drivers: marvell: add CCU driver API for window state checking

Add ccu_is_win_enabled() API for checking the CCU window
state using AP and window indexes.

Change-Id: Ib955a2cac28b2729b0a763f3bbbea28b476a2fe4
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>

drivers/marvell/ccu.c

@@ -54,8 +54,8 @@ static void dump_ccu(int ap_index)
 							      win_id));
 			start = ((uint64_t)alr << ADDRESS_SHIFT);
 			end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT);
-			printf("\tccu    %02x     0x%016llx 0x%016llx\n",
-			       target_id, start, end);
+			printf("\tccu%d    %02x     0x%016llx 0x%016llx\n",
+			       win_id, target_id, start, end);
 		}
 	}
 	win_cr = mmio_read_32(CCU_WIN_GCR_OFFSET(ap_index));
@@ -81,6 +81,12 @@ void ccu_win_check(struct addr_map_win *win)
 	}
 }
 
+int ccu_is_win_enabled(int ap_index, uint32_t win_id)
+{
+	return mmio_read_32(CCU_WIN_CR_OFFSET(ap_index, win_id)) &
+			    WIN_ENABLE_BIT;
+}
+
 void ccu_enable_win(int ap_index, struct addr_map_win *win, uint32_t win_id)
 {
 	uint32_t ccu_win_reg;

include/drivers/marvell/ccu.h

@@ -46,6 +46,7 @@ void ccu_dram_win_config(int ap_index, struct addr_map_win *win);
 void ccu_dram_target_set(int ap_index, uint32_t target);
 void ccu_save_win_all(int ap_id);
 void ccu_restore_win_all(int ap_id);
+int ccu_is_win_enabled(int ap_index, uint32_t win_id);
 #endif
 
 #endif /* CCU_H */