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test: gpio: Add tests for the managed API

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Add a test to verify that GPIOs can be acquired/released using the managed
API. Also check that the GPIOs are released when the consumer device is
removed.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
This commit is contained in:
Jean-Jacques Hiblot 2020-09-11 13:43:35 +05:30 committed by Tom Rini
parent d4b722e3a8
commit 88e6a60e4a
4 changed files with 116 additions and 4 deletions
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10
arch/sandbox/dts/test.dts
View File

@ -121,6 +121,9 @@
<&gpio_c 5 GPIO_IN>,
<&gpio_c 6 (GPIO_ACTIVE_LOW|GPIO_OUT|GPIO_OPEN_DRAIN)>,
<&gpio_c 7 (GPIO_ACTIVE_LOW|GPIO_OUT|GPIO_OPEN_SOURCE)>;
test4-gpios = <&gpio_a 14>, <&gpio_b 4 1 3 2 1>;
test5-gpios = <&gpio_a 19>;
int-value = <1234>;
uint-value = <(-1234)>;
int64-value = /bits/ 64 <0x1111222233334444>;
@ -270,6 +273,13 @@
compatible = "denx,u-boot-devres-test";
};
another-test {
reg = <0 2>;
compatible = "denx,u-boot-fdt-test";
test4-gpios = <&gpio_a 14>, <&gpio_b 4 1 3 2 1>;
test5-gpios = <&gpio_a 19>;
};
acpi_test1: acpi-test {
compatible = "denx,u-boot-acpi-test";
acpi-ssdt-test-data = "ab";

2
test/dm/bus.c
View File

@ -120,7 +120,7 @@ UCLASS_DRIVER(testbus) = {
/* Test that we can probe for children */
static int dm_test_bus_children(struct unit_test_state *uts)
{
int num_devices = 8;
int num_devices = 9;
struct udevice *bus;
struct uclass *uc;

