hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

[media] em28xx: fix the i2c adapter functionality flags 

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>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Frank Schaefer 2013-01-03 14:27:04 -03:00 committed by Mauro Carvalho Chehab
parent 2fcc82d883
commit eaf33c404c
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/media/usb/em28xx/em28xx-i2c.c
View File

@ -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 = {