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0b1d7b7271
This adds the PCA9546 4-channel i2c bus switch. Signed-off-by: Chris Packham <judge.packham@gmail.com> Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net> Reviewed-by: Heiko Schocher <hs@denx.de>
47 lines
1.7 KiB
Plaintext
47 lines
1.7 KiB
Plaintext
config I2C_MUX
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bool "Support I2C multiplexers"
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depends on DM_I2C
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help
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This enables I2C buses to be multiplexed, so that you can select
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one of several buses using some sort of control mechanism. The
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bus select is handled automatically when that bus is accessed,
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using a suitable I2C MUX driver.
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config SPL_I2C_MUX
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bool "Support I2C multiplexers on SPL"
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depends on I2C_MUX
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help
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This enables I2C buses to be multiplexed, so that you can select
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one of several buses using some sort of control mechanism. The
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bus select is handled automatically when that bus is accessed,
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using a suitable I2C MUX driver.
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config I2C_ARB_GPIO_CHALLENGE
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bool "GPIO-based I2C arbitration"
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depends on I2C_MUX
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help
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If you say yes to this option, support will be included for an
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I2C multimaster arbitration scheme using GPIOs and a challenge &
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response mechanism where masters have to claim the bus by asserting
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a GPIO.
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config I2C_MUX_PCA954x
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tristate "TI PCA954x I2C Mux/switches"
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depends on I2C_MUX
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help
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If you say yes here you get support for the TI PCA954x I2C mux/switch
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devices. It is x width I2C multiplexer which enables to partitioning
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I2C bus and connect multiple devices with the same address to the same
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I2C controller where driver handles proper routing to target i2c
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device. Supported chips are PCA9543, PCA9544, PCA9546, PCA9547,
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PCA9548 and PCA9646.
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config I2C_MUX_GPIO
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tristate "GPIO-based I2C multiplexer"
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depends on I2C_MUX && DM_GPIO
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help
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If you say yes to this option, support will be included for
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a GPIO based I2C multiplexer. This driver provides access to
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I2C busses connected through a MUX, which is controlled
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through GPIO pins.
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