diff options
author | gonzo <gonzo@FreeBSD.org> | 2013-02-27 08:32:34 +0000 |
---|---|---|
committer | gonzo <gonzo@FreeBSD.org> | 2013-02-27 08:32:34 +0000 |
commit | b39d0df4c94f25811ed1ba6e9b00f5ff18ba9509 (patch) | |
tree | 47bee5a7dc419cec7e6f22b51c1323ba7d473230 /sys/arm | |
parent | 4bffdc6be720eb93176e86c7b9c1c54e8749ebb5 (diff) | |
download | FreeBSD-src-b39d0df4c94f25811ed1ba6e9b00f5ff18ba9509.zip FreeBSD-src-b39d0df4c94f25811ed1ba6e9b00f5ff18ba9509.tar.gz |
- Initialize GPIO_OE register based on pinmux configuration
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
Diffstat (limited to 'sys/arm')
-rw-r--r-- | sys/arm/ti/ti_gpio.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/arm/ti/ti_gpio.c b/sys/arm/ti/ti_gpio.c index 58de516..aa9bb8e 100644 --- a/sys/arm/ti/ti_gpio.c +++ b/sys/arm/ti/ti_gpio.c @@ -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); } } |