[darjeeling,dv] Copy pwrmgr_if from integrated

hw/top_darjeeling/dv/env/pwrmgr_low_power_if.sv

@@ -0,0 +1,34 @@
+// Copyright lowRISC contributors (OpenTitan project).
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Legacy pwrmgr_if.sv has import pwrmgr_env_pkg::*;
+// inside interface.
+// To avoid unnecessary compile overhead, create separate interface
+// probing low_power_o
+interface pwrmgr_low_power_if (
+  input logic clk,
+  input logic fast_clk,
+  input logic rst_n
+);
+
+  // low_power indicates the PWRMGR starts entering low power state. When the
+  // signal is high, the chip does not yet complete the power down.
+  logic low_power;
+
+  // If `in_sleep` is 1, it indicates, the chip is in either normal sleep or
+  // deep sleep state.
+  logic in_sleep;
+
+  // Deep Power down indicator (while `low_power` is high)
+  logic deep_powerdown;
+
+  // slow clock
+  clocking cb @(posedge clk);
+  endclocking
+
+  // main clock
+  clocking fast_cb @(posedge fast_clk);
+  endclocking
+
+endinterface // pwrmgr_low_power_if

hw/top_darjeeling/dv/pwrmgr_low_power_if.core

@@ -0,0 +1,38 @@
+CAPI=2:
+# Copyright lowRISC contributors (OpenTitan project).
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+name: "lowrisc:systems:pwrmgr_if:0.1"
+description: "Power manager interface"
+
+filesets:
+  files_rtl:
+    files:
+      - env/pwrmgr_low_power_if.sv
+    file_type: systemVerilogSource
+
+  files_verilator_waiver:
+    depend:
+      # common waivers
+      - lowrisc:lint:common
+      - lowrisc:lint:comportable
+
+  files_ascentlint_waiver:
+    depend:
+      # common waivers
+      - lowrisc:lint:common
+      - lowrisc:lint:comportable
+
+  files_veriblelint_waiver:
+    depend:
+      # common waivers
+      - lowrisc:lint:common
+      - lowrisc:lint:comportable
+
+targets:
+  default: &default_target
+    filesets:
+      - tool_verilator   ? (files_verilator_waiver)
+      - tool_ascentlint  ? (files_ascentlint_waiver)
+      - tool_veriblelint ? (files_veriblelint_waiver)
+      - files_rtl

hw/top_earlgrey/dv/env/pwrmgr_low_power_if.sv

@@ -2,11 +2,9 @@
 // Licensed under the Apache License, Version 2.0, see LICENSE for details.
 // SPDX-License-Identifier: Apache-2.0
 //
-// sample only pwrmgr.low_power_o
-//
 // Legacy pwrmgr_if.sv has import pwrmgr_env_pkg::*;
 // inside interface.
-// To avoid unnecessary compile overhead, create separte interface
+// To avoid unnecessary compile overhead, create separate interface
 // probing low_power_o
 interface pwrmgr_low_power_if (
   input logic clk,