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https://github.com/AsahiLinux/u-boot
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1ca7e2062b
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 <sjg@chromium.org>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* Copyright (c) 2014 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <dm/root.h>
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#include <dm/test.h>
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#include <dm/ut.h>
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#include <dm/util.h>
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DECLARE_GLOBAL_DATA_PTR;
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static int testbus_drv_probe(struct udevice *dev)
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{
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return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
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}
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static const struct udevice_id testbus_ids[] = {
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{
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.compatible = "denx,u-boot-test-bus",
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.data = DM_TEST_TYPE_FIRST },
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{ }
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};
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U_BOOT_DRIVER(testbus_drv) = {
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.name = "testbus_drv",
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.of_match = testbus_ids,
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.id = UCLASS_TEST_BUS,
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.probe = testbus_drv_probe,
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.priv_auto_alloc_size = sizeof(struct dm_test_priv),
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.platdata_auto_alloc_size = sizeof(struct dm_test_pdata),
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};
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UCLASS_DRIVER(testbus) = {
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.name = "testbus",
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.id = UCLASS_TEST_BUS,
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};
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/* Test that we can probe for children */
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static int dm_test_bus_children(struct dm_test_state *dms)
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{
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int num_devices = 4;
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struct udevice *bus;
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struct uclass *uc;
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ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
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ut_asserteq(num_devices, list_count_items(&uc->dev_head));
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/* Probe the bus, which should yield 3 more devices */
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ut_assertok(uclass_get_device(UCLASS_TEST_BUS, 0, &bus));
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num_devices += 3;
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ut_assertok(uclass_get(UCLASS_TEST_FDT, &uc));
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ut_asserteq(num_devices, list_count_items(&uc->dev_head));
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ut_assert(!dm_check_devices(dms, num_devices));
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return 0;
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}
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DM_TEST(dm_test_bus_children, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
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