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| author | Oliver O'Halloran <oohall@gmail.com> | 2017-04-12 17:27:26 +1000 |
|---|---|---|
| committer | Michael Neuling <mikey@neuling.org> | 2017-04-13 12:02:21 +1000 |
| commit | bcfa5f2160bcf6b1dd5d037fda831c20294c5f53 (patch) | |
| tree | 7d2397d32f01b840dbd95ffada5ac0f3172f6817 /hw | |
| parent | 044fe827e02734451a1299166d1d020a7d57ff63 (diff) | |
| download | skiboot-bcfa5f2160bcf6b1dd5d037fda831c20294c5f53.zip skiboot-bcfa5f2160bcf6b1dd5d037fda831c20294c5f53.tar.gz skiboot-bcfa5f2160bcf6b1dd5d037fda831c20294c5f53.tar.bz2 | |
hdata/i2c: Workaround broken i2c devices
Some older revisions of hostboot populate the host i2c device fields
with all zero entires. Detect and ignore these so we don't crash on
boot.
Without this we get:
[ 151.251240444,3] DT: dt_attach_root failed, duplicate unknown@0
[ 151.251300274,3] ***********************************************
[ 151.251339330,3] Unexpected exception 200 !
[ 151.251363654,3] SRR0 : 0000000030090c28 SRR1 : 9000000000201000
[ 151.251409207,3] HSRR0: 0000000000000010 HSRR1: 9000000000001000
[ 151.251444114,3] LR : 30034018300c5ab0 CTR : 30034018300a343c
[ 151.251478314,3] CFAR : 0000000030024804
[ 151.251500346,3] CR : 40004208 XER: 00000000
<snip GPRS>
[ 151.252083372,0] Aborting!
CPU 0034 Backtrace:
S: 0000000031cd36a0 R: 000000003001364c .backtrace+0x2c
S: 0000000031cd3730 R: 0000000030018db8 ._abort+0x4c
S: 0000000031cd37b0 R: 0000000030025c6c .exception_entry+0x114
S: 0000000031cd3840 R: 0000000000001f00 * +0x1f00
S: 0000000031cd3a10 R: 0000000031cd3ab0 *
S: 0000000031cd3aa0 R: 00000000300248b8 .new_property+0x90
S: 0000000031cd3b30 R: 0000000030024b50 .__dt_add_property_cells+0x30
S: 0000000031cd3bd0 R: 000000003009abec .parse_i2c_devs+0x350
S: 0000000031cd3cf0 R: 0000000030093ffc .parse_hdat+0x11e4
S: 0000000031cd3e30 R: 00000000300144c8 .main_cpu_entry+0x138
S: 0000000031cd3f00 R: 0000000030002648 boot_entry+0x198
(Modified: removed backtrace() call and added in backtrace to commit)
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Diffstat (limited to 'hw')
0 files changed, 0 insertions, 0 deletions