marvell: drivers: Add i2c driver
Add i2c driver for A8K SoC family.
Change-Id: I5932b2fce286d84fc3ad5a74c4c456001faa3196
Signed-off-by: Hanna Hawa <hannah@marvell.com>
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
diff --git a/include/drivers/marvell/a8k_i2c.h b/include/drivers/marvell/a8k_i2c.h
new file mode 100644
index 0000000..8a9abe8
--- /dev/null
+++ b/include/drivers/marvell/a8k_i2c.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+/* This driver provides I2C support for Marvell A8K and compatible SoCs */
+
+#ifndef _A8K_I2C_H_
+#define _A8K_I2C_H_
+
+#include <stdint.h>
+
+/*
+ * Initialization, must be called once on start up, may be called
+ * repeatedly to change the speed and slave addresses.
+ */
+void i2c_init(void *i2c_base);
+
+/*
+ * Read/Write interface:
+ * chip: I2C chip address, range 0..127
+ * addr: Memory (register) address within the chip
+ * alen: Number of bytes to use for addr (typically 1, 2 for larger
+ * memories, 0 for register type devices with only one
+ * register)
+ * buffer: Where to read/write the data
+ * len: How many bytes to read/write
+ *
+ * Returns: 0 on success, not 0 on failure
+ */
+int i2c_read(uint8_t chip,
+ unsigned int addr, int alen, uint8_t *buffer, int len);
+
+int i2c_write(uint8_t chip,
+ unsigned int addr, int alen, uint8_t *buffer, int len);
+#endif