From: Maksim Kiselev bigunclemax@gmail.com

Add support for the following Maxim chips using the existing PCA954x driver: - MAX7356 - MAX7357 - MAX7358 - MAX7367 - MAX7368 - MAX7369

All added Maxim chips behave like the PCA954x, where a single SMBUS byte write selects up to 8 channels to be bridged to the primary bus.

Tested using the MAX7358.

Signed-off-by: Maksim Kiselev bigunclemax@gmail.com --- Hi, friends!

I have a custom board with MAX7358 GPIO expander. This patch is the port of Linux commit:

81694437b6eb i2c: muxes: pca954x: Add MAX735x/MAX736x support

Best wishes, Maksim.

drivers/i2c/muxes/Kconfig | 5 +++++ drivers/i2c/muxes/pca954x.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+)

diff --git a/drivers/i2c/muxes/Kconfig b/drivers/i2c/muxes/Kconfig index 323c4fbe9c..cd5579aa55 100644 --- a/drivers/i2c/muxes/Kconfig +++ b/drivers/i2c/muxes/Kconfig @@ -36,6 +36,11 @@ config I2C_MUX_PCA954x device. Supported chips are PCA9543, PCA9544, PCA9546, PCA9547, PCA9548 and PCA9646.

+ It's also compatible to Maxims MAX735x I2C switch chips, which are controlled + as the NXP PCA9548 and the MAX736x chips that act like the PCA9544. + This includes the: + MAX7356, MAX7357, MAX7358, MAX7367, MAX7368 and MAX7369 + config I2C_MUX_GPIO tristate "GPIO-based I2C multiplexer" depends on I2C_MUX && DM_GPIO diff --git a/drivers/i2c/muxes/pca954x.c b/drivers/i2c/muxes/pca954x.c index 795288fe2e..9dd2697270 100644 --- a/drivers/i2c/muxes/pca954x.c +++ b/drivers/i2c/muxes/pca954x.c @@ -14,6 +14,12 @@ #include <asm-generic/gpio.h>

enum pca_type { + MAX7356, + MAX7357, + MAX7358, + MAX7367, + MAX7368, + MAX7369, PCA9543, PCA9544, PCA9546, @@ -39,6 +45,31 @@ struct pca954x_priv { };

static const struct chip_desc chips[] = { + [MAX7356] = { + .muxtype = pca954x_isswi, + .width = 8, + }, + [MAX7357] = { + .muxtype = pca954x_isswi, + .width = 8, + }, + [MAX7358] = { + .muxtype = pca954x_isswi, + .width = 8, + }, + [MAX7367] = { + .muxtype = pca954x_isswi, + .width = 4, + }, + [MAX7368] = { + .muxtype = pca954x_isswi, + .width = 4, + }, + [MAX7369] = { + .enable = 0x4, + .muxtype = pca954x_ismux, + .width = 4, + }, [PCA9543] = { .muxtype = pca954x_isswi, .width = 2, @@ -102,6 +133,12 @@ static const struct i2c_mux_ops pca954x_ops = { };

static const struct udevice_id pca954x_ids[] = { + { .compatible = "maxim,max7356", .data = MAX7356 }, + { .compatible = "maxim,max7357", .data = MAX7357 }, + { .compatible = "maxim,max7358", .data = MAX7358 }, + { .compatible = "maxim,max7367", .data = MAX7367 }, + { .compatible = "maxim,max7368", .data = MAX7368 }, + { .compatible = "maxim,max7369", .data = MAX7369 }, { .compatible = "nxp,pca9543", .data = PCA9543 }, { .compatible = "nxp,pca9544", .data = PCA9544 }, { .compatible = "nxp,pca9546", .data = PCA9546 },