/**
* ti_gpio_pin_setflags - Sets the flags for a given pin
* @dev: gpio device handle
* @pin: the number of the pin
* @flags: the flags to set
*
* The flags of the pin correspond to things like input/output mode, pull-ups,
* pull-downs, etc. This driver doesn't support all flags, only the following:
* - GPIO_PIN_INPUT
* - GPIO_PIN_OUTPUT
* - GPIO_PIN_PULLUP
* - GPIO_PIN_PULLDOWN
*
* LOCKING:
* Internally locks the context
*
* RETURNS:
* Returns 0 on success otherwise an error code
*/
static int
ti_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
{
struct ti_gpio_softc *sc;
uint32_t oe;
sc = device_get_softc(dev);
if (ti_gpio_valid_pin(sc, pin) != 0)
return (EINVAL);
/* Set the GPIO mode and state */
TI_GPIO_LOCK(sc);
if (TI_GPIO_SET_FLAGS(dev, pin, flags) != 0) {
TI_GPIO_UNLOCK(sc);
return (EINVAL);
}
/* If configuring as an output set the "output enable" bit */
oe = ti_gpio_read_4(sc, TI_GPIO_OE);
if (flags & GPIO_PIN_INPUT)
oe |= TI_GPIO_MASK(pin);
else
oe &= ~TI_GPIO_MASK(pin);
ti_gpio_write_4(sc, TI_GPIO_OE, oe);
TI_GPIO_UNLOCK(sc);
return (0);
}
/**
* ti_gpio_pin_setflags - Sets the flags for a given pin
* @dev: gpio device handle
* @pin: the number of the pin
* @flags: the flags to set
*
* The flags of the pin correspond to things like input/output mode, pull-ups,
* pull-downs, etc. This driver doesn't support all flags, only the following:
* - GPIO_PIN_INPUT
* - GPIO_PIN_OUTPUT
* - GPIO_PIN_PULLUP
* - GPIO_PIN_PULLDOWN
*
* LOCKING:
* Internally locks the context
*
* RETURNS:
* Returns 0 on success otherwise an error code
*/
static int
ti_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
{
struct ti_gpio_softc *sc = device_get_softc(dev);
uint32_t bank = (pin / PINS_PER_BANK);
uint32_t mask = (1UL << (pin % PINS_PER_BANK));
uint32_t reg_val;
TI_GPIO_LOCK(sc);
/* Sanity check the pin number is valid */
if ((bank >= ti_max_gpio_banks()) || (sc->sc_mem_res[bank] == NULL)) {
TI_GPIO_UNLOCK(sc);
return (EINVAL);
}
/* Set the GPIO mode and state */
if (TI_GPIO_SET_FLAGS(dev, pin, flags) != 0) {
TI_GPIO_UNLOCK(sc);
return (EINVAL);
}
/* If configuring as an output set the "output enable" bit */
reg_val = ti_gpio_read_4(sc, bank, TI_GPIO_OE);
if (flags & GPIO_PIN_INPUT)
reg_val |= mask;
else
reg_val &= ~mask;
ti_gpio_write_4(sc, bank, TI_GPIO_OE, reg_val);
TI_GPIO_UNLOCK(sc);
return (0);
}