Enabled get_function support for dwapb where the function will
return the state of GPIO port.
Signed-off-by: Chin Liang See <chin.liang....@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon....@intel.com>
---
v2: Change to use "if (gpio & BIT(offset))" bit masking.
---
drivers/gpio/dwapb_gpio.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpio/dwapb_gpio.c b/drivers/gpio/dwapb_gpio.c
index 680b11a..7cf2d47 100644
--- a/drivers/gpio/dwapb_gpio.c
+++ b/drivers/gpio/dwapb_gpio.c
@@ -78,11 +78,25 @@ static int dwapb_gpio_set_value(struct udevice *dev,
unsigned pin, int val)
return 0;
}
+static int dwapb_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+ struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
+ u32 gpio;
+
+ gpio = readl(plat->base + GPIO_SWPORT_DDR(plat->bank));
+
+ if (gpio & BIT(offset))
+ return GPIOF_OUTPUT;
+ else
+ return GPIOF_INPUT;
+}
+
static const struct dm_gpio_ops gpio_dwapb_ops = {
.direction_input = dwapb_gpio_direction_input,
.direction_output = dwapb_gpio_direction_output,
.get_value = dwapb_gpio_get_value,
.set_value = dwapb_gpio_set_value,
+ .get_function = dwapb_gpio_get_function,
};
static int gpio_dwapb_probe(struct udevice *dev)
--
2.2.2
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