gpio: tegra: read output value when gpio is set in direction_out

Read the output value when gpio is set for the output mode for
gpio_get_value(). Reading input value in direction out does not
give correct value.

Signed-off-by: Laxman Dewangan <[e-mail]>
Acked-by: Stephen Warren <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-tegra.c

···
 
 static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
+	/* If gpio is in output mode then read from the out value */
+	if ((tegra_gpio_readl(GPIO_OE(offset)) >> GPIO_BIT(offset)) & 1)
+		return (tegra_gpio_readl(GPIO_OUT(offset)) >>
+				GPIO_BIT(offset)) & 0x1;
+
 	return (tegra_gpio_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1;
 }