On 08:12 Fri 21 Dec , Sascha Hauer wrote:
> On Thu, Dec 20, 2012 at 03:23:59PM +0100, Jean-Christophe PLAGNIOL-VILLARD
> wrote:
> > as today if no request or free provided do not complain
> >
> > if the gpio is not request auto requested at first use
> >
> > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagn...@jcrosoft.com>
> > ---
> > drivers/gpio/gpio.c | 87
> > ++++++++++++++++++++++++++++++++++++++++++++++-----
> > include/gpio.h | 7 +++++
> > 2 files changed, 87 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/gpio/gpio.c b/drivers/gpio/gpio.c
> > index 042a062..e29f0ba 100644
> > --- a/drivers/gpio/gpio.c
> > +++ b/drivers/gpio/gpio.c
> > @@ -1,19 +1,71 @@
> > #include <common.h>
> > #include <gpio.h>
> > #include <errno.h>
> > +#include <malloc.h>
> >
> > static LIST_HEAD(chip_list);
> >
> > -static struct gpio_chip *gpio_desc[ARCH_NR_GPIOS];
> > +struct gpio_info {
> > + struct gpio_chip *chip;
> > + bool requested;
> > + char *label;
> > +};
> > +
> > +static struct gpio_info gpio_desc[ARCH_NR_GPIOS];
> > +
> > +int gpio_request(unsigned gpio, const char *label)
> > +{
> > + struct gpio_info *gi = &gpio_desc[gpio];
> > + struct gpio_chip *chip = gi->chip;
> > + int ret;
> > +
> > + if (!gpio_is_valid(gpio))
> > + return -EINVAL;
> > + if (!chip)
> > + return -EINVAL;
> > + if (gi->requested)
> > + return -ENODEV;
>
> -EBUSY?
>
> > void gpio_set_value(unsigned gpio, int value)
> > {
> > - struct gpio_chip *chip = gpio_desc[gpio];
> > + struct gpio_info *gi = &gpio_desc[gpio];
> > + struct gpio_chip *chip = gi->chip;
> >
> > if (!gpio_is_valid(gpio))
> > return;
> > if (!chip)
> > return;
> > + if (!gi->requested && gpio_request(gpio, "gpio"))
> > + return;
>
> Could you factor out this into a gpio_ensure_requested function? This
> way we would have a single point where the implicit gpio_request calls
> are handled.
ok
Best Regards,
J.
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