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Commit 59ac5bfa authored by Sowjanya Komatineni's avatar Sowjanya Komatineni Committed by Greg Kroah-Hartman
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sdhci: tegra: Add missing TMCLK for data timeout



commit 8048822bac01936fda2c7b924a52131da81e6198 upstream.

commit b5a84ecf ("mmc: tegra: Add Tegra210 support")

Tegra210 and later has a separate sdmmc_legacy_tm (TMCLK) used by Tegra
SDMMC hawdware for data timeout to achive better timeout than using
SDCLK and using TMCLK is recommended.

USE_TMCLK_FOR_DATA_TIMEOUT bit in Tegra SDMMC register
SDHCI_TEGRA_VENDOR_SYS_SW_CTRL can be used to choose either TMCLK or
SDCLK for data timeout.

Default USE_TMCLK_FOR_DATA_TIMEOUT bit is set to 1 and TMCLK is used
for data timeout by Tegra SDMMC hardware and having TMCLK not enabled
is not recommended.

So, this patch adds quirk NVQUIRK_HAS_TMCLK for SoC having separate
timeout clock and keeps TMCLK enabled all the time.

Fixes: b5a84ecf ("mmc: tegra: Add Tegra210 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: default avatarJon Hunter <jonathanh@nvidia.com>
Reviewed-by: default avatarJon Hunter <jonathanh@nvidia.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarSowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-8-git-send-email-skomatineni@nvidia.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e915b3b6
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