On Wed, 2013-11-20 at 18:32 -0600, Scott Wood wrote:
> For userspace value setting, it looks like gpiolib blocks the write if
> the pin if FLAG_IS_OUT is set. This suggests that this is an error
> condition for other uses as well. Though, I notice that
> mpc8xxx_gpio_dir_out() calls gpio_set() be
On Wed, 2013-11-20 at 10:54 +0800, Liu Gang wrote:
> On Tue, 2013-11-19 at 16:51 -0600, Scott Wood wrote:
> > > @@ -71,6 +71,7 @@ static int mpc8572_gpio_get(struct gpio_chip *gc,
> > > unsigned int gpio)
> > > struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
> > >
> > > val
On Tue, 2013-11-19 at 16:51 -0600, Scott Wood wrote:
> > @@ -71,6 +71,7 @@ static int mpc8572_gpio_get(struct gpio_chip *gc,
> > unsigned int gpio)
> > struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
> >
> > val = in_be32(mm->regs + GPIO_DAT) & ~in_be32(mm->regs + GPIO_D
On Tue, 2013-11-19 at 16:32 +0100, Anatolij Gustschin wrote:
> On Fri, 15 Nov 2013 15:16:29 +0800
> Liu Gang wrote:
>
> > For MPC8572/MPC8536, the status of GPIOs defined as output
> > cannot be determined by reading GPDAT register, so the code
> > use shadow data register instead. But if the inp
On Fri, 2013-11-15 at 15:16 +0800, Liu Gang wrote:
> For MPC8572/MPC8536, the status of GPIOs defined as output
> cannot be determined by reading GPDAT register, so the code
> use shadow data register instead. But if the input pins are
> asserted high, they will always read high due to the shadow
>
On Fri, 15 Nov 2013 15:16:29 +0800
Liu Gang wrote:
> For MPC8572/MPC8536, the status of GPIOs defined as output
> cannot be determined by reading GPDAT register, so the code
> use shadow data register instead. But if the input pins are
> asserted high, they will always read high due to the shadow
On Fri, Nov 15, 2013 at 8:16 AM, Liu Gang wrote:
> For MPC8572/MPC8536, the status of GPIOs defined as output
> cannot be determined by reading GPDAT register, so the code
> use shadow data register instead. But if the input pins are
> asserted high, they will always read high due to the shadow
>
For MPC8572/MPC8536, the status of GPIOs defined as output
cannot be determined by reading GPDAT register, so the code
use shadow data register instead. But if the input pins are
asserted high, they will always read high due to the shadow
data, even if the pins are set to low.
So the input pins sh
