Merge tag 'tpm-030822' of https://source.denx.de/u-boot/custodians/u-boot-tpm

[platform/kernel/u-boot.git] / include / i2c_eeprom.h

diff --git a/include/i2c_eeprom.h b/include/i2c_eeprom.h
index ea6c962..32dcb03 100644 (file)
--- 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