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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> |
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| .. | ||
| aspeed_gpio.c | ||
| bcm2835_gpio.c | ||
| bcm2838_gpio.c | ||
| gpio_key.c | ||
| gpio_pwr.c | ||
| imx_gpio.c | ||
| Kconfig | ||
| max7310.c | ||
| meson.build | ||
| mpc8xxx.c | ||
| npcm7xx_gpio.c | ||
| nrf51_gpio.c | ||
| omap_gpio.c | ||
| pcf8574.c | ||
| pl061.c | ||
| sifive_gpio.c | ||
| stm32l4x5_gpio.c | ||
| trace-events | ||
| trace.h | ||
| zaurus.c | ||