From 1ca7e2062b4e8c3b211753dcb19c063b5b9b73ca Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Wed, 23 Jul 2014 06:55:18 -0600 Subject: dm: Provide a function to scan child FDT nodes At present only root nodes in the device tree are scanned for devices. But some devices can have children. For example a SPI bus may have several children for each of its chip selects. Add a function which scans subnodes and binds devices for each one. This can be used for the root node scan also, so change it. A device can call this function in its bind() or probe() methods to bind its children. Signed-off-by: Simon Glass --- test/dm/bus.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 test/dm/bus.c (limited to 'test/dm/bus.c') diff --git a/test/dm/bus.c b/test/dm/bus.c new file mode 100644 index 0000000..cfb9934 --- /dev/null +++ b/test/dm/bus.c @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +static int testbus_drv_probe(struct udevice *dev) +{ + return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false); +} + +static const struct udevice_id testbus_ids[] = { + { + .compatible = "denx,u-boot-test-bus", + .data = DM_TEST_TYPE_FIRST }, + { } +}; + +U_BOOT_DRIVER(testbus_drv) = { + .name = "testbus_drv", + .of_match = testbus_ids, + .id = UCLASS_TEST_BUS, + .probe = testbus_drv_probe, + .priv_auto_alloc_size = sizeof(struct dm_test_priv), + .platdata_auto_alloc_size = sizeof(struct dm_test_pdata), +}; + +UCLASS_DRIVER(testbus) = { + .name = "testbus", + .id = UCLASS_TEST_BUS, +}; + +/* Test that we can probe for children */ +static int dm_test_bus_children(struct dm_test_state *dms) +{ + int num_devices = 4; + struct udevice *bus; + struct uclass *uc; + + ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc)); + ut_asserteq(num_devices, list_count_items(&uc->dev_head)); + + /* Probe the bus, which should yield 3 more devices */ + ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus)); + num_devices += 3; + + ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc)); + ut_asserteq(num_devices, list_count_items(&uc->dev_head)); + + ut_assert(!dm_check_devices(dms, num_devices)); + + return 0; +} +DM_TEST(dm_test_bus_children, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); -- cgit v1.1