From 9c3c5e0737c91f5523f93797a2b38b9477f241b7 Mon Sep 17 00:00:00 2001
From: Tejas Patel <tejas.patel@xilinx.com>
Date: Tue, 8 Jan 2019 01:46:38 -0800
Subject: [PATCH] xilinx: versal: Implement reset related PM APIs

Implement below reset related APIs:
  - Reset assert
  - Get reset status

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: Id42c9d3950a0d69125cb0eab79b75e5d22674f14
---
 plat/xilinx/versal/pm_service/pm_api_sys.c | 35 ++++++++++++++++++++++
 plat/xilinx/versal/pm_service/pm_api_sys.h |  2 ++
 plat/xilinx/versal/pm_service/pm_defs.h    |  2 ++
 3 files changed, 39 insertions(+)

diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.c b/plat/xilinx/versal/pm_service/pm_api_sys.c
index 64c1e3503..51f1c2d4d 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.c
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.c
@@ -235,3 +235,38 @@ enum pm_ret_status pm_get_device_status(uint32_t device_id, uint32_t *response)
 
 	return pm_ipi_send_sync(primary_proc, payload, response, 3);
 }
+
+/**
+ * pm_reset_assert() - Assert/De-assert reset
+ * @reset	Reset ID
+ * @assert	Assert (1) or de-assert (0)
+ *
+ * @return	Returns status, either success or error+reason
+ */
+enum pm_ret_status pm_reset_assert(uint32_t reset, bool assert)
+{
+	uint32_t payload[PAYLOAD_ARG_CNT];
+
+	/* Send request to the PMC */
+	PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_RESET_ASSERT, reset,
+			 assert);
+
+	return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
+}
+
+/**
+ * pm_reset_get_status() - Get current status of a reset line
+ * @reset	Reset ID
+ * @status	Returns current status of selected reset ID
+ *
+ * @return	Returns status, either success or error+reason
+ */
+enum pm_ret_status pm_reset_get_status(uint32_t reset, uint32_t *status)
+{
+	uint32_t payload[PAYLOAD_ARG_CNT];
+
+	/* Send request to the PMC */
+	PM_PACK_PAYLOAD2(payload, LIBPM_MODULE_ID, PM_RESET_ASSERT, reset);
+
+	return pm_ipi_send_sync(primary_proc, payload, status, 1);
+}
diff --git a/plat/xilinx/versal/pm_service/pm_api_sys.h b/plat/xilinx/versal/pm_service/pm_api_sys.h
index 6e50e94b9..28e5504a7 100644
--- a/plat/xilinx/versal/pm_service/pm_api_sys.h
+++ b/plat/xilinx/versal/pm_service/pm_api_sys.h
@@ -30,5 +30,7 @@ enum pm_ret_status pm_release_device(uint32_t device_id);
 enum pm_ret_status pm_set_requirement(uint32_t device_id, uint32_t capabilities,
 				      uint32_t latency, uint32_t qos);
 enum pm_ret_status pm_get_device_status(uint32_t device_id, uint32_t *response);
+enum pm_ret_status pm_reset_assert(uint32_t reset, bool assert);
+enum pm_ret_status pm_reset_get_status(uint32_t reset, uint32_t *status);
 
 #endif /* PM_API_SYS_H */
diff --git a/plat/xilinx/versal/pm_service/pm_defs.h b/plat/xilinx/versal/pm_service/pm_defs.h
index feaeee120..1b8871f7f 100644
--- a/plat/xilinx/versal/pm_service/pm_defs.h
+++ b/plat/xilinx/versal/pm_service/pm_defs.h
@@ -31,6 +31,8 @@
 #define PM_REQUEST_DEVICE		13U
 #define PM_RELEASE_DEVICE		14U
 #define PM_SET_REQUIREMENT		15U
+#define PM_RESET_ASSERT			17U
+#define PM_RESET_GET_STATUS		18U
 
 /*********************************************************************
  * Enum definitions