/*
* Configure the specified GPIO pin.
* The clocks on the necessary ports will be enabled automatically.
*
* Returns 0 on success, -EINVAL otherwise.
*/
int kinetis_gpio_config(const struct kinetis_gpio_dsc *dsc, u32 regval)
{
int rv;
/*
* Verify the function arguments
*/
rv = kinetis_validate_gpio(dsc);
if (rv != 0)
goto out;
/*
* Enable the clock on the port we are going to use
*/
rv = kinetis_periph_enable(port_clock_gate[dsc->port], 1);
if (rv != 0)
goto out;
/*
* Configure the pin
*/
KINETIS_PORT(dsc->port)->pcr[dsc->pin] = regval;
rv = 0;
out:
return rv;
}
/*
* Updates GPIO pin configuration by unmasking PCR register value
*
* Returns 0 on success, -EINVAL otherwise.
*/
int kinetis_gpio_config_unmask(const struct kinetis_gpio_dsc *dsc, u32 mask)
{
int rv;
rv = kinetis_validate_gpio(dsc);
if (rv != 0)
return rv;
KINETIS_PORT(dsc->port)->pcr[dsc->pin] &= ~mask;
return 0;
}