From 79b08ae7c411840ea5a9fba349025d217e700576 Mon Sep 17 00:00:00 2001 From: Aswath Govindraju Date: Sat, 29 May 2021 09:07:49 +0530 Subject: arm64: dts: ti: k3-am65: Add support for UHS-I modes in MMCSD1 subsystem UHS-I speed modes are supported in AM65 S.R. 2.0 SoC[1]. Add support by removing the no-1-8-v tag and including the voltage regulator device tree nodes for power cycling. However, the 4 bit interface of AM65 SR 1.0 cannot be supported at 3.3 V or 1.8 V because of erratas i2025 and i2026 [2]. As the SD card is the primary boot mode for development usecases, continue to enable SD card and disable UHS-I modes in it to minimize any ageing issues happening because of erratas. k3-am6528-iot2050-basic and k3-am6548-iot2050-advanced boards use S.R. 1.0 version of AM65 SoC. Therefore, add no-1-8-v in sdhci1 device tree node of the common iot2050 device tree file. [1] - https://www.ti.com/lit/ug/spruid7e/spruid7e.pdf, section 12.3.6.1.1 [2] - https://www.ti.com/lit/er/sprz452e/sprz452e.pdf Signed-off-by: Aswath Govindraju Acked-by: Jan Kiszka Signed-off-by: Nishanth Menon Link: https://lore.kernel.org/r/20210529033749.6250-1-a-govindraju@ti.com --- arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/arm64/boot/dts/ti/k3-am65-main.dtsi') diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi index 6cd3131eb9ff..f97fc00c00ca 100644 --- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi @@ -301,7 +301,6 @@ ti,otap-del-sel = <0x2>; ti,trm-icp = <0x8>; dma-coherent; - no-1-8-v; }; scm_conf: scm-conf@100000 { -- cgit