Reinhard Meyer wrote: > Its even simpler, provided the hardware can do open collector. Here was > my solution for AVR32AP7000: >
Then we could add a config for open drain similar to that of linux driver. # ifndef I2C_SDA # ifdef CONFIG_SOFT_I2C_GPIO_SDA_IS_OPEN_DRAIN # define I2C_SDA(bit) gpio_set_value(CONFIG_SOFT_I2C_GPIO_SDA, bit) # else # define I2C_SDA(bit) \ if (bit) { \ gpio_direction_input(CONFIG_SOFT_I2C_GPIO_SDA); \ } else { \ gpio_direction_output(CONFIG_SOFT_I2C_GPIO_SDA, 0);\ } # endif # endif BTW, will you be interested in using common gpio framework for avr32 family? Cheers, Thomas _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot