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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2007-07-18 10:26:38 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2007-07-18 10:26:38 -0300 |
| commit | dc6bcd9a295280818c9a86608ddf1a7e2e5c9d93 (patch) | |
| tree | 55d59c7ed909675912f3de8d2ac37a42c1bf403b /linux/drivers | |
| parent | 41bcd08d3f8d6e3b4ebabf945036a9334f4854a9 (diff) | |
| download | mediapointer-dvb-s2-dc6bcd9a295280818c9a86608ddf1a7e2e5c9d93.tar.gz mediapointer-dvb-s2-dc6bcd9a295280818c9a86608ddf1a7e2e5c9d93.tar.bz2 | |
tm6000: Improve handling of SMBus Write Byte commands followed by a read command.
From: Michel Ludwig <michel.ludwig@gmail.com>
SMBus Write Byte commands followed by a read command on the same I2C
address are not sent out to the chip as they wouldn't have any effect.
Signed-off-by: Michel Ludwig <michel.ludwig@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux/drivers')
| -rw-r--r-- | linux/drivers/staging/tm6000/tm6000-i2c.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/linux/drivers/staging/tm6000/tm6000-i2c.c b/linux/drivers/staging/tm6000/tm6000-i2c.c index ca1fdec40..dade4ab79 100644 --- a/linux/drivers/staging/tm6000/tm6000-i2c.c +++ b/linux/drivers/staging/tm6000/tm6000-i2c.c @@ -146,6 +146,13 @@ static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap, printk(" %02x", msgs[i].buf[byte]); } + /* SMBus Write Byte command followed by a read command */ + if(msgs[i].len == 1 && i+1 < num && msgs[i+1].flags & I2C_M_RD + && msgs[i+1].addr == msgs[i].addr) { + prev_reg = msgs[i].buf[0]; + continue; + } + rc = tm6000_read_write_usb (dev, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, REQ_16_SET_GET_I2CSEQ, |