Hi Stephen,
On 1 December 2014 at 11:26, Stephen Warren swar...@wwwdotorg.org wrote:
On 11/26/2014 01:46 PM, Simon Glass wrote:
From: Allen Martin amar...@nvidia.com
Nyan-big is a Tegra124 clamshell board that is very similar to venice2,
but
it has a different panel, the sdcard cd and wp sense are flipped, and it
has
a different revision of the AS3722 PMIC.
This is the Acer Chromebook 13 CB5-311-T7NN (13.3-inch HD, NVIDIA
Tegra K1, 2GB). The display is not currently supported, so it should
boot on other nyan-based Chromebooks also, but only the device tree for
nyan-big is provided here.
The device tree file is from Linux but with features removed which are
unlikely to be supported in U-Boot soon (regulators, pinmux). Also the
addresses are updated to 32-bit.
At a quick glance, the naming seems fine here, so I'm OK with the patch.
I'd like to see tegra-pinmux-scripts updated to suport this board, but don't
hold up this patch for that; just a nice to have when it can happen. Perhaps
Allen can also double-check that the pinmux data in this patch exactly
matches the NVIDIA syseng spreadsheet for this board.
I did send a patch to linux-tegra - sorry I may have forgotten to copy
anyone. I'll take another look.
I'd like Allen to explicitly comment on the reset GPIO difference and why it
occurred. I'd like to see that happen before the patch is merged, so the
pinmux data can be correct. Perhaps it's simply due to:
diff --git a/board/nvidia/nyan-big/nyan-big.c
b/board/nvidia/nyan-big/nyan-big.c
+void pinmux_init(void)
+{
+ pinmux_set_tristate_input_clamping();
Apparently, we should explicitly not be doing that, even though I was
earlier told by our syseng team we explicitly should be doing that. Removing
that call (or explicitly reverting it) might make the difference go away?
OK I will try taking it out and see what happens.
Regards,
Simon
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