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Tegra124 has been randomly hanging during system suspend when entering the Tegra LP1 low power state. The hang is caused by the Tegra SDHCI driver and linked to the UHS-I tuning sequence. Disabling the UHS-I modes for Tegra124 prevents any hangs from occurring when entering system suspend. Unfortunately, the tuning sequence described in the public Tegra documentation is incomplete and on inspection of the current tuning sequence that has been implemented is also incomplete and may cause problems. In the short-term it is safer to disable UHS-I modes for now and fix later because it would be too large of a change to simply patch now. Therefore, disable UHS-I modes for Tegra124. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
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