| Message ID | 1357237626-3358-4-git-send-email-fschaefer.oss@googlemail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c index 55308bb..1994083 100644 --- a/drivers/media/usb/em28xx/em28xx-i2c.c +++ b/drivers/media/usb/em28xx/em28xx-i2c.c @@ -445,7 +445,11 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len) */ static u32 functionality(struct i2c_adapter *adap) { - return I2C_FUNC_SMBUS_EMUL; + struct em28xx *dev = adap->algo_data; + u32 func_flags = I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; + if (dev->board.is_em2800) + func_flags &= ~I2C_FUNC_SMBUS_WRITE_BLOCK_DATA; + return func_flags; } static struct i2c_algorithm em28xx_algo = {
I2C_FUNC_SMBUS_EMUL includes flag I2C_FUNC_SMBUS_WRITE_BLOCK_DATA which signals that up to 31 data bytes can be written to the ic2 client. But the EM2800 supports only i2c messages with max. 4 data bytes. I2C_FUNC_IC2 should be set if a master_xfer function pointer is provided in struct i2c_algorithm. Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com> --- drivers/media/usb/em28xx/em28xx-i2c.c | 6 +++++- 1 Datei geändert, 5 Zeilen hinzugefügt(+), 1 Zeile entfernt(-)