Reset on Beaglebone Black has become unreliable/broken

[Konstantin Kletschke]

On Tue, Dec 03, 2024 at 07:46:56PM +0100, Ahmad Fatoum wrote:

> Anther thing, I wonder about is what configuration the PMIC has on affected
> boards and boards not affected. Can you use the I2C commands in barebox
> to read the PMIC register set and compare it between the affected and
> unaffected boards? Maybe they have different mask defaults?

This is an affected Board (warm restart freezing):

barebox at TI AM335x BeagleBone black:/ i2c_read -b0 -a 0x24 -r 0 -c 0x1e
0xe2 0x3e 0x01 0x01 0xb1 0x80 0xb2 0x01 0x00 0x00 0x04 0x00 0x7f 0x0c 0x18 0x08 0x08 0x06 0x09 0x38 0x26 0x3f 0x7f 0x00 0x03 0x15 0x5f 0x32 0x40 0x20
barebox at TI AM335x BeagleBone black:/ i2c_read -b0 -a 0x24 -r 0 -c 0x1e
0xe2 0x3e 0x00 0x01 0xb1 0x80 0xb2 0x01 0x00 0x00 0x04 0x00 0x7f 0x0c 0x18 0x08 0x08 0x06 0x09 0x38 0x26 0x3f 0x7f 0x00 0x03 0x15 0x5f 0x32 0x40 0x20



This is an unaffected Board (warm restart works):

barebox at TI AM335x BeagleBone black:/ i2c_read -b0 -a 0x24 -r 0 -c 0x1e
0xe2 0x3e 0x01 0x01 0xb1 0x80 0xb2 0x01 0x00 0x00 0x04 0x00 0x7f 0x0c 0x18 0x08 0x08 0x06 0x09 0x38 0x26 0x3f 0x7f 0x00 0x03 0x15 0x5f 0x32 0x40 0x20
barebox at TI AM335x BeagleBone black:/ i2c_read -b0 -a 0x24 -r 0 -c 0x1e
0xe2 0x3e 0x00 0x01 0xb1 0x80 0xb2 0x01 0x00 0x00 0x04 0x00 0x7f 0x0c 0x18 0x08 0x08 0x06 0x09 0x38 0x26 0x3f 0x7f 0x00 0x03 0x15 0x5f 0x32 0x40 0x20





I spot no difference, and both change INT from 1 to 0 on second read.

Kind Regards
Konstantin


-- 
INSIDE M2M GmbH
Konstantin Kletschke
Berenbosteler Straße 76 B
30823 Garbsen

Telefon: +49 (0) 5137 90950136
Mobil: +49 (0) 151 15256238
Fax: +49 (0) 5137 9095010

konstantin.kletschke at inside-m2m.de
http://www.inside-m2m.de 

Geschäftsführung: Michael Emmert, Derek Uhlig
HRB: 111204, AG Hannover