From 9f103b9cb5f8de4f196b5ef8f6ddb4749cd732ba Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sat, 27 May 2017 11:37:17 -0600 Subject: dm: blk: Add a way to obtain a block device from its parent Many devices support a child block device (e.g. MMC, USB). Add a convenient way to get this device given the parent device. Signed-off-by: Simon Glass Reviewed-by: Tom Rini --- test/dm/blk.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'test/dm') diff --git a/test/dm/blk.c b/test/dm/blk.c index 5c5eb829a0..923e8d95f0 100644 --- a/test/dm/blk.c +++ b/test/dm/blk.c @@ -150,3 +150,21 @@ static int dm_test_blk_devnum(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_blk_devnum, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + +/* Test that we can get a block from its parent */ +static int dm_test_blk_get_from_parent(struct unit_test_state *uts) +{ + struct udevice *dev, *blk; + + ut_assertok(uclass_get_device(UCLASS_MMC, 0, &dev)); + ut_assertok(blk_get_from_parent(dev, &blk)); + + ut_assertok(uclass_get_device(UCLASS_I2C, 0, &dev)); + ut_asserteq(-ENOTBLK, blk_get_from_parent(dev, &blk)); + + ut_assertok(uclass_get_device(UCLASS_GPIO, 0, &dev)); + ut_asserteq(-ENODEV, blk_get_from_parent(dev, &blk)); + + return 0; +} +DM_TEST(dm_test_blk_get_from_parent, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); -- cgit v1.2.1