hatch: Fix FPMCU pwr/rst gpio handling for dratini/jinlon

In https://review.coreboot.org/c/coreboot/+/37459
(commit fcd8c9e99e7f70e2b9494f2fa28a08ba13126daa) which moves power/reset
pin control of FPMCU to var/board/ramstage, but does not implement it for
dratini/jinlon. So, add it in dratini/jinlon.

BUG=b:146366921
TEST=emerge-hatch coreboot

Change-Id: I1b6dbe4ba0a1242aa64346410beed4152b4f457f
Signed-off-by: Wisley Chen <wisley.chen@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37833
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/mainboard/google/hatch/variants/jinlon/ramstage.c b/src/mainboard/google/hatch/variants/jinlon/ramstage.c
new file mode 100644
index 0000000000..9b919fccd8
--- /dev/null
+++ b/src/mainboard/google/hatch/variants/jinlon/ramstage.c
@@ -0,0 +1,32 @@
+/*
+ * 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.
+ */
+
+#include <delay.h>
+#include <gpio.h>
+#include <baseboard/variants.h>
+#include <soc/gpio.h>
+
+void variant_ramstage_init(void)
+{
+	/*
+	 * Enable power to FPMCU, wait for power rail to stabilize,
+	 * and then deassert FPMCU reset.
+	 * Waiting for the power rail to stabilize can take a while,
+	 * a minimum of 400us on Kohaku.
+	 */
+	gpio_output(GPP_C11, 1);
+	mdelay(1);
+	gpio_output(GPP_A12, 1);
+}