Beispiel #1
0
static int i2c_deblock_gpio(struct udevice *bus)
{
	struct gpio_desc gpios[PIN_COUNT];
	int ret, ret0;

	ret = gpio_request_list_by_name(bus, "gpios", gpios,
					ARRAY_SIZE(gpios), GPIOD_IS_IN);
	if (ret != ARRAY_SIZE(gpios)) {
		debug("%s: I2C Node '%s' has no 'gpios' property %s\n",
		      __func__, dev_read_name(bus), bus->name);
		if (ret >= 0) {
			gpio_free_list(bus, gpios, ret);
			ret = -ENOENT;
		}
		goto out;
	}

	ret = pinctrl_select_state(bus, "gpio");
	if (ret) {
		debug("%s: I2C Node '%s' has no 'gpio' pinctrl state. %s\n",
		      __func__, dev_read_name(bus), bus->name);
		goto out_no_pinctrl;
	}

	ret0 = i2c_deblock_gpio_loop(&gpios[PIN_SDA], &gpios[PIN_SCL]);

	ret = pinctrl_select_state(bus, "default");
	if (ret) {
		debug("%s: I2C Node '%s' has no 'default' pinctrl state. %s\n",
		      __func__, dev_read_name(bus), bus->name);
	}

	ret = !ret ? ret0 : ret;

out_no_pinctrl:
	gpio_free_list(bus, gpios, ARRAY_SIZE(gpios));
out:
	return ret;
}
Beispiel #2
0
int gpio_free_list_nodev(struct gpio_desc *desc, int count)
{
	return gpio_free_list(NULL, desc, count);
}
Beispiel #3
0
/* Test that we can find GPIOs using phandles */
static int dm_test_gpio_phandles(struct dm_test_state *dms)
{
	struct gpio_desc desc, desc_list[8], desc_list2[8];
	struct udevice *dev, *gpio_a, *gpio_b;

	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
	ut_asserteq_str("a-test", dev->name);

	ut_assertok(gpio_request_by_name(dev, "test-gpios", 1, &desc, 0));
	ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio_a));
	ut_assertok(uclass_get_device(UCLASS_GPIO, 2, &gpio_b));
	ut_asserteq_str("base-gpios", gpio_a->name);
	ut_asserteq(true, !!device_active(gpio_a));
	ut_asserteq_ptr(gpio_a, desc.dev);
	ut_asserteq(4, desc.offset);
	/* GPIOF_INPUT is the sandbox GPIO driver default */
	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 4, NULL));
	ut_assertok(dm_gpio_free(dev, &desc));

	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 3, &desc,
						  0));
	ut_asserteq_ptr(NULL, desc.dev);
	ut_asserteq(desc.offset, 0);
	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 5, &desc,
						  0));

	/* Last GPIO is ignord as it comes after <0> */
	ut_asserteq(3, gpio_request_list_by_name(dev, "test-gpios", desc_list,
						 ARRAY_SIZE(desc_list), 0));
	ut_asserteq(-EBUSY, gpio_request_list_by_name(dev, "test-gpios",
						      desc_list2,
						      ARRAY_SIZE(desc_list2),
						      0));
	ut_assertok(gpio_free_list(dev, desc_list, 3));
	ut_asserteq(3, gpio_request_list_by_name(dev,  "test-gpios", desc_list,
						 ARRAY_SIZE(desc_list),
						 GPIOD_IS_OUT |
						 GPIOD_IS_OUT_ACTIVE));
	ut_asserteq_ptr(gpio_a, desc_list[0].dev);
	ut_asserteq(1, desc_list[0].offset);
	ut_asserteq_ptr(gpio_a, desc_list[1].dev);
	ut_asserteq(4, desc_list[1].offset);
	ut_asserteq_ptr(gpio_b, desc_list[2].dev);
	ut_asserteq(5, desc_list[2].offset);
	ut_asserteq(1, dm_gpio_get_value(desc_list));
	ut_assertok(gpio_free_list(dev, desc_list, 3));

	ut_asserteq(6, gpio_request_list_by_name(dev, "test2-gpios", desc_list,
						 ARRAY_SIZE(desc_list), 0));
	/* This was set to output previously, so still will be */
	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_a, 1, NULL));

	/* Active low should invert the input value */
	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 6, NULL));
	ut_asserteq(1, dm_gpio_get_value(&desc_list[2]));

	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 7, NULL));
	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 8, NULL));
	ut_asserteq(0, dm_gpio_get_value(&desc_list[4]));
	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 9, NULL));
	ut_asserteq(1, dm_gpio_get_value(&desc_list[5]));


	return 0;
}