renesas: rzg: Add support to identify EK874 RZ/G2E board

Add support to identify Silicon Linux RZ/G2E evaluation kit (EK874).

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Change-Id: Id7bdbc9b0d25aa9af496d58d4bd5055579edc104
diff --git a/drivers/renesas/rzg/board/board.c b/drivers/renesas/rzg/board/board.c
index 60e6380..7636372 100644
--- a/drivers/renesas/rzg/board/board.c
+++ b/drivers/renesas/rzg/board/board.c
@@ -17,6 +17,8 @@
 #define BOARD_DEFAULT		(BOARD_HIHOPE_RZ_G2H << BOARD_CODE_SHIFT)
 #elif (RCAR_LSI == RZ_G2N)
 #define BOARD_DEFAULT		(BOARD_HIHOPE_RZ_G2N << BOARD_CODE_SHIFT)
+#elif (RCAR_LSI == RZ_G2E)
+#define BOARD_DEFAULT		(BOARD_EK874_RZ_G2E << BOARD_CODE_SHIFT)
 #else
 #define BOARD_DEFAULT		(BOARD_HIHOPE_RZ_G2M << BOARD_CODE_SHIFT)
 #endif /* RCAR_LSI == RZ_G2H */
@@ -35,11 +37,13 @@
 #define HM_ID	{ 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
 #define HH_ID	HM_ID
 #define HN_ID	{ 0x20U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define EK_ID	HM_ID
 
 const char *g_board_tbl[] = {
 	[BOARD_HIHOPE_RZ_G2M] = "HiHope RZ/G2M",
 	[BOARD_HIHOPE_RZ_G2H] = "HiHope RZ/G2H",
 	[BOARD_HIHOPE_RZ_G2N] = "HiHope RZ/G2N",
+	[BOARD_EK874_RZ_G2E] = "EK874 RZ/G2E",
 	[BOARD_UNKNOWN] = "unknown"
 };
 
@@ -50,8 +54,12 @@
 		[BOARD_HIHOPE_RZ_G2M] = HM_ID,
 		[BOARD_HIHOPE_RZ_G2H] = HH_ID,
 		[BOARD_HIHOPE_RZ_G2N] = HN_ID,
+		[BOARD_EK874_RZ_G2E] = EK_ID,
 	};
-	uint32_t reg, boardInfo;
+	uint32_t reg;
+#if (RCAR_LSI != RZ_G2E)
+	uint32_t boardInfo;
+#endif /* RCAR_LSI == RZ_G2E */
 
 	if (board_id == BOARD_ID_UNKNOWN) {
 		board_id = BOARD_DEFAULT;
@@ -66,6 +74,13 @@
 	}
 
 	reg = mmio_read_32(RCAR_PRR);
+#if (RCAR_LSI == RZ_G2E)
+	if (reg & RCAR_MINOR_MASK) {
+		*rev = 0x30U;
+	} else {
+		*rev = board_tbl[*type][(uint8_t)(board_id & BOARD_REV_MASK)];
+	}
+#else
 	if ((reg & PRR_CUT_MASK) == RCAR_M3_CUT_VER11) {
 		*rev = board_tbl[*type][(uint8_t)(board_id & BOARD_REV_MASK)];
 	} else {
@@ -78,4 +93,5 @@
 				((boardInfo & GP5_21_BIT) >> 17)) + 0x30U;
 		}
 	}
+#endif /* RCAR_LSI == RZ_G2E */
 }