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Subject[PATCH v3 22/24] firmware: xilinx: Add system shutdown API interface
Date
From: Rajan Vaja <rajan.vaja@xilinx.com>

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

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
---
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
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