Hello Marek,
Am 06.06.2017 um 14:04 schrieb Marek Behun:
From: Marek Behún marek.behun@nic.cz
This I2C mux is found, for example, on the Turris Omnia board.
Signed-off-by: Marek Behun marek.behun@nic.cz
Reviewed-by: Heiko Schocher hs@denx.de
bye, Heiko
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 }, { } };