new file mode 100644
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Common bus abstraction layer.
+ *
+ * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
+ * Copyright (c) 2010, ST-Ericsson
+ */
+#ifndef WFX_BUS_H
+#define WFX_BUS_H
+
+#include <linux/mmc/sdio_func.h>
+#include <linux/spi/spi.h>
+
+#define WFX_REG_CONFIG 0x0
+#define WFX_REG_CONTROL 0x1
+#define WFX_REG_IN_OUT_QUEUE 0x2
+#define WFX_REG_AHB_DPORT 0x3
+#define WFX_REG_BASE_ADDR 0x4
+#define WFX_REG_SRAM_DPORT 0x5
+#define WFX_REG_SET_GEN_R_W 0x6
+#define WFX_REG_FRAME_OUT 0x7
+
+struct hwbus_ops {
+ int (*copy_from_io)(void *bus_priv, unsigned int addr,
+ void *dst, size_t count);
+ int (*copy_to_io)(void *bus_priv, unsigned int addr,
+ const void *src, size_t count);
+ int (*irq_subscribe)(void *bus_priv);
+ int (*irq_unsubscribe)(void *bus_priv);
+ void (*lock)(void *bus_priv);
+ void (*unlock)(void *bus_priv);
+ size_t (*align_size)(void *bus_priv, size_t size);
+};
+
+extern struct sdio_driver wfx_sdio_driver;
+extern struct spi_driver wfx_spi_driver;
+
+#endif