]> www.infradead.org Git - users/jedix/linux-maple.git/commit
mmc: tegra: prevent HS200 on Tegra 3
authorStefan Agner <stefan@agner.ch>
Thu, 12 Jul 2018 07:39:02 +0000 (09:39 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 26 Sep 2018 06:38:11 +0000 (08:38 +0200)
commit26bea7e6d2cabf0e3a71f577640dbd78b2715ac7
tree942d06e454130ffc2e437e8048784bd953cedc6e
parent58d402738d9fd6f9fbb779dd8e44be803f2f6cb1
mmc: tegra: prevent HS200 on Tegra 3

[ Upstream commit 127407e36f4fe3a1d5e8b9998b479956ce83a7dc ]

The stack assumes that SDHC controller which support SD3.0 (SDR104) do
support HS200. This is not the case for Tegra 3, which does support SD
3.0
but only supports eMMC spec 4.41.

Use SDHCI_QUIRK2_BROKEN_HS200 to indicate that the controller does not
support HS200.

Note that commit 156e14b126ff ("mmc: sdhci: fix caps2 for HS200") added
the tie between SD3.0 (SDR104) and HS200. I don't think that this is
necessarly true. It is fully legitimate to support SD3.0 and not support
HS200. The quirk naming suggests something is broken in the controller,
but this is not the case: The controller simply does not support HS200.

Fixes: 7ad2ed1dfcbe ("mmc: tegra: enable UHS-I modes")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/host/sdhci-tegra.c