soc/intel/apollolake: Add chip initialization

Change-Id: I54532b71c7649f7eeccbb2213b31418cfdbfb00c
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/13911
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/chip.h

@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Intel Corp.
+ * (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _SOC_APOLLOLAKE_CHIP_H_
+#define _SOC_APOLLOLAKE_CHIP_H_
+
+#define CLKREQ_DISABLED		0xf
+
+struct soc_intel_apollolake_config {
+	/*
+	 * Mapping from PCIe root port to CLKREQ input on the SOC. The SOC has
+	 * four CLKREQ inputs, but six root ports. Root ports without an
+	 * associated CLKREQ signal must be marked with "CLKREQ_DISABLED"
+	 */
+	uint8_t pcie_rp0_clkreq_pin;
+	uint8_t pcie_rp1_clkreq_pin;
+	uint8_t pcie_rp2_clkreq_pin;
+	uint8_t pcie_rp3_clkreq_pin;
+	uint8_t pcie_rp4_clkreq_pin;
+	uint8_t pcie_rp5_clkreq_pin;
+};
+
+#endif	/* _SOC_APOLLOLAKE_CHIP_H_ */