svn commit: r286165 - head/sys/arm/ti

[Oleksandr Tymoshenko]

Author: gonzo
Date: Sat Aug  1 23:10:36 2015
New Revision: 286165
URL: https://svnweb.freebsd.org/changeset/base/286165

Log:
  Set output pin initial value based on pin's pinmux pullup/pulldown setup
  
  Some of FDT blobs for AM335x-based devices use pinmux pullup/pulldown
  flag to setup initial GPIO ouputp value, e.g. 4DCAPE-43 sets LCD DATAEN
  signal this way. It works for Linux because Linux driver does not enforce
  pin direction until after it's requested by consumer. So input with pullup
  flag set acts as output with GPIO_HIGH value
  
  Reviewed by:	loos

Modified:
  head/sys/arm/ti/ti_gpio.c

Modified: head/sys/arm/ti/ti_gpio.c
==============================================================================
--- head/sys/arm/ti/ti_gpio.c	Sat Aug  1 22:56:42 2015	(r286164)
+++ head/sys/arm/ti/ti_gpio.c	Sat Aug  1 23:10:36 2015	(r286165)
@@ -573,7 +573,7 @@ ti_gpio_bank_init(device_t dev)
 {
 	int pin;
 	struct ti_gpio_softc *sc;
-	uint32_t flags, reg_oe, rev;
+	uint32_t flags, reg_oe, reg_set, rev;
 	clk_ident_t clk;
 
 	sc = device_get_softc(dev);
@@ -607,12 +607,18 @@ ti_gpio_bank_init(device_t dev)
 
 	/* 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)
+		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);
 }