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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>
This commit is contained in:
mario.six@gdsys.cc 2016-05-25 15:15:23 +02:00 committed by York Sun
parent 51781783c5
commit 743268f514
3 changed files with 62 additions and 0 deletions
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20
arch/sandbox/include/asm/gpio.h
View File

@ -40,6 +40,26 @@ int sandbox_gpio_get_value(struct udevice *dev, unsigned int offset);
*/
int sandbox_gpio_set_value(struct udevice *dev, unsigned int offset, int value);
/**
* Set or reset the simulated open drain mode of a GPIO (used only in sandbox
* test code)
*
* @param gp GPIO number
* @param value value to set (0 for enabled open drain mode, non-zero for
* disabled)
* @return -1 on error, 0 if ok
*/
int sandbox_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value);
/**
* Return the state of the simulated open drain mode of a GPIO (used only in
* sandbox test code)
*
* @param gp GPIO number
* @return -1 on error, 0 if GPIO is input, >0 if output
*/
int sandbox_gpio_get_open_drain(struct udevice *dev, unsigned offset);
/**
* Return the simulated direction of a GPIO (used only in sandbox test code)
*

35
drivers/gpio/sandbox.c
View File

@ -15,6 +15,7 @@ DECLARE_GLOBAL_DATA_PTR;
/* 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 @@ int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value)
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 @@ static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value)
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 @@ static const struct dm_gpio_ops gpio_sandbox_ops = {
.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,
};

7
test/dm/gpio.c
View File

@ -75,6 +75,13 @@ static int dm_test_gpio(struct unit_test_state *uts)
ut_assertok(ops->set_value(dev, offset, 1));
ut_asserteq(1, ops->get_value(dev, offset));
/* Make it an open drain output, and reset it */
ut_asserteq(0, sandbox_gpio_get_open_drain(dev, offset));
ut_assertok(ops->set_open_drain(dev, offset, 1));
ut_asserteq(1, sandbox_gpio_get_open_drain(dev, offset));
ut_assertok(ops->set_open_drain(dev, offset, 0));
ut_asserteq(0, sandbox_gpio_get_open_drain(dev, offset));
/* Make it an input */
ut_assertok(ops->direction_input(dev, offset));
ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));