dm: core: Add a flag to control sequence numbering

At present we try to use the 'reg' property and device tree aliases to give
devices a sequence number. The 'reg' property is often actually a memory
address, so the sequence numbers thus-obtained are not useful. It would be
better if the devices were just sequentially numbered in that case. In fact
neither I2C nor SPI use this feature, so drop it.

Some devices need us to look up an alias to number them within the uclass.
Add a flag to control this, so it is not done unless it is needed.

Adjust the tests to test this new behaviour.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

3 files changed, 23 insertions, 5 deletions

diff --git a/test/dm/bus.c b/test/dm/bus.c
index e18a6f72499..972c4497908 100644
--- a/test/dm/bus.c
+++ b/test/dm/bus.c
@@ -88,12 +88,13 @@ U_BOOT_DRIVER(testbus_drv) = {
 UCLASS_DRIVER(testbus) = {
 	.name		= "testbus",
 	.id		= UCLASS_TEST_BUS,
+	.flags		= DM_UC_FLAG_SEQ_ALIAS,
 };
 
 /* Test that we can probe for children */
 static int dm_test_bus_children(struct dm_test_state *dms)
 {
-	int num_devices = 4;
+	int num_devices = 6;
 	struct udevice *bus;
 	struct uclass *uc;
 
diff --git a/test/dm/test-fdt.c b/test/dm/test-fdt.c
index dc4ebf9adaf..dfcb3af61bb 100644
--- a/test/dm/test-fdt.c
+++ b/test/dm/test-fdt.c
@@ -89,6 +89,7 @@ int testfdt_ping(struct udevice *dev, int pingval, int *pingret)
 UCLASS_DRIVER(testfdt) = {
 	.name		= "testfdt",
 	.id		= UCLASS_TEST_FDT,
+	.flags		= DM_UC_FLAG_SEQ_ALIAS,
 };
 
 int dm_check_devices(struct dm_test_state *dms, int num_devices)
@@ -128,7 +129,7 @@ int dm_check_devices(struct dm_test_state *dms, int num_devices)
 /* Test that FDT-based binding works correctly */
 static int dm_test_fdt(struct dm_test_state *dms)
 {
-	const int num_devices = 4;
+	const int num_devices = 6;
 	struct udevice *dev;
 	struct uclass *uc;
 	int ret;
@@ -184,7 +185,7 @@ static int dm_test_fdt_uclass_seq(struct dm_test_state *dms)
 	ut_assertok(uclass_find_device_by_seq(UCLASS_TEST_FDT, 3, true, &dev));
 	ut_asserteq_str("b-test", dev->name);
 
-	ut_assertok(uclass_find_device_by_seq(UCLASS_TEST_FDT, 0, true, &dev));
+	ut_assertok(uclass_find_device_by_seq(UCLASS_TEST_FDT, 8, true, &dev));
 	ut_asserteq_str("a-test", dev->name);
 
 	ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_TEST_FDT, 5,
@@ -220,11 +221,11 @@ static int dm_test_fdt_uclass_seq(struct dm_test_state *dms)
 	ut_asserteq(-ENODEV, uclass_get_device_by_seq(UCLASS_TEST_FDT, 1,
 						      &dev));
 	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
-	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 1, &dev));
+	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 4, &dev));
 
 	/* But now that it is probed, we can find it */
 	ut_assertok(uclass_get_device_by_seq(UCLASS_TEST_FDT, 1, &dev));
-	ut_asserteq_str("a-test", dev->name);
+	ut_asserteq_str("f-test", dev->name);
 
 	return 0;
 }
diff --git a/test/dm/test.dts b/test/dm/test.dts
index 33f2c00747d..84024a44a3f 100644
--- a/test/dm/test.dts
+++ b/test/dm/test.dts
@@ -8,7 +8,15 @@
 
 	aliases {
 		console = &uart0;
+		i2c0 = "/i2c@0";
+		spi0 = "/spi@0";
 		testfdt6 = "/e-test";
+		testbus3 = "/some-bus";
+		testfdt0 = "/some-bus/c-test@0";
+		testfdt1 = "/some-bus/c-test@1";
+		testfdt3 = "/b-test";
+		testfdt5 = "/some-bus/c-test@5";
+		testfdt8 = "/a-test";
 	};
 
 	uart0: serial {
@@ -86,6 +94,14 @@
 		compatible = "google,another-fdt-test";
 	};
 
+	f-test {
+		compatible = "denx,u-boot-fdt-test";
+	};
+
+	g-test {
+		compatible = "denx,u-boot-fdt-test";
+	};
+
 	gpio_a: base-gpios {
 		compatible = "sandbox,gpio";
 		gpio-controller;