1 files changed, 60 insertions, 0 deletions
diff --git a/src/mainboard/google/gale/verstage.c b/src/mainboard/google/gale/verstage.c
new file mode 100644
index 0000000000..cdc4386988
--- /dev/null
+++ b/src/mainboard/google/gale/verstage.c
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 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 <delay.h>
+#include <gpio.h>
+#include <soc/verstage.h>
+
+
+#define TPM_RESET_GPIO		19
+
+static void ipq_setup_tpm(void)
+{
+
+#ifdef CONFIG_I2C_TPM
+	gpio_tlmm_config_set(TPM_RESET_GPIO, FUNC_SEL_GPIO,
+			     GPIO_PULL_UP, GPIO_6MA, 1);
+	gpio_set(TPM_RESET_GPIO, 0);
+	udelay(100);
+	gpio_set(TPM_RESET_GPIO, 1);
+
+	/*
+	 * ----- Per the SLB 9615XQ1.2 spec -----
+	 *
+	 * 4.7.1 Reset Timing
+	 *
+	 * The TPM_ACCESS_x.tpmEstablishment bit has the correct value
+	 * and the TPM_ACCESS_x.tpmRegValidSts bit is typically set
+	 * within 8ms after RESET# is deasserted.
+	 *
+	 * The TPM is ready to receive a command after less than 30 ms.
+	 *
+	 * --------------------------------------
+	 *
+	 * I'm assuming this means "wait for 30ms"
+	 *
+	 * If we don't wait here, subsequent QUP I2C accesses
+	 * to the TPM either fail or timeout.
+	 */
+	mdelay(30);
+
+#endif /* CONFIG_I2C_TPM */
+}
+
+void verstage_mainboard_init(void)
+{
+	ipq_setup_tpm();
+}