[PATCH 2/6] soc: add polarfire soc header file

[<conor.dooley@xxxxxxxxxxxxx>]

From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>

Add header to support the Microchip PolarFire SoC MSS system
controller mailbox.

Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
---
 include/soc/microchip/mpfs.h | 50 ++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 include/soc/microchip/mpfs.h

diff --git a/include/soc/microchip/mpfs.h b/include/soc/microchip/mpfs.h
new file mode 100644
index 000000000000..60311ab72b76
--- /dev/null
+++ b/include/soc/microchip/mpfs.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Microchip MPFS mailbox
+ *
+ * Copyright (c) 2020 Microchip Corporation. All rights reserved.
+ *
+ * Author: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
+ *
+ */
+
+#ifndef __SOC_MPFS_H__
+#define __SOC_MPFS_H__
+
+#include <linux/types.h>
+#include <linux/of_device.h>
+
+struct mpfs_sys_controller;
+
+struct mpfs_mss_msg {
+	u8 cmd_opcode;
+	u16 cmd_data_size;
+	u16 response_size;
+	u8 *cmd_data;
+	u16 mailbox_offset;
+	u16 response_offset;
+};
+
+#if IS_ENABLED(CONFIG_MPFS_SYS_CONTROLLER)
+
+int mpfs_blocking_transaction(struct mpfs_sys_controller *mpfs_client, void *msg,
+			      void *response, u16 response_size_bytes);
+
+struct mpfs_sys_controller *mpfs_sys_controller_get(struct device_node *mailbox_node);
+
+#else
+
+static int mpfs_blocking_transaction(struct mpfs_sys_controller *mpfs_client, void *msg,
+				     void *response, u16 response_size_bytes)
+{
+	return -ENOSYS;
+};
+
+struct mpfs_sys_controller *mpfs_sys_controller_get(struct device_node *mailbox_node)
+{
+	return NULL;
+}
+
+#endif /* IS_ENABLED(CONFIG_MPFS_SYS_CONTROLLER) */
+
+#endif /* __SOC_MPFS_H__ */
-- 
2.17.1