diff options
Diffstat (limited to 'src/mainboard/intel/galileo/gen2.h')
| -rw-r--r-- | src/mainboard/intel/galileo/gen2.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/mainboard/intel/galileo/gen2.h b/src/mainboard/intel/galileo/gen2.h index dc8b6f5d6f..108971b8ba 100644 --- a/src/mainboard/intel/galileo/gen2.h +++ b/src/mainboard/intel/galileo/gen2.h @@ -48,3 +48,28 @@ static const struct reg_script gen2_gpio_init[] = { REG_SCRIPT_END }; + +static const struct reg_script gen2_i2c_init[] = { + /* Route I2C to Arduino Shield connector: + * Set AMUX1_IN (EXP2.P1_4) low + * Configure AMUX1_IN (EXP2.P1_4) as an output + * + * I2C_SDA -> ANALOG_A4 + * I2C_SCL -> ANALOG_A5 + */ + REG_I2C_AND(GEN2_I2C_GPIO_EXP2, GEN2_GPIO_EXP_OUTPUT1, ~BIT4), + REG_I2C_AND(GEN2_I2C_GPIO_EXP2, GEN2_GPIO_EXP_CONFIG1, ~BIT4), + + /* Set all GPIO expander pins connected to the Reset Button as inputs + * Configure Reset Button(EXP1.P1_7) as an input + * Disable pullup on Reset Button(EXP1.P1_7) + * Configure Reset Button(EXP2.P1_7) as an input + * Disable pullup on Reset Button(EXP2.P1_7) + */ + REG_I2C_OR(GEN2_I2C_GPIO_EXP1, GEN2_GPIO_EXP_CONFIG1, BIT7), + REG_I2C_AND(GEN2_I2C_GPIO_EXP1, GEN2_GPIO_EXP_PULL_UP_DOWN_EN1, ~BIT7), + REG_I2C_OR(GEN2_I2C_GPIO_EXP2, GEN2_GPIO_EXP_CONFIG1, BIT7), + REG_I2C_AND(GEN2_I2C_GPIO_EXP2, GEN2_GPIO_EXP_PULL_UP_DOWN_EN1, ~BIT7), + + REG_SCRIPT_END +}; |