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- Initialize GPIO_OE register based on pinmux configuration

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Although AM335x TRM states that GPIO_OE register is not used and just
reflects pads configuration in practice it does control pin behavior
and shoiuld be set in addition to pinmux setup
This commit is contained in:
Oleksandr Tymoshenko 2013-02-27 08:32:34 +00:00
parent 20f4e3e158
commit 5c7269aca4
1 changed files with 14 additions and 0 deletions
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14
sys/arm/ti/ti_gpio.c
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@ -653,6 +653,9 @@ ti_gpio_attach(device_t dev)
struct ti_gpio_softc *sc = device_get_softc(dev);
unsigned int i;
int err = 0;
int pin;
uint32_t flags;
uint32_t reg_oe;
sc->sc_dev = dev;
@ -720,6 +723,17 @@ ti_gpio_attach(device_t dev)
/* Disable interrupts for all pins */
ti_gpio_write_4(sc, i, TI_GPIO_CLEARIRQENABLE1, 0xffffffff);
ti_gpio_write_4(sc, i, TI_GPIO_CLEARIRQENABLE2, 0xffffffff);
/* Init OE registger based on pads configuration */
reg_oe = 0xffffffff;
for (pin = 0; pin < 32; pin++) {
ti_scm_padconf_get_gpioflags(
PINS_PER_BANK*i + pin, &flags);
if (flags & GPIO_PIN_OUTPUT)
reg_oe &= ~(1U << pin);
}
ti_gpio_write_4(sc, i, TI_GPIO_OE, reg_oe);
}
}