This allows to test if a pin's label if displayed using gpio_get_status() when this pin is configured in alternate function.
Signed-off-by: Patrice Chotard patrice.chotard@foss.st.com Reviewed-by: Simon Glass sjg@chromium.org
---
(no changes since v1)
drivers/gpio/sandbox.c | 5 +++++ include/asm-generic/gpio.h | 1 + include/dt-bindings/gpio/sandbox-gpio.h | 3 +++ test/dm/gpio.c | 30 +++++++++++++++++++++++++ 4 files changed, 39 insertions(+)
diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c index 106b2a7b27..305f9a6ff6 100644 --- a/drivers/gpio/sandbox.c +++ b/drivers/gpio/sandbox.c @@ -196,6 +196,8 @@ static int sb_gpio_get_function(struct udevice *dev, unsigned offset) return GPIOF_OUTPUT; if (get_gpio_flag(dev, offset, GPIOD_IS_IN)) return GPIOF_INPUT; + if (get_gpio_flag(dev, offset, GPIOD_IS_AF)) + return GPIOF_FUNC;
return GPIOF_INPUT; /*GPIO is not configurated */ } @@ -219,6 +221,9 @@ static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, if (args->args[1] & GPIO_OUT_ACTIVE) desc->flags |= GPIOD_IS_OUT_ACTIVE;
+ if (args->args[1] & GPIO_AF) + desc->flags |= GPIOD_IS_AF; + return 0; }
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 81f63f06f1..0fcf70983f 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -127,6 +127,7 @@ struct gpio_desc { #define GPIOD_OPEN_SOURCE BIT(6) /* GPIO is open source type */ #define GPIOD_PULL_UP BIT(7) /* GPIO has pull-up enabled */ #define GPIOD_PULL_DOWN BIT(8) /* GPIO has pull-down enabled */ +#define GPIOD_IS_AF BIT(9) /* GPIO is an alternate function */
/* Flags for updating the above */ #define GPIOD_MASK_DIR (GPIOD_IS_OUT | GPIOD_IS_IN | \ diff --git a/include/dt-bindings/gpio/sandbox-gpio.h b/include/dt-bindings/gpio/sandbox-gpio.h index e4bfdb3ce1..05f9836583 100644 --- a/include/dt-bindings/gpio/sandbox-gpio.h +++ b/include/dt-bindings/gpio/sandbox-gpio.h @@ -21,4 +21,7 @@ /* Bit 18 express GPIO output is active */ #define GPIO_OUT_ACTIVE 0x40000
+/* Bit 19 express GPIO set as alternate function */ +#define GPIO_AF 0x80000 + #endif diff --git a/test/dm/gpio.c b/test/dm/gpio.c index 33ae98701f..a8c35d4370 100644 --- a/test/dm/gpio.c +++ b/test/dm/gpio.c @@ -778,3 +778,33 @@ static int dm_test_gpio_get_values_as_int_base3(struct unit_test_state *uts) } DM_TEST(dm_test_gpio_get_values_as_int_base3, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT); + +/* Check that gpio_get_status return the label of a GPIO configured as GPIOD_AF */ +static int dm_test_gpio_function(struct unit_test_state *uts) +{ + struct gpio_desc desc; + struct udevice *dev; + ulong flags; + unsigned int offset, gpio; + char buf[80]; + + ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev)); + ut_asserteq_str("a-test", dev->name); + + /* request gpio_b 5 */ + ut_assertok(gpio_request_by_name(dev, "test-gpios", 2, &desc, 0)); + /* update gpio_b 5 function to GPIO_AF */ + ut_assertok(dm_gpio_clrset_flags(&desc, GPIOD_IS_AF, GPIOD_IS_AF)); + ut_assertok(dm_gpio_get_flags(&desc, &flags)); + ut_asserteq(GPIOD_IS_AF, flags); + /* check using gpio_get_status that label is displayed for a pin with GPIO_AF function */ + ut_assertok(gpio_lookup_name("b5", &dev, &offset, &gpio)); + ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf))); + ut_asserteq_str("b5: func a-test.test-gpios2", buf); + + ut_assertok(dm_gpio_free(dev, &desc)); + + return 0; +} +DM_TEST(dm_test_gpio_function, + UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);