Skip to content
Commit effe89e4 authored by Tony Lindgren's avatar Tony Lindgren
Browse files

soc: ti: omap-prm: Fix occasional abort on reset deassert for dra7 iva



On reset deassert, we must wait a bit after the rstst bit change before
we allow clockdomain autoidle again. Otherwise we get the following oops
sometimes on dra7 with iva:

Unhandled fault: imprecise external abort (0x1406) at 0x00000000
44000000.ocp:L3 Standard Error: MASTER MPU TARGET IVA_CONFIG (Read Link):
At Address: 0x0005A410 : Data Access in User mode during Functional access
Internal error: : 1406 [#1] SMP ARM
...
(sysc_write_sysconfig) from [<c0782cb0>] (sysc_enable_module+0xcc/0x260)
(sysc_enable_module) from [<c0782f0c>] (sysc_runtime_resume+0xc8/0x174)
(sysc_runtime_resume) from [<c0a3e1ac>] (genpd_runtime_resume+0x94/0x224)
(genpd_runtime_resume) from [<c0a33f0c>] (__rpm_callback+0xd8/0x180)

It is unclear what all devices this might affect, but presumably other
devices with the rstst bit too can be affected. So let's just enable the
delay for all the devices with rstst bit for now. Later on we may want to
limit the list to the know affected devices if needed.

Fixes: d30cd83f ("soc: ti: omap-prm: add support for denying idle for reset clockdomain")
Reported-by: default avatarYongqin Liu <yongqin.liu@linaro.org>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent a7b5d7c4
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment