hatch: Create puff variant

Includes:
 - gpio mappings,
 - overridetree.cb,
 - kconfig adjustments for reading spd over smbus.

V.2: Rework devicetree with comments and drop some useless gpio maps.

BUG=b:141658115
TEST=./util/abuild/abuild -p none -t google/hatch -x -a

Change-Id: I6449c4fcc1df702ed4f0d35afd7b0981e4c72323
Signed-off-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36452
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/mainboard/google/hatch/variants/puff/Makefile.inc b/src/mainboard/google/hatch/variants/puff/Makefile.inc
new file mode 100644
index 0000000000..30daaf7f0c
--- /dev/null
+++ b/src/mainboard/google/hatch/variants/puff/Makefile.inc
@@ -0,0 +1,16 @@
+## This file is part of the coreboot project.
+##
+## Copyright 2019 Google LLC
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+ramstage-y += gpio.c
+bootblock-y += gpio.c