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[v2] ARM: tegra: ouya: Fix eMMC on specific bootloaders

Message ID 20210107164313.1339428-1-pgwipeout@gmail.com
State Changes Requested
Headers show
Series [v2] ARM: tegra: ouya: Fix eMMC on specific bootloaders | expand

Commit Message

Peter Geis Jan. 7, 2021, 4:43 p.m. UTC
Ouya fails to detect the eMMC module when booted via certain bootloaders.
Fastboot and hard-kexec bootloaders fail while u-boot does not. It was
discovered that the issue manifests if the sdmmc4 alternate configuration
clock pin is input disabled.

Ouya uses sdmmc4 in the primary pin configuration. It is unknown why this
occurs, though it is likely related to other eMMC limitations experienced
on Ouya.

For now, fix it by enabling input on cam_mclk_pcc0.

Cc: stable@vger.kernel.org # 5.10+
Fixes: d7195ac5c9c5 ("ARM: tegra: Add device-tree for Ouya")
Reported-by: Matt Merhar <mattmerhar@protonmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
---
Changes v2:
-Added stable tag.
-Improved commit message.

 arch/arm/boot/dts/tegra30-ouya.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/arch/arm/boot/dts/tegra30-ouya.dts b/arch/arm/boot/dts/tegra30-ouya.dts
index 74da1360d297..0368b3b816ef 100644
--- a/arch/arm/boot/dts/tegra30-ouya.dts
+++ b/arch/arm/boot/dts/tegra30-ouya.dts
@@ -4352,8 +4352,8 @@  cam_mclk_pcc0 {
 		nvidia,pins = "cam_mclk_pcc0";
 		nvidia,function = "vi_alt3";
 		nvidia,pull = <TEGRA_PIN_PULL_NONE>;
-		nvidia,tristate = <TEGRA_PIN_ENABLE>;
-		nvidia,enable-input = <TEGRA_PIN_DISABLE>;
+		nvidia,tristate = <TEGRA_PIN_DISABLE>;
+		nvidia,enable-input = <TEGRA_PIN_ENABLE>;
 	};
 	pcc1 {
 		nvidia,pins = "pcc1";