[PATCH v5 0/7] Fix timeout clock used by hardware data timeout

From: Sowjanya Komatineni
Date: Wed Aug 26 2020 - 16:05:47 EST


Tegra210/Tegra186/Tegra194 has incorrectly enabled
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK from the beginning of their support.

Tegra210 and later SDMMC hardware default uses sdmmc_legacy_tm (TMCLK)
all the time for hardware data timeout instead of SDCLK and this TMCLK
need to be kept enabled by Tegra sdmmc driver.

This series includes patches to fix this for Tegra210/Tegra186/Tegra194.

These patches need to be manually backported for 4.9, 4.14 and 4.19.

Will send patches to backport separately once these patches are ack'd.

Delta between patch versions:
[v5]: Include below changes based on v4 feedback
- updated dt-binding doc to be more clear
- updated Tegra sdhci driver to retrieve sdhci and tmclk clocks
based on no. of clocks in sdhci device node as old device trees
do not use sdhci clock name and this allows proper clock retrival
irrespective of sdhci and tmclk clocks order in device tree.
- Added separate quirk for identifying SoC's supporting separate
timeout clock to be more clear.

[v4]: Include additional dt-binding patch

[v3]: Same as v2 with fixes tag

[v2]: Includes minor fix
- Patch-0006: parentheses around operand of '!'

Sowjanya Komatineni (7):
sdhci: tegra: Remove SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK for Tegra210
sdhci: tegra: Remove SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK for Tegra186
dt-bindings: mmc: tegra: Add tmclk for Tegra210 and later
arm64: tegra: Add missing timeout clock to Tegra210 SDMMC
arm64: tegra: Add missing timeout clock to Tegra186 SDMMC nodes
arm64: tegra: Add missing timeout clock to Tegra194 SDMMC nodes
sdhci: tegra: Add missing TMCLK for data timeout

.../bindings/mmc/nvidia,tegra20-sdhci.txt | 32 +++++++-
arch/arm64/boot/dts/nvidia/tegra186.dtsi | 20 +++--
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 15 ++--
arch/arm64/boot/dts/nvidia/tegra210.dtsi | 20 +++--
drivers/mmc/host/sdhci-tegra.c | 91 +++++++++++++++++++---
5 files changed, 143 insertions(+), 35 deletions(-)

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2.7.4