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soc: qcom-geni-se: Add interconnect support to fix earlycon crash

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QUP core clock is shared among all the SE drivers present on particular
QUP wrapper, the system will reset(unclocked access) if earlycon used after
QUP core clock is put to 0 from other SE drivers before real console comes
up.

As earlycon can't vote for it's QUP core need, to fix this add ICC
support to common/QUP wrapper driver and put vote for QUP core from
probe on behalf of earlycon and remove vote during earlycon exit call.

Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Reported-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/1592908737-7068-3-git-send-email-akashast@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Akash Asthana
2020-06-23 16:08:51 +05:30
committed by Bjorn Andersson
parent 58ffbba6a3
commit 048eb908a1
3 changed files with 77 additions and 0 deletions
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2
include/linux/qcom-geni-se.h
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@@ -454,5 +454,7 @@ int geni_icc_set_bw(struct geni_se *se);
int geni_icc_enable(struct geni_se *se);
int geni_icc_disable(struct geni_se *se);
void geni_remove_earlycon_icc_vote(void);
#endif
#endif