Re: [PATCH v2] leds: leds-gpio: adopt pinctrl support

[Tony Lindgren <tony@atomide.com>]

* Marek Vasut <marex@denx.de> [120905 19:05]:
> Hi Tony,
> 
> > * Marek Vasut <marex@denx.de> [120904 20:13]:
> > > Dear Bryan Wu,
> > > 
> > > > On Sat, Sep 1, 2012 at 4:16 PM, AnilKumar Ch <anilkumar@ti.com> wrote:
> > > > > Adopt pinctrl support to leds-gpio driver based on leds-gpio
> > > > > device pointer, pinctrl driver configure SoC pins to GPIO
> > > > > mode according to definitions provided in .dts file.
> > > > 
> > > > Thanks for this, actually Marek Vasut submitted a similar patch
> > > > before. I'm pretty fine with this patch.
> > > 
> > > Thanks for submitting this actually ... I didn't have time to properly
> > > investigate this.
> > > 
> > > > But without proper DT setting, it will also give us warning I think.
> > > > or we can provide some dummy functions as a temp solution as Shawn
> > > > pointed out before.
> > > 
> > > But this driver is also used on hardware that's not yet coverted to DT,
> > > so I'd say dev_warn() if CONFIG_OF is enabled and otherwise simply go on
> > > ? Actually, can we not skip whole this pinctrl thing if CONFIG_OF is
> > > disabled? Actually (2), what's the relationship between OF and pinctrl?
> > 
> > The warning should be pinctrl related as the pinctrl drivers may not be
> > device tree based drivers.
> 
> Exactly my concern. Also the warning shouldnt be present on systems where 
> pinctrl is disabled.

But pinctrl_get_select() returns 0 in include/linux/pinctrl/consumer.h if
CONFIG_PINCTRL is not selected, so no warning is produced AFAIK ;)

Or do you get some warning if CONFIG_PINCTRL is not selected for your
hardware?

Tony