This I2C mux is found, for example, on the Turris Omnia board.
Signed-off-by: Marek Behun <marek.be...@nic.cz>
Reviewed-by: Heiko Schocher <h...@denx.de>
diff --git a/drivers/i2c/muxes/pca954x.c b/drivers/i2c/muxes/pca954x.c
index 1a6761858c..383f72f552 100644
--- a/drivers/i2c/muxes/pca954x.c
+++ b/drivers/i2c/muxes/pca954x.c
@@ -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 },
{ }
};
--
2.13.0
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