@ -13,11 +13,40 @@
DECLARE_GLOBAL_DATA_PTR ;
enum pca_type {
PCA9544 ,
PCA9547 ,
PCA9548
} ;
struct chip_desc {
u8 enable ;
enum muxtype {
pca954x_ismux = 0 ,
pca954x_isswi ,
} muxtype ;
} ;
struct pca954x_priv {
u32 addr ; /* I2C mux address */
u32 width ; /* I2C mux width - number of busses */
} ;
static const struct chip_desc chips [ ] = {
[ PCA9544 ] = {
. enable = 0x4 ,
. muxtype = pca954x_ismux ,
} ,
[ PCA9547 ] = {
. enable = 0x8 ,
. muxtype = pca954x_ismux ,
} ,
[ PCA9548 ] = {
. enable = 0x8 ,
. muxtype = pca954x_isswi ,
} ,
} ;
static int pca954x_deselect ( struct udevice * mux , struct udevice * bus ,
uint channel )
{
@ -31,7 +60,13 @@ static int pca954x_select(struct udevice *mux, struct udevice *bus,
uint channel )
{
struct pca954x_priv * priv = dev_get_priv ( mux ) ;
uchar byte = 1 < < channel ;
const struct chip_desc * chip = & chips [ dev_get_driver_data ( mux ) ] ;
uchar byte ;
if ( chip - > muxtype = = pca954x_ismux )
byte = channel | chip - > enable ;
else
byte = 1 < < channel ;
return dm_i2c_write ( mux , priv - > addr , & byte , 1 ) ;
}
@ -42,8 +77,9 @@ static const struct i2c_mux_ops pca954x_ops = {
} ;
static const struct udevice_id pca954x_ids [ ] = {
{ . compatible = " nxp,pca9548 " , . data = ( ulong ) 8 } ,
{ . compatible = " nxp,pca9544 " , . data = ( ulong ) 4 } ,
{ . compatible = " nxp,pca9544 " , . data = PCA9544 } ,
{ . compatible = " nxp,pca9547 " , . data = PCA9547 } ,
{ . compatible = " nxp,pca9548 " , . data = PCA9548 } ,
{ }
} ;