arm64: dts: armada-3720-turris-mox: forbid SDR104 on SDIO for FCC purposes

[ Upstream commit 7a2c36b039d2343cc29fec6102da839477b8dc60 ]

Use sdhci-caps-mask to forbid SDR104 mode on the SDIO capable SDHCI
controller. Without this the device cannot pass electromagnetic
interference certifications.

Fixes: 7109d817db2e ("arm64: dts: marvell: add DTS for Turris Mox")
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
index 5f350cc71a2fdb08e1e7c589ef8d51267b82576f..01f66056d7d51617ed07e90a7cf6c06e51e19d02 100644 (file)
--- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
@@ -171,6 +171,8 @@
        marvell,pad-type = "sd";
        vqmmc-supply = <&vsdio_reg>;
        mmc-pwrseq = <&sdhci1_pwrseq>;
+       /* forbid SDR104 for FCC purposes */
+       sdhci-caps-mask = <0x2 0x0>;
        status = "okay";
 };