1 files changed, 98 insertions, 0 deletions
diff --git a/board/volmar/i2c.c b/board/volmar/i2c.c
new file mode 100644
index 0000000000..b63cfa645f
--- /dev/null
+++ b/board/volmar/i2c.c
@@ -0,0 +1,98 @@
+/* Copyright 2022 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+#include "compile_time_macros.h"
+#include "hooks.h"
+#include "i2c.h"
+
+#define BOARD_ID_FAST_PLUS_CAPABLE	2
+
+/* I2C port map configuration */
+const struct i2c_port_t i2c_ports[] = {
+	{
+		/* I2C0 */
+		.name = "sensor",
+		.port = I2C_PORT_SENSOR,
+		.kbps = 400,
+		.scl = GPIO_EC_I2C_SENSOR_SCL,
+		.sda = GPIO_EC_I2C_SENSOR_SDA,
+	},
+	{
+		/* I2C1 */
+		.name = "tcpc0,2",
+		.port = I2C_PORT_USB_C0_C2_TCPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C0_C2_TCPC_SCL,
+		.sda = GPIO_EC_I2C_USB_C0_C2_TCPC_SDA,
+	},
+	{
+		/* I2C2 */
+		.name = "ppc0,2",
+		.port = I2C_PORT_USB_C0_C2_PPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C0_C2_PPC_BC_SCL,
+		.sda = GPIO_EC_I2C_USB_C0_C2_PPC_BC_SDA,
+	},
+	{
+		/* I2C3 */
+		.name = "retimer0,2",
+		.port = I2C_PORT_USB_C0_C2_MUX,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C0_C2_RT_SCL,
+		.sda = GPIO_EC_I2C_USB_C0_C2_RT_SDA,
+	},
+	{
+		/* I2C4 C1 TCPC */
+		.name = "tcpc1",
+		.port = I2C_PORT_USB_C1_TCPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C1_TCPC_SCL,
+		.sda = GPIO_EC_I2C_USB_C1_TCPC_SDA,
+		.flags = I2C_PORT_FLAG_DYNAMIC_SPEED,
+	},
+	{
+		/* I2C5 */
+		.name = "battery",
+		.port = I2C_PORT_BATTERY,
+		.kbps = 100,
+		.scl = GPIO_EC_I2C_BAT_SCL,
+		.sda = GPIO_EC_I2C_BAT_SDA,
+	},
+	{
+		/* I2C6 */
+		.name = "ppc1",
+		.port = I2C_PORT_USB_C1_PPC,
+		.kbps = 1000,
+		.scl = GPIO_EC_I2C_USB_C1_MIX_SCL,
+		.sda = GPIO_EC_I2C_USB_C1_MIX_SDA,
+		.flags = I2C_PORT_FLAG_DYNAMIC_SPEED,
+	},
+	{
+		/* I2C7 */
+		.name = "eeprom",
+		.port = I2C_PORT_EEPROM,
+		.kbps = 400,
+		.scl = GPIO_EC_I2C_MISC_SCL_R,
+		.sda = GPIO_EC_I2C_MISC_SDA_R,
+	},
+};
+const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
+
+/*
+ * I2C controllers are initialized in main.c. This sets the speed much
+ * later, but before I2C peripherals are initialized.
+ */
+static void set_board_legacy_i2c_speeds(void)
+{
+	if (get_board_id() >= BOARD_ID_FAST_PLUS_CAPABLE)
+		return;
+
+	ccprints("setting USB DB I2C buses to 400 kHz\n");
+
+	i2c_set_freq(I2C_PORT_USB_C1_TCPC, I2C_FREQ_400KHZ);
+	i2c_set_freq(I2C_PORT_USB_C1_PPC, I2C_FREQ_400KHZ);
+}
+DECLARE_HOOK(HOOK_INIT, set_board_legacy_i2c_speeds, HOOK_PRIO_INIT_I2C - 1);