Date: Wed, 27 Feb 2013 08:32:35 +0000 (UTC) From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r247390 - head/sys/arm/ti Message-ID: <201302270832.r1R8WZmP074995@svn.freebsd.org>
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Author: gonzo Date: Wed Feb 27 08:32:34 2013 New Revision: 247390 URL: http://svnweb.freebsd.org/changeset/base/247390 Log: - 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 Modified: head/sys/arm/ti/ti_gpio.c Modified: head/sys/arm/ti/ti_gpio.c ============================================================================== --- head/sys/arm/ti/ti_gpio.c Wed Feb 27 07:34:09 2013 (r247389) +++ head/sys/arm/ti/ti_gpio.c Wed Feb 27 08:32:34 2013 (r247390) @@ -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); } }
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