gpio: search for gpio label if gpio is not found through bank name

dm_gpio_lookup_name() searches for a gpio through
the bank name. But we have also gpio labels, and it
makes sense to search for a gpio also in the labels
we have defined, if no gpio is found through the
bank name definition.

This is useful for example if you have a wp pin on
different gpios on different board versions.

If dm_gpio_lookup_name() searches also for the gpio labels,
you can give the gpio an unique label name and search
for this label, and do not need to differ between
board revisions.

Signed-off-by: Heiko Schocher <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
[trini: Don't enable by default]
Signed-off-by: Tom Rini <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/test/dm/gpio.c b/test/dm/gpio.c
index ecba5669838..fcee1fe5983 100644
--- a/test/dm/gpio.c
+++ b/test/dm/gpio.c
@@ -132,6 +132,15 @@ static int dm_test_gpio(struct unit_test_state *uts)
 	ut_assertok(dm_gpio_set_value(desc, 0));
 	ut_asserteq(0, dm_gpio_get_value(desc));
 
+	/* Check if lookup for labels work */
+	ut_assertok(gpio_lookup_name("hog_input_active_low", &dev, &offset,
+				     &gpio));
+	ut_asserteq_str(dev->name, "base-gpios");
+	ut_asserteq(0, offset);
+	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 0, gpio);
+	ut_assert(gpio_lookup_name("hog_not_exist", &dev, &offset,
+				   &gpio));
+
 	return 0;
 }
 DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);