diff -drupN a/drivers/spi/spi-slave-protocol.h b/drivers/spi/spi-slave-protocol.h
--- a/drivers/spi/spi-slave-protocol.h	1970-01-01 03:00:00.000000000 +0300
+++ b/drivers/spi/spi-slave-protocol.h	2022-06-12 05:28:14.000000000 +0300
@@ -0,0 +1,65 @@
+/*
+ * drivers/spi/spi-slave-protocol.h
+ *
+ * Copyright (C) 2019 - Reuuimlla Limited
+ * Yihuasheng <yihuasheng@allwinnertech.com>
+ *
+ * SUNXI SPI Slave Protocol Definition
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+/*
+#define HEAD_LENGTH
+#define OP_MASK		0
+#define ADDR_MASK_0	1
+#define ADDR_MASK_1	2
+#define ADDR_MASK_2	3
+#define LENGTH_MASK_0	4
+#define LENGTH_MASK_1	5
+#define LENGTH_MASK_2	6
+#define SUNXI_OP_WRITE	0x01
+#define SUNXI_OP_READ	0x03
+*/
+
+#define HEAD_LEN 5
+#define PKT_MAX_LEN 0x40
+#define STATUS_LEN 0x01
+
+#define STATUS_WRITABLE 0x02
+#define STATUS_NOTWRITABLE 0x03
+#define STATUS_READABLE 0x04
+
+#define OP_MASK		0
+#define ADDR_MASK_0	1
+#define ADDR_MASK_1	2
+#define ADDR_MASK_2	3
+#define LENGTH_MASK	4
+#define SUNXI_OP_WRITE	0x01
+#define SUNXI_OP_READ	0x03
+
+
+
+struct sunxi_spi_slave_head {
+	int op_code;
+	int addr;
+	int len;
+};
+
+struct device_data {
+	unsigned char *tx_buf, *rx_buf;
+	unsigned char len; /* max len is 64 */
+};
+
+struct sunxi_slave {
+	struct sunxi_spi_slave_head *head;
+	struct device_data *data;
+	struct device_data *(*set_up_txdata)(struct sunxi_spi_slave_head *head);
+};
+
+
+
+