On 05/19/2016 08:31 AM, Jon Hunter wrote:

On 29/02/16 21:01, Lucas Stach wrote:

quoted

This allows to switch the card signal voltage level to 1.8V,
which is needed for any ultra high speed modes to work.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
---
This needs the SDMMC memcomp pad calibration patches I just
sent out to be applied, otherwise the card voltage change will
fail with a message in the kernel log and a fall back to
high speed operation.
---
  arch/arm/boot/dts/tegra30-beaver.dts | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/tegra30-beaver.dts b/arch/arm/boot/dts/tegra30-beaver.dts
index 1daed40..6b237f2 100644
--- a/arch/arm/boot/dts/tegra30-beaver.dts
+++ b/arch/arm/boot/dts/tegra30-beaver.dts

@@ -1848,7 +1848,7 @@

  				ldo5_reg: ldo5 {
  					regulator-name = "vddio_sdmmc,avdd_vdac";

Stephen, looking at the schematics, I don't see that this is connected
to the avdd_vdac (which appears to be unconnected) and so I am wondering
if this name should be just "vddio_sdmmc"?

Yes, I don't know where avdd_vdac came from; it doesn't appear connected 
on any Beaver (or even Cardhu, from which it was probably derived) 
schematic that I have.

CC += Bryan in case he has any recollection since he wrote this DT.