Sometimes enumeration fails (about 1 in 50 times on my custom board).
The underlying reason is probably electrical but Linux does not have the problem.
Comparing the Linux / u-boot implementations shows that Linux retries the error case whereas u-boot aborts early.
Removing the early abort in u-boot fixes the problem.
Signed-off-by: Martin Fuzzey martin.fuzzey@flowbird.group --- drivers/w1/w1-uclass.c | 4 ---- 1 file changed, 4 deletions(-)
diff --git a/drivers/w1/w1-uclass.c b/drivers/w1/w1-uclass.c index 5544b19..ad86bf6 100644 --- a/drivers/w1/w1-uclass.c +++ b/drivers/w1/w1-uclass.c @@ -84,10 +84,6 @@ static int w1_enumerate(struct udevice *bus) rn |= (tmp64 << i); }
- /* last device or error, aborting here */ - if ((triplet_ret & 0x03) == 0x03) - last_device = true; - if ((triplet_ret & 0x03) != 0x03) { if (desc_bit == last_zero || last_zero < 0) { last_device = 1;