X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fi2c_eeprom.h;h=32dcb03497309681f44f0c1e8aa740a2d15a35db;hb=46b5c8ed017958fc387ab86c71ae6c90abb6793c;hp=ea6c962a3932f3bc7a28276a93e2bc9c45f2a2cf;hpb=a5a58826110eb3da2956c6b3213bd750e166d75c;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/i2c_eeprom.h b/include/i2c_eeprom.h
index ea6c962..32dcb03 100644
--- a/include/i2c_eeprom.h
+++ b/include/i2c_eeprom.h
@@ -1,19 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2014 Google, Inc
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __I2C_EEPROM
 #define __I2C_EEPROM
 
+struct udevice;
+
 struct i2c_eeprom_ops {
 	int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size);
 	int (*write)(struct udevice *dev, int offset, const uint8_t *buf,
 		     int size);
+	int (*size)(struct udevice *dev);
 };
 
 struct i2c_eeprom {
+	/* The EEPROM's page size in byte */
+	unsigned long pagesize;
+	/* The EEPROM's capacity in bytes */
+	unsigned long size;
 };
 
+#if CONFIG_IS_ENABLED(I2C_EEPROM)
+/*
+ * i2c_eeprom_read() - read bytes from an I2C EEPROM chip
+ *
+ * @dev:	Chip to read from
+ * @offset:	Offset within chip to start reading
+ * @buf:	Place to put data
+ * @size:	Number of bytes to read
+ *
+ * Return: 0 on success, -ve on failure
+ */
+int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size);
+
+/*
+ * i2c_eeprom_write() - write bytes to an I2C EEPROM chip
+ *
+ * @dev:	Chip to write to
+ * @offset:	Offset within chip to start writing
+ * @buf:	Buffer containing data to write
+ * @size:	Number of bytes to write
+ *
+ * Return: 0 on success, -ve on failure
+ */
+int i2c_eeprom_write(struct udevice *dev, int offset, const uint8_t *buf,
+		     int size);
+
+/*
+ * i2c_eeprom_size() - get size of I2C EEPROM chip
+ *
+ * @dev:	Chip to query
+ *
+ * Return: +ve size in bytes on success, -ve on failure
+ */
+int i2c_eeprom_size(struct udevice *dev);
+
+#else /* !I2C_EEPROM */
+
+static inline int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf,
+				  int size)
+{
+	return -ENOSYS;
+}
+
+static inline int i2c_eeprom_write(struct udevice *dev, int offset,
+				   const uint8_t *buf, int size)
+{
+	return -ENOSYS;
+}
+
+static inline int i2c_eeprom_size(struct udevice *dev)
+{
+	return -ENOSYS;
+}
+
+#endif /* I2C_EEPROM */
+
 #endif