Re: [PATCH v1 1/1] pinctrl: intel: Set pin direction properly

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Mon, 2017-01-09 at 17:12 +0200, Jarkko Nikula wrote:
> On 01/09/2017 04:45 PM, Andy Shevchenko wrote:
> > On Mon, 2017-01-09 at 16:29 +0200, Jarkko Nikula wrote:
> > > On 01/02/2017 02:07 PM, Andy Shevchenko wrote:
> > > > There are two bits in the PADCFG0 register to configure
> > > > direction,
> > > > one per
> > > > TX/RX buffers.
> > > > 
> > > > For now we wrongly assume that the GPIO is always requested
> > > > before
> > > > it is being
> > > > used, which is not true when the GPIO is used through irqchip.
> > > > In
> > > > this case the
> > > > GPIO is never requested and we never enable RX buffer for it.
> > > > 
> > > > Fix this by setting both bits accordingly.
> > > > 
> > > > Reported-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
> > > > 
> > 
> > 
> > > > @@ -392,18 +407,11 @@ static int intel_gpio_set_direction(struct
> > > > pinctrl_dev *pctldev,
> > > 
> > > I'm testing this on top of v4.10.0-rc3 and I don't see changes in
> > > PADCFG0 after this patch. I guess reason is that the code doesn't
> > > go
> > > through above functions for the pin that is used through irqchip
> > > but
> > > through intel_gpio_irq_type().
> > > 
> > > Am I missing some another patch or should your patch add
> > > __intel_gpio_set_direction() also there?
> > 
> > The problem you reported about apparently discovers two places to be
> > fixed. This is part 1. Part 2 will be send with GPIO ACPI clean up /
> > bug
> > fix series later.
> > 
> 
> Should the commit log be refined a bit as this patch doesn't fix the 
> issue but prepares for the fix by adding the RX pad control in 
> intel_gpio_set_direction()?

I don't think we need this. Basically I split your Reported-by to the
two patches (okay, I need to check if I put it to another one). 

The problems they solve are kinda independent, but both of them are
parts of the issue you faced.

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy