mb/google/dedede: Configure I2C ports

Enable I2C ports that are used. Add GPIO configuration for the I2C
ports. Enable config items that are required for I2C HID & Generic devices.

BUG=None
TEST=Build the mainboard.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I12e974530fb5f61fae5d12cadbb3f928e617d73a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38847
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Justin TerAvest <teravest@chromium.org>

src/mainboard/google/dedede/Kconfig

@@ -1,5 +1,7 @@
 config BOARD_GOOGLE_BASEBOARD_DEDEDE
 	def_bool n
+	select DRIVERS_I2C_GENERIC
+	select DRIVERS_I2C_HID
 	select DRIVERS_SPI_ACPI
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_BOARDID

src/mainboard/google/dedede/variants/baseboard/devicetree.cb

@@ -20,11 +20,11 @@ chip soc/intel/tigerlake
 	register "pmc_gpe0_dw2" = "GPP_H"
 
 	register "SerialIoI2cMode" = "{
-		[PchSerialIoIndexI2C0]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C0]  = PchSerialIoPci,
-		[PchSerialIoIndexI2C1]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C1]  = PchSerialIoPci,
-		[PchSerialIoIndexI2C2]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C2]  = PchSerialIoPci,
-		[PchSerialIoIndexI2C3]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C3]  = PchSerialIoPci,
-		[PchSerialIoIndexI2C4]  = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C4]  = PchSerialIoPci,
 		[PchSerialIoIndexI2C5]  = PchSerialIoDisