i2c: add i2c_get_device_id() to get the standard i2c device id
Can be used during probe to double check that the probed device is
what is expected.
Loosely based on code from Adrian Fiergolski <adrian.fiergolski@cern.ch>.
Tested-by: Adrian Fiergolski <adrian.fiergolski@cern.ch>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Peter Rosin <peda@axentia.se>
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 419a38e..44ad14e 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -47,6 +47,7 @@
struct i2c_adapter;
struct i2c_client;
struct i2c_driver;
+struct i2c_device_identity;
union i2c_smbus_data;
struct i2c_board_info;
enum i2c_slave_event;
@@ -186,8 +187,37 @@
extern s32
i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client,
u8 command, u8 length, u8 *values);
+int i2c_get_device_id(const struct i2c_client *client,
+ struct i2c_device_identity *id);
#endif /* I2C */
+/**
+ * struct i2c_device_identity - i2c client device identification
+ * @manufacturer_id: 0 - 4095, database maintained by NXP
+ * @part_id: 0 - 511, according to manufacturer
+ * @die_revision: 0 - 7, according to manufacturer
+ */
+struct i2c_device_identity {
+ u16 manufacturer_id;
+#define I2C_DEVICE_ID_NXP_SEMICONDUCTORS 0
+#define I2C_DEVICE_ID_NXP_SEMICONDUCTORS_1 1
+#define I2C_DEVICE_ID_NXP_SEMICONDUCTORS_2 2
+#define I2C_DEVICE_ID_NXP_SEMICONDUCTORS_3 3
+#define I2C_DEVICE_ID_RAMTRON_INTERNATIONAL 4
+#define I2C_DEVICE_ID_ANALOG_DEVICES 5
+#define I2C_DEVICE_ID_STMICROELECTRONICS 6
+#define I2C_DEVICE_ID_ON_SEMICONDUCTOR 7
+#define I2C_DEVICE_ID_SPRINTEK_CORPORATION 8
+#define I2C_DEVICE_ID_ESPROS_PHOTONICS_AG 9
+#define I2C_DEVICE_ID_FUJITSU_SEMICONDUCTOR 10
+#define I2C_DEVICE_ID_FLIR 11
+#define I2C_DEVICE_ID_O2MICRO 12
+#define I2C_DEVICE_ID_ATMEL 13
+#define I2C_DEVICE_ID_NONE 0xffff
+ u16 part_id;
+ u8 die_revision;
+};
+
enum i2c_alert_protocol {
I2C_PROTOCOL_SMBUS_ALERT,
I2C_PROTOCOL_SMBUS_HOST_NOTIFY,