diff options
| author | Daniel Scheller <d.scheller@gmx.net> | 2018-02-25 07:31:37 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-03-06 11:15:01 -0500 |
| commit | e39b8e945eb749d3bef21b38309f84de8f7a3007 (patch) | |
| tree | acb371ae4e8b557737c15a5ea008b79c78387c41 /drivers/media/pci/ngene/ngene-cards.c | |
| parent | ee93340e98bc9026dedf6e7483f9f092d1765582 (diff) | |
media: ngene: check for CXD2099AR presence before attaching
Currently, if there's no CXD2099AR attached to any expansion connector of
the ngene hardware, it will complain with this on every module load:
cxd2099 1-0040: No CXD2099AR detected at 0x40
cxd2099: probe of 1-0040 failed with error -5
ngene 0000:02:00.0: CXD2099AR attach failed
This happens due to the logic assuming such hardware is always there and
blindly tries to attach the cxd2099 I2C driver. Rather add a probe
function (in ngene-cards.c with a prototype in ngene.h) to check for
the existence of such hardware before probing, and don't try further if
no CXD2099 was found.
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/pci/ngene/ngene-cards.c')
| -rw-r--r-- | drivers/media/pci/ngene/ngene-cards.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/media/pci/ngene/ngene-cards.c b/drivers/media/pci/ngene/ngene-cards.c index dff55c7c9f86..d603d0af703e 100644 --- a/drivers/media/pci/ngene/ngene-cards.c +++ b/drivers/media/pci/ngene/ngene-cards.c @@ -505,6 +505,25 @@ static int port_has_stv0367(struct i2c_adapter *i2c) return 1; } +int ngene_port_has_cxd2099(struct i2c_adapter *i2c, u8 *type) +{ + u8 val; + u8 probe[4] = { 0xe0, 0x00, 0x00, 0x00 }, data[4]; + struct i2c_msg msgs[2] = {{ .addr = 0x40, .flags = 0, + .buf = probe, .len = 4 }, + { .addr = 0x40, .flags = I2C_M_RD, + .buf = data, .len = 4 } }; + val = i2c_transfer(i2c, msgs, 2); + if (val != 2) + return 0; + + if (data[0] == 0x02 && data[1] == 0x2b && data[3] == 0x43) + *type = 2; + else + *type = 1; + return 1; +} + static int demod_attach_drxk(struct ngene_channel *chan, struct i2c_adapter *i2c) { |