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NXP PCF8574 and compatible ICs are simple I2C GPIO expanders. PCF8574 incorporates quasi-bidirectional IO, and simple communication protocol, when IO read is I2C byte read, and IO write is I2C byte write. User can think of it as open-drain port, when line high state is input and line low state is output. Signed-off-by: Dmitrii Sharikhin <d.sharikhin@yadro.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <f1552d822276e878d84c01eba2cf2c7c9ebdde00.camel@yadro.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
26 lines
253 B
Plaintext
26 lines
253 B
Plaintext
config MAX7310
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bool
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depends on I2C
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config PL061
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bool
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config GPIO_KEY
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bool
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config GPIO_MPC8XXX
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bool
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config GPIO_PWR
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bool
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config SIFIVE_GPIO
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bool
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config STM32L4X5_GPIO
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bool
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config PCF8574
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bool
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depends on I2C
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