diff options
| author | Matthias Schwarzott <zzam@gentoo.org> | 2014-10-02 02:21:03 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-10-30 17:38:43 -0200 |
| commit | 15c212dd0f7af8650808ada802c9317b4b0ec5a7 (patch) | |
| tree | 4565a1250b62fdd3bd93c100fc546793712c1e4f /drivers/media/usb/cx231xx/cx231xx-i2c.c | |
| parent | b9ce9dfd18eb30a2c57de6f410a749c58d47743f (diff) | |
[media] cx231xx: register i2c mux adapters for bus 1
I2C bus 1 has internally a switch. Use it as I2C_1_MUX_1 and
I2C_1_MUX_3, letting the I2C core handling the switch.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/usb/cx231xx/cx231xx-i2c.c')
| -rw-r--r-- | drivers/media/usb/cx231xx/cx231xx-i2c.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/drivers/media/usb/cx231xx/cx231xx-i2c.c b/drivers/media/usb/cx231xx/cx231xx-i2c.c index 9ade3acbc877..3e9dfd808518 100644 --- a/drivers/media/usb/cx231xx/cx231xx-i2c.c +++ b/drivers/media/usb/cx231xx/cx231xx-i2c.c @@ -24,6 +24,7 @@ #include <linux/kernel.h> #include <linux/usb.h> #include <linux/i2c.h> +#include <linux/i2c-mux.h> #include <media/v4l2-common.h> #include <media/tuner.h> @@ -547,6 +548,46 @@ int cx231xx_i2c_unregister(struct cx231xx_i2c *bus) return 0; } +/* + * cx231xx_i2c_mux_select() + * switch i2c master number 1 between port1 and port3 + */ +static int cx231xx_i2c_mux_select(struct i2c_adapter *adap, + void *mux_priv, u32 chan_id) +{ + struct cx231xx *dev = mux_priv; + + return cx231xx_enable_i2c_port_3(dev, chan_id); +} + +int cx231xx_i2c_mux_register(struct cx231xx *dev, int mux_no) +{ + struct i2c_adapter *i2c_parent = &dev->i2c_bus[1].i2c_adap; + /* what is the correct mux_dev? */ + struct device *mux_dev = &dev->udev->dev; + + dev->i2c_mux_adap[mux_no] = i2c_add_mux_adapter(i2c_parent, + mux_dev, + dev /* mux_priv */, + 0, + mux_no /* chan_id */, + 0 /* class */, + &cx231xx_i2c_mux_select, + NULL); + + if (!dev->i2c_mux_adap[mux_no]) + cx231xx_warn("%s: i2c mux %d register FAILED\n", + dev->name, mux_no); + + return 0; +} + +void cx231xx_i2c_mux_unregister(struct cx231xx *dev, int mux_no) +{ + i2c_del_mux_adapter(dev->i2c_mux_adap[mux_no]); + dev->i2c_mux_adap[mux_no] = NULL; +} + struct i2c_adapter *cx231xx_get_i2c_adap(struct cx231xx *dev, int i2c_port) { switch (i2c_port) { @@ -557,8 +598,9 @@ struct i2c_adapter *cx231xx_get_i2c_adap(struct cx231xx *dev, int i2c_port) case I2C_2: return &dev->i2c_bus[2].i2c_adap; case I2C_1_MUX_1: + return dev->i2c_mux_adap[0]; case I2C_1_MUX_3: - return &dev->i2c_bus[1].i2c_adap; + return dev->i2c_mux_adap[1]; default: return NULL; } |