Commit graph

5 commits

Author SHA1 Message Date
Simon Glass
f7ae49fc4f common: Drop log.h from common header
Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 21:19:18 -04:00
Martin Fuzzey
b95938117c w1: fix occasional enumeration failure
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>
2018-12-06 17:15:15 -05:00
Martin Fuzzey
65b60897a7 w1: fix data abort if no one wire bus master present
When the "w1 bus" command is used with no bus master present
a data abort may occur.

This is because uclass_first_device() returns zero, but sets the output
struct udevice pointer to NULL in the no device found case.

Fix w1_get_bus() to account for this and return an error code
as is expected by the callers.

Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Reviewed-by: Eugen Hristev <eugen.hristev@microchip.com>
2018-11-01 10:02:10 -04:00
Eugen Hristev
543b98c857 w1: identify devices with w1-eeprom uclass
When a new device is discovered, this may be a w1 eeprom device.
Attempt to find the proper node and driver from the w1-eeprom subsystem.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2018-09-28 20:22:35 -04:00
Maxime Ripard
d3e19cf919 w1: Add 1-Wire uclass
We might want to use 1-Wire devices connected on boards such as EEPROMs in
U-Boot.

Provide a framework to be able to do that.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
[eugen.hristev@microchip.com: reworked]
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2018-09-28 20:22:34 -04:00