spi, pm_message_t state)
> >>>> return ret;
> >>>> }
> >>>>
> >>>> -static int max310x_resume(struct spi_device *spi)
> >>>> +static int max310x_resume(struct device *dev)
> >>>> {
> >>>> - struct max310x_port *s = dev_get_drvdata(&spi->dev);
> >>>> + struct max310x_port *s = dev_get_drvdata(dev);
> >>>>
> >>>> - dev_dbg(&spi->dev, "Resume\n");
> >>>> + dev_dbg(dev, "Resume\n");
> >>>>
> >>>> if (s->pdata->suspend)
> >>>> s->pdata->suspend(0);
> >>>> @@ -928,6 +930,13 @@ static int max310x_resume(struct spi_device *spi)
> >>>> return uart_resume_port(&s->uart, &s->port);
> >>>> }
> >>>>
> >>>> +static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
> >>>> +#define MAX310X_PM_OPS (&max310x_pm_ops)
> >>>> +
> >>>> +#else
> >>>> +#define MAX310X_PM_OPS NULL
> >>>> +#endif
> >>>> +
> >>>> #ifdef CONFIG_GPIOLIB
> >>>> static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset)
> >>>> {
> >>>> @@ -1242,11 +1251,10 @@ static struct spi_driver max310x_driver = {
> >>>> .driver = {
> >>>> .name = "max310x",
> >>>> .owner = THIS_MODULE,
> >>>> + .pm = MAX310X_PM_OPS,
> >>>
> >>> Check for CONFIG_PM_SLEEP not necessary at all.
> >>> <linux/pm.h> will do all for us.
> >>
> >> No it wont, you'll end up with a dev_pm_ops struct full of zeros and two
> > I.e. NULL, it is OK.
>
> But what's the point of keeping it around?
This allows you to keep checking the code at compile time,
as well as macro IS_ENABLED() inside the code.
#ifdef does not allow this.
>
> >
> >> warnings from your compiler about unused functions.
> > I think attribute "__maybe_unused" can help here.
>
> Or a #ifdef
>
> >
> >>>> },
> >>>> .probe = max310x_probe,
> >>>> .remove = max310x_remove,
> >>>> - .suspend = max310x_suspend,
> >>>> - .resume = max310x_resume,
> >>>> .id_table = max310x_id_table,
> >>>> };
> >>>> module_spi_driver(max310x_driver);
> >>>> --
> >>>> 1.8.0
---
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