[PATCH 3/4] ARM: Renesas: R-Car3: Add cpu and revision handlers

[Dirk Behme <dirk.behme@de.bosch.com>]

The Renesas R-Car3 product register (PRR) helps us to identify the
SoC and revision we are running on. Add helper functions to check
for this easily in code where it's needed.

Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
---
 include/linux/soc/renesas/rcar3-prr.h | 51 +++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 include/linux/soc/renesas/rcar3-prr.h

diff --git a/include/linux/soc/renesas/rcar3-prr.h b/include/linux/soc/renesas/rcar3-prr.h
new file mode 100644
index 0000000..9bbe369
--- /dev/null
+++ b/include/linux/soc/renesas/rcar3-prr.h
@@ -0,0 +1,51 @@
+/*
+ * R-Car3 Product Register (PRR) support
+ *
+ * Copyright (C) 2016 Robert Bosch Car Multimedia GmbH
+ *               Dirk Behme <dirk.behme@de.bosch.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef __SOC_RENESAS_RCAR3_PRR_H__
+#define __SOC_RENESAS_RCAR3_PRR_H__
+
+#define PRODUCT_MASK	(0x7f << 8)
+#define PRODUCT_H3	(0x4f << 8)
+#define PRODUCT_M3W	(0x52 << 8)
+
+#define CUT_MASK	(0x000000ff)
+#define CUT_ES1		(0x0 << 0)
+#define CUT_ES2		(0x1 << 4)
+#define CUT_ES3		(0x1 << 5)
+
+extern unsigned int __rcar3_prr;
+
+static inline bool cpu_is_rcar3_h3(void)
+{
+	return (__rcar3_prr & PRODUCT_MASK) == PRODUCT_H3;
+}
+
+static inline bool cpu_is_rcar3_m3w(void)
+{
+	return (__rcar3_prr & PRODUCT_MASK) == PRODUCT_M3W;
+}
+
+static inline bool revision_is_rcar3_es1(void)
+{
+	return (__rcar3_prr & CUT_MASK) == CUT_ES1;
+}
+
+static inline bool revision_is_rcar3_es2(void)
+{
+	return (__rcar3_prr & CUT_MASK) == CUT_ES2;
+}
+
+static inline bool revision_is_rcar3_es3(void)
+{
+	return (__rcar3_prr & CUT_MASK) == CUT_ES3;
+}
+
+#endif /* __SOC_RENESAS_RCAR3_PRR_H__ */
-- 
2.8.0