static int
ti_gpio_bank_init(device_t dev)
{
int pin;
struct ti_gpio_softc *sc;
uint32_t flags, reg_oe, reg_set, rev;
clk_ident_t clk;
sc = device_get_softc(dev);
/* Enable the interface and functional clocks for the module. */
clk = ti_hwmods_get_clock(dev);
if (clk == INVALID_CLK_IDENT) {
device_printf(dev, "failed to get device id based on ti,hwmods\n");
return (EINVAL);
}
sc->sc_bank = clk - GPIO1_CLK + ti_first_gpio_bank();
ti_prcm_clk_enable(clk);
/*
* Read the revision number of the module. TI don't publish the
* actual revision numbers, so instead the values have been
* determined by experimentation.
*/
rev = ti_gpio_read_4(sc, TI_GPIO_REVISION);
/* Check the revision. */
if (rev != ti_gpio_rev()) {
device_printf(dev, "Warning: could not determine the revision "
"of GPIO module (revision:0x%08x)\n", rev);
return (EINVAL);
}
/* Disable interrupts for all pins. */
ti_gpio_intr_clr(sc, 0xffffffff);
/* Init OE register based on pads configuration. */
reg_oe = 0xffffffff;
reg_set = 0;
for (pin = 0; pin < PINS_PER_BANK; pin++) {
TI_GPIO_GET_FLAGS(dev, pin, &flags);
if (flags & GPIO_PIN_OUTPUT) {
reg_oe &= ~(1UL << pin);
if (flags & GPIO_PIN_PULLUP)
reg_set |= (1UL << pin);
}
}
ti_gpio_write_4(sc, TI_GPIO_OE, reg_oe);
if (reg_set)
ti_gpio_write_4(sc, TI_GPIO_SETDATAOUT, reg_set);
return (0);
}
static int
ti_gpio_bank_init(device_t dev, int bank)
{
int pin;
struct ti_gpio_softc *sc;
uint32_t flags, reg_oe;
sc = device_get_softc(dev);
/* Enable the interface and functional clocks for the module. */
ti_prcm_clk_enable(GPIO0_CLK + ti_first_gpio_bank() + bank);
/*
* Read the revision number of the module. TI don't publish the
* actual revision numbers, so instead the values have been
* determined by experimentation.
*/
sc->sc_revision[bank] = ti_gpio_read_4(sc, bank, TI_GPIO_REVISION);
/* Check the revision. */
if (sc->sc_revision[bank] != ti_gpio_rev()) {
device_printf(dev, "Warning: could not determine the revision "
"of %u GPIO module (revision:0x%08x)\n",
bank, sc->sc_revision[bank]);
return (EINVAL);
}
/* Disable interrupts for all pins. */
ti_gpio_intr_clr(sc, bank, 0xffffffff);
/* Init OE register based on pads configuration. */
reg_oe = 0xffffffff;
for (pin = 0; pin < PINS_PER_BANK; pin++) {
TI_GPIO_GET_FLAGS(dev, PINS_PER_BANK * bank + pin, &flags);
if (flags & GPIO_PIN_OUTPUT)
reg_oe &= ~(1UL << pin);
}
ti_gpio_write_4(sc, bank, TI_GPIO_OE, reg_oe);
return (0);
}
