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 fucntion pointer is provided in
struct i2c_algorithm.
Signed-off-by: Frank Schäfer <fschaefer.oss@xxxxxxxxxxxxxx>
---
drivers/media/usb/em28xx/em28xx-i2c.c | 6 +++++-
1 Datei geändert, 5 Zeilen hinzugefügt(+), 1 Zeile entfernt(-)
diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c
index 940ff4d..7118535 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 = {
--
1.7.10.4
--
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