zynqmp: pm: Add LPD WDT clock to the pm_clock structure

This patch adds LPD WDT clock node to the pm_clock clocks structure list
so that LPD WDT can be used from Linux.

Also this patch removes the CLK_LPD_LSBUS from invalid clock list to
allow the registration of this clock to CCF framework as it is the
parent of LPD WDT.
Signed-off-by: Mounika Grace Akula <mounika.grace.akula@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: Iea065aa8150eaba4bb4b42bc6be1fd4b7fe7b403

plat/xilinx/zynqmp/include/zynqmp_def.h

 /*
- * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -330,6 +330,7 @@
 #define IOU_SLCR_GEM_CLK_CTRL		(IOU_SLCR_BASEADDR + 0x308)
 #define IOU_SLCR_CAN_MIO_CTRL		(IOU_SLCR_BASEADDR + 0x304)
 #define FPD_SLCR_WDT_CLK_SEL		(FPD_SLCR_BASEADDR + 0x100)
+#define IOU_SLCR_WDT_CLK_SEL		(IOU_SLCR_BASEADDR + 0x300)
 
 /* Global general storage register base address */
 #define GGS_BASEADDR		(0xFFD80030U)

plat/xilinx/zynqmp/pm_service/pm_api_clock.c

@@ -2198,6 +2198,18 @@ static struct pm_clock clocks[] = {
 		.nodes = &can1_nodes,
 		.num_nodes = ARRAY_SIZE(can1_nodes),
 	},
+	[CLK_LPD_WDT] = {
+		.name = "lpd_wdt",
+		.control_reg = IOU_SLCR_WDT_CLK_SEL,
+		.status_reg = 0,
+		.parents = &((int32_t []) {
+			CLK_LPD_LSBUS,
+			EXT_CLK_SWDT1 | CLK_EXTERNAL_PARENT,
+			CLK_NA_PARENT
+		}),
+		.nodes = &wdt_nodes,
+		.num_nodes = ARRAY_SIZE(wdt_nodes),
+	},
 };
 
 static struct pm_ext_clock ext_clocks[] = {
@@ -2343,7 +2355,6 @@ static uint32_t pm_clk_invalid_list[] = {CLK_USB0, CLK_USB1, CLK_CSU_SPB,
 	CLK_TOPSW_LSBUS,
 	CLK_GTGREF0_REF,
 	CLK_LPD_SWITCH,
-	CLK_LPD_LSBUS,
 	CLK_CPU_R5,
 	CLK_CPU_R5_CORE,
 	CLK_CSU_SPB,

plat/xilinx/zynqmp/pm_service/pm_api_clock.h

@@ -169,6 +169,7 @@ enum clock_id {
 	CLK_GEM1_REF_UNGATED,
 	CLK_GEM2_REF_UNGATED,
 	CLK_GEM3_REF_UNGATED,
+	CLK_LPD_WDT,
 	END_OF_OUTPUT_CLKS,
 };