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path: root/drivers/firmware/xilinx/zynqmp.c
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Diffstat (limited to 'drivers/firmware/xilinx/zynqmp.c')
-rw-r--r--drivers/firmware/xilinx/zynqmp.c40
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 0dd117860b63..450c5f6a1cbf 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -23,6 +23,7 @@
#include <linux/hashtable.h>
#include <linux/firmware/xlnx-zynqmp.h>
+#include <linux/firmware/xlnx-event-manager.h>
#include "zynqmp-debug.h"
/* Max HashMap Order for PM API feature check (1<<7 = 128) */
@@ -38,6 +39,8 @@
static bool feature_check_enabled;
static DEFINE_HASHTABLE(pm_api_features_map, PM_API_FEATURE_CHECK_MAX_ORDER);
+static struct platform_device *em_dev;
+
/**
* struct pm_api_feature_data - PM API Feature data
* @pm_api_id: PM API Id, used as key to index into hashmap
@@ -160,7 +163,7 @@ static noinline int do_fw_call_hvc(u64 arg0, u64 arg1, u64 arg2,
*
* Return: Returns status, either success or error+reason
*/
-static int zynqmp_pm_feature(u32 api_id)
+int zynqmp_pm_feature(const u32 api_id)
{
int ret;
u32 ret_payload[PAYLOAD_ARG_CNT];
@@ -197,6 +200,7 @@ static int zynqmp_pm_feature(u32 api_id)
return ret;
}
+EXPORT_SYMBOL_GPL(zynqmp_pm_feature);
/**
* zynqmp_pm_invoke_fn() - Invoke the system-level platform management layer
@@ -1117,6 +1121,29 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out)
EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine);
/**
+ * zynqmp_pm_register_notifier() - PM API for register a subsystem
+ * to be notified about specific
+ * event/error.
+ * @node: Node ID to which the event is related.
+ * @event: Event Mask of Error events for which wants to get notified.
+ * @wake: Wake subsystem upon capturing the event if value 1
+ * @enable: Enable the registration for value 1, disable for value 0
+ *
+ * This function is used to register/un-register for particular node-event
+ * combination in firmware.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+
+int zynqmp_pm_register_notifier(const u32 node, const u32 event,
+ const u32 wake, const u32 enable)
+{
+ return zynqmp_pm_invoke_fn(PM_REGISTER_NOTIFIER, node, event,
+ wake, enable, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_register_notifier);
+
+/**
* 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
@@ -1471,6 +1498,15 @@ static int zynqmp_firmware_probe(struct platform_device *pdev)
zynqmp_pm_api_debugfs_init();
+ np = of_find_compatible_node(NULL, NULL, "xlnx,versal");
+ if (np) {
+ em_dev = platform_device_register_data(&pdev->dev, "xlnx_event_manager",
+ -1, NULL, 0);
+ if (IS_ERR(em_dev))
+ dev_err_probe(&pdev->dev, PTR_ERR(em_dev), "EM register fail with error\n");
+ }
+ of_node_put(np);
+
return of_platform_populate(dev->of_node, NULL, NULL, dev);
}
@@ -1488,6 +1524,8 @@ static int zynqmp_firmware_remove(struct platform_device *pdev)
kfree(feature_data);
}
+ platform_device_unregister(em_dev);
+
return 0;
}