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| author | Marek Behún <marek.behun@nic.cz> | 2017-06-09 19:28:43 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2017-07-12 06:56:48 +0200 |
| commit | 8e6eda7cda6c06e173eb5d6430dbe2fec732caf7 (patch) | |
| tree | a7c633c591dd671f7445f7928f240436a17318fa /drivers/i2c | |
| parent | c2502e7b82b68945ef89569e7555add30189e976 (diff) | |
| download | u-boot-8e6eda7cda6c06e173eb5d6430dbe2fec732caf7.zip u-boot-8e6eda7cda6c06e173eb5d6430dbe2fec732caf7.tar.gz u-boot-8e6eda7cda6c06e173eb5d6430dbe2fec732caf7.tar.bz2 | |
drivers/i2c/muxes/pca954x: Add pca9547 I2C mux support
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>
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/muxes/pca954x.c | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/drivers/i2c/muxes/pca954x.c b/drivers/i2c/muxes/pca954x.c index 1a67618..383f72f 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 }, { } }; |