diff options
| author | Jean Delvare <khali@linux-fr.org> | 2011-11-07 12:24:49 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-11-08 17:38:10 +0400 |
| commit | 819cd82b0a994d9d83dc1d1ced1088e71d702d4c (patch) | |
| tree | 3035a7d8c8ae3b9236482cd11d68620c7806d8d9 | |
| parent | fdb5a9111ef77d537efb86e90e8073ebfd0b553e (diff) | |
| download | linux-819cd82b0a994d9d83dc1d1ced1088e71d702d4c.tar.xz | |
[media] usbvision: Drop broken 10-bit I2C address support
The support for 10-bit I2C addresses in usbvision seems plain broken
to me. I had already noticed that back in February 2007 [1]. The code
was not fixed since then, so I take it that it's not actually needed.
And as a matter of fact I don't know of any 10-bit addressed I2C
tuner, encode, decoder or the like.
So let's simply get rid of the broken and useless code.
I'm also adding I2C_FUNC_I2C, as the driver and hardware support plain
I2C messaging.
[1] http://marc.info/?l=linux-i2c&m=117499415208244&w=2
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/usbvision/usbvision-i2c.c | 46 |
1 files changed, 12 insertions, 34 deletions
diff --git a/drivers/media/video/usbvision/usbvision-i2c.c b/drivers/media/video/usbvision/usbvision-i2c.c index d7f97513b289..89fec029e924 100644 --- a/drivers/media/video/usbvision/usbvision-i2c.c +++ b/drivers/media/video/usbvision/usbvision-i2c.c @@ -110,42 +110,20 @@ static inline int usb_find_address(struct i2c_adapter *i2c_adap, unsigned char addr; int ret; - if ((flags & I2C_M_TEN)) { - /* a ten bit address */ - addr = 0xf0 | ((msg->addr >> 7) & 0x03); - /* try extended address code... */ - ret = try_write_address(i2c_adap, addr, retries); - if (ret != 1) { - dev_err(&i2c_adap->dev, - "died at extended address code, while writing\n"); - return -EREMOTEIO; - } - add[0] = addr; - if (flags & I2C_M_RD) { - /* okay, now switch into reading mode */ - addr |= 0x01; - ret = try_read_address(i2c_adap, addr, retries); - if (ret != 1) { - dev_err(&i2c_adap->dev, - "died at extended address code, while reading\n"); - return -EREMOTEIO; - } - } - } else { /* normal 7bit address */ - addr = (msg->addr << 1); - if (flags & I2C_M_RD) - addr |= 1; + addr = (msg->addr << 1); + if (flags & I2C_M_RD) + addr |= 1; - add[0] = addr; - if (flags & I2C_M_RD) - ret = try_read_address(i2c_adap, addr, retries); - else - ret = try_write_address(i2c_adap, addr, retries); + add[0] = addr; + if (flags & I2C_M_RD) + ret = try_read_address(i2c_adap, addr, retries); + else + ret = try_write_address(i2c_adap, addr, retries); + + if (ret != 1) + return -EREMOTEIO; - if (ret != 1) - return -EREMOTEIO; - } return 0; } @@ -184,7 +162,7 @@ usbvision_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num) static u32 functionality(struct i2c_adapter *adap) { - return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR; + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; } /* -----exported algorithm data: ------------------------------------- */ |