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| author | Olli Salonen <olli.salonen@iki.fi> | 2015-05-05 16:54:18 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-12 16:21:29 (GMT) |
| commit | d744a0cb8a819e93ad3852705a8df7bbe4599ad4 (patch) | |
| tree | 4c82f33fba145aaeca6c110217960bf40f90d3cd /drivers/media/usb/dvb-usb-v2 | |
| parent | ee3c3e46885946cc041f08ec68e7c5b91b087cbe (diff) | |
| download | linux-d744a0cb8a819e93ad3852705a8df7bbe4599ad4.tar.xz | |
[media] rtl28xxu: add I2C read without write
Add support for I2C read operation without a preceeding write.
While here, change the error code to EOPNOTSUPP in case an
unsupported I2C operation is attempted.
Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/usb/dvb-usb-v2')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/rtl28xxu.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c index 895441f..54cb109 100644 --- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c +++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c @@ -232,8 +232,14 @@ static int rtl28xxu_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[], req.data = msg[0].buf; ret = rtl28xxu_ctrl_msg(d, &req); } + } else if (num == 1 && (msg[0].flags & I2C_M_RD)) { + req.value = (msg[0].addr << 1); + req.index = CMD_I2C_DA_RD; + req.size = msg[0].len; + req.data = msg[0].buf; + ret = rtl28xxu_ctrl_msg(d, &req); } else { - ret = -EINVAL; + ret = -EOPNOTSUPP; } err_mutex_unlock: |