102
test/dm/gpio.c
View File

@ -10,6 +10,7 @@
#include <malloc.h>
#include <acpi/acpi_device.h>
#include <asm/gpio.h>
#include <dm/device-internal.h>
#include <dm/root.h>
#include <dm/test.h>
#include <dm/util.h>
@ -480,3 +481,104 @@ static int dm_test_gpio_get_acpi_irq(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_gpio_get_acpi_irq, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
/* Test that we can get/release GPIOs using managed API */
static int dm_test_gpio_devm(struct unit_test_state *uts)
{
static const u32 flags = GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE;
struct gpio_desc *desc1, *desc2, *desc3, *desc_err;
struct udevice *dev;
struct udevice *dev2;
ut_assertok(uclass_get_device_by_name(UCLASS_TEST_FDT, "a-test",
&dev));
ut_assertok(uclass_get_device_by_name(UCLASS_TEST_FDT, "another-test",
&dev2));
/* Get 3 GPIOs from 'a-test' dev */
desc1 = devm_gpiod_get_index(dev, "test4", 0, flags);
ut_assert(!IS_ERR(desc1));
desc2 = devm_gpiod_get_index(dev, "test4", 1, flags);
ut_assert(!IS_ERR(desc2));
desc3 = devm_gpiod_get_index_optional(dev, "test5", 0, flags);
ut_assert(!IS_ERR(desc3));
ut_assert(desc3);
/*
* Try get the same 3 GPIOs from 'a-test' and 'another-test' devices.
* check that it fails
*/
desc_err = devm_gpiod_get_index(dev, "test4", 0, flags);
ut_asserteq(-EBUSY, PTR_ERR(desc_err));
desc_err = devm_gpiod_get_index(dev2, "test4", 0, flags);
ut_asserteq(-EBUSY, PTR_ERR(desc_err));
desc_err = devm_gpiod_get_index(dev, "test4", 1, flags);
ut_asserteq(-EBUSY, PTR_ERR(desc_err));
desc_err = devm_gpiod_get_index(dev2, "test4", 1, flags);
ut_asserteq(-EBUSY, PTR_ERR(desc_err));
desc_err = devm_gpiod_get_index_optional(dev, "test5", 0, flags);
ut_asserteq_ptr(NULL, desc_err);
desc_err = devm_gpiod_get_index_optional(dev2, "test5", 0, flags);
ut_asserteq_ptr(NULL, desc_err);
/* Try get GPIOs outside of the list */
desc_err = devm_gpiod_get_index(dev, "test4", 2, flags);
ut_assert(IS_ERR(desc_err));
desc_err = devm_gpiod_get_index_optional(dev, "test5", 1, flags);
ut_asserteq_ptr(NULL, desc_err);
/* Manipulate the GPIOs */
ut_assertok(dm_gpio_set_value(desc1, 1));
ut_asserteq(1, dm_gpio_get_value(desc1));
ut_assertok(dm_gpio_set_value(desc1, 0));
ut_asserteq(0, dm_gpio_get_value(desc1));
ut_assertok(dm_gpio_set_value(desc2, 1));
ut_asserteq(1, dm_gpio_get_value(desc2));
ut_assertok(dm_gpio_set_value(desc2, 0));
ut_asserteq(0, dm_gpio_get_value(desc2));
ut_assertok(dm_gpio_set_value(desc3, 1));
ut_asserteq(1, dm_gpio_get_value(desc3));
ut_assertok(dm_gpio_set_value(desc3, 0));
ut_asserteq(0, dm_gpio_get_value(desc3));
/* Check that the GPIO cannot be owned by more than one device */
desc_err = devm_gpiod_get_index(dev2, "test4", 0, flags);
ut_asserteq(-EBUSY, PTR_ERR(desc_err));
desc_err = devm_gpiod_get_index(dev2, "test4", 1, flags);
ut_asserteq(-EBUSY, PTR_ERR(desc_err));
desc_err = devm_gpiod_get_index_optional(dev2, "test5", 0, flags);
ut_asserteq_ptr(NULL, desc_err);
/*
* Release one GPIO and check that we can get it back using
* 'another-test' and then 'a-test'
*/
devm_gpiod_put(dev, desc2);
desc2 = devm_gpiod_get_index(dev2, "test4", 1, flags);
ut_assert(!IS_ERR(desc2));
devm_gpiod_put(dev2, desc2);
desc2 = devm_gpiod_get_index(dev, "test4", 1, flags);
ut_assert(!IS_ERR(desc2));
/* Release one GPIO before removing the 'a-test' dev. */
devm_gpiod_put(dev, desc2);
device_remove(dev, DM_REMOVE_NORMAL);
/* All the GPIOs must have been freed. We should be able to claim
* them with the 'another-test' device.
*/
desc1 = devm_gpiod_get_index(dev2, "test4", 0, flags);
ut_assert(!IS_ERR(desc1));
desc2 = devm_gpiod_get_index(dev2, "test4", 1, flags);
ut_assert(!IS_ERR(desc2));
desc3 = devm_gpiod_get_index_optional(dev2, "test5", 0, flags);
ut_assert(!IS_ERR(desc3));
ut_assert(desc3);
device_remove(dev2, DM_REMOVE_NORMAL);
return 0;
}
DM_TEST(dm_test_gpio_devm, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);

6
test/dm/test-fdt.c
View File

@ -251,7 +251,7 @@ int dm_check_devices(struct unit_test_state *uts, int num_devices)
/* Test that FDT-based binding works correctly */
static int dm_test_fdt(struct unit_test_state *uts)
{
const int num_devices = 8;
const int num_devices = 9;
struct udevice *dev;
struct uclass *uc;
int ret;
@ -473,12 +473,12 @@ static int dm_test_uclass_foreach(struct unit_test_state *uts)
count = 0;
uclass_id_foreach_dev(UCLASS_TEST_FDT, dev, uc)
count++;
ut_asserteq(8, count);
ut_asserteq(9, count);
count = 0;
uclass_foreach_dev(dev, uc)
count++;
ut_asserteq(8, count);
ut_asserteq(9, count);
return 0;
}