mainboard/google/kahlee: Add tis_plat_irq_status

For variants that have a cr50 tpm, this enables faster polling when
interacting with the tpm.

BUG=b:72838769
BRANCH=none
TEST=verified on grunt that irq is used and not timeouts for tpm

Change-Id: I5786d334b6c1cc70f4c7107c75b07a7e27ac4428
Signed-off-by: Chris Ching <chingcodes@chromium.org>
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/23626
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/mainboard/google/kahlee/variants/baseboard/tpm_tis.c b/src/mainboard/google/kahlee/variants/baseboard/tpm_tis.c
new file mode 100644
index 000000000000..fe5e42c4ad84
--- /dev/null
+++ b/src/mainboard/google/kahlee/variants/baseboard/tpm_tis.c
@@ -0,0 +1,23 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google Inc.
+ *
+ * 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 <security/tpm/tis.h>
+#include <soc/gpio.h>
+#include <variant/gpio.h>
+
+int tis_plat_irq_status(void)
+{
+	return gpio_interrupt_status(H1_PCH_INT);
+}