Re: [PATCH] gpio: samsung: use pr_* instead of printk

From: Felipe Balbi
Date: Tue Sep 11 2012 - 08:01:44 EST


On Tue, Sep 11, 2012 at 04:02:59PM +0900, Jingoo Han wrote:
> On Tuesday, September 11, 2012 3:48 PM Ryan Mallon wrote
> >
> > On 11/09/12 16:39, Jingoo Han wrote:
> > > On Tuesday, September 11, 2012 3:31 PM Felipe Balbi wrote
> > >
> > >>
> > >> Hi,
> > >>
> > >> On Mon, Sep 10, 2012 at 08:59:11PM +0900, Jingoo Han wrote:
> > >>> This patch uses pr_* instead of printk.
> > >>>
> > >>> Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx>
> > >>> ---
> > >>> drivers/gpio/gpio-samsung.c | 6 +++---
> > >>> 1 files changed, 3 insertions(+), 3 deletions(-)
> > >>>
> > >>> diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
> > >>> index ba126cc..e38d990 100644
> > >>> --- a/drivers/gpio/gpio-samsung.c
> > >>> +++ b/drivers/gpio/gpio-samsung.c
> > >>> @@ -45,7 +45,7 @@
> > >>> #ifndef DEBUG_GPIO
> > >>> #define gpio_dbg(x...) do { } while (0)
> > >>> #else
> > >>> -#define gpio_dbg(x...) printk(KERN_DEBUG x)
> > >>> +#define gpio_dbg(x...) pr_debug(x)
> > >>> #endif
> > >>>
> > >>> int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip,
> > >>> @@ -926,10 +926,10 @@ static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)
> > >>> #ifdef CONFIG_PM
> > >>> if (chip->pm != NULL) {
> > >>> if (!chip->pm->save || !chip->pm->resume)
> > >>> - printk(KERN_ERR "gpio: %s has missing PM functions\n",
> > >>> + pr_err("gpio: %s has missing PM functions\n",
> > >>> gc->label);
> > >>
> > >> I would rather see dev_* conversion instead.
> > >>
> > >> my 2 cents
> > >
> > > Hi Felipe Balbi,
> > >
> > > OK, I will replace printk(KERN_ERR...) with dev_err.
> > > Thank you.
> >
> > I was going to suggest that also, but I don't think that there is a dev
> > pointer to use. The gpio_chip structure has an optional one, but from my
> > quick glance it didn't look like the Samsung driver was using it. I
> > could be wrong though. If I am, go with dev_err (and dev_dbg for
> > replacing the gpio_dbg statements).
>
> Also, I cannot find dev point to use.
> I will use pr_dbg, pr_err.

Now that I look at the driver, the missing dev pointer is just because
gpio-samsung.c is NOT a proper driver. I'd strongly suggest to convert
the driver to a proper platform_driver, but it's your call anyway ;-)

my 2 cents

--
balbi

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