[PATCH v3 22/24] firmware: xilinx: Add system shutdown API interface

[Jolly Shah]

From: Rajan Vaja <rajan.vaja@xxxxxxxxxx>

Add system shutdown API interface which asks firmware to
perform system shutdown/restart.

Signed-off-by: Rajan Vaja <rajan.vaja@xxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
Signed-off-by: Jolly Shah <jollys@xxxxxxxxxx>
Signed-off-by: Jolly Shah <jolly.shah@xxxxxxxxxx>
---
 drivers/firmware/xilinx/zynqmp.c     | 13 +++++++++++++
 include/linux/firmware/xlnx-zynqmp.h |  4 +++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index f671b6b..d3f637b 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -834,6 +834,19 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
 EXPORT_SYMBOL_GPL(zynqmp_pm_set_requirement);
 
 /**
+ * zynqmp_pm_system_shutdown - PM call to request a system shutdown or restart
+ * @type:	Shutdown or restart? 0 for shutdown, 1 for restart
+ * @subtype:	Specifies which system should be restarted or shut down
+ *
+ * Return:	Returns status, either success or error+reason
+ */
+int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype)
+{
+	return zynqmp_pm_invoke_fn(PM_SYSTEM_SHUTDOWN, type, subtype,
+				   0, 0, NULL);
+}
+
+/**
  * ggs_show - Show global general storage (ggs) sysfs attribute
  * @device: Device structure
  * @attr: Device attribute structure
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 8ccaa39..13b9fdb 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -66,7 +66,8 @@
 
 enum pm_api_id {
 	PM_GET_API_VERSION = 1,
-	PM_REQUEST_NODE = 13,
+	PM_SYSTEM_SHUTDOWN = 12,
+	PM_REQUEST_NODE,
 	PM_RELEASE_NODE,
 	PM_SET_REQUIREMENT,
 	PM_RESET_ASSERT = 17,
@@ -327,6 +328,7 @@ int zynqmp_pm_write_ggs(u32 index, u32 value);
 int zynqmp_pm_read_ggs(u32 index, u32 *value);
 int zynqmp_pm_write_pggs(u32 index, u32 value);
 int zynqmp_pm_read_pggs(u32 index, u32 *value);
+int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
 int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,
 			u32 arg2, u32 arg3, u32 *ret_payload);
 
-- 
2.7.4