dm: test: Add GPIO open drain tests
Add some tests for the new open drain setting feature of the GPIO
uclass, and extend the capabilities of the sandbox GPIO driver
accordingly.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c
index a9b1efcd..f6435a0 100644
--- a/drivers/gpio/sandbox.c
+++ b/drivers/gpio/sandbox.c
@@ -15,6 +15,7 @@
/* Flags for each GPIO */
#define GPIOF_OUTPUT (1 << 0) /* Currently set as an output */
#define GPIOF_HIGH (1 << 1) /* Currently set high */
+#define GPIOF_ODR (1 << 2) /* Currently set to open drain mode */
struct gpio_state {
const char *label; /* label given by requester */
@@ -70,6 +71,16 @@
return set_gpio_flag(dev, offset, GPIOF_HIGH, value);
}
+int sandbox_gpio_get_open_drain(struct udevice *dev, unsigned offset)
+{
+ return get_gpio_flag(dev, offset, GPIOF_ODR);
+}
+
+int sandbox_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
+{
+ return set_gpio_flag(dev, offset, GPIOF_ODR, value);
+}
+
int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
{
return get_gpio_flag(dev, offset, GPIOF_OUTPUT);
@@ -124,6 +135,28 @@
return sandbox_gpio_set_value(dev, offset, value);
}
+/* read GPIO ODR value of port 'offset' */
+static int sb_gpio_get_open_drain(struct udevice *dev, unsigned offset)
+{
+ debug("%s: offset:%u\n", __func__, offset);
+
+ return sandbox_gpio_get_open_drain(dev, offset);
+}
+
+/* write GPIO ODR value to port 'offset' */
+static int sb_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
+{
+ debug("%s: offset:%u, value = %d\n", __func__, offset, value);
+
+ if (!sandbox_gpio_get_direction(dev, offset)) {
+ printf("sandbox_gpio: error: set_open_drain on input gpio %u\n",
+ offset);
+ return -1;
+ }
+
+ return sandbox_gpio_set_open_drain(dev, offset, value);
+}
+
static int sb_gpio_get_function(struct udevice *dev, unsigned offset)
{
if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
@@ -154,6 +187,8 @@
.direction_output = sb_gpio_direction_output,
.get_value = sb_gpio_get_value,
.set_value = sb_gpio_set_value,
+ .get_open_drain = sb_gpio_get_open_drain,
+ .set_open_drain = sb_gpio_set_open_drain,
.get_function = sb_gpio_get_function,
.xlate = sb_gpio_xlate,
};