mainboard/intel/galileo: Add I2C chip initialization
Add I2C chip initialization for the Galileo boards.
TEST=Build and run on Galileo Gen2
Change-Id: Ib5284d5cd7a67de2f3f98940837ceb2aa69af468
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/14829
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/intel/galileo/gen2.h b/src/mainboard/intel/galileo/gen2.h
index dc8b6f5..108971b 100644
--- a/src/mainboard/intel/galileo/gen2.h
+++ b/src/mainboard/intel/galileo/gen2.h
@@ -48,3 +48,28 @@
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
+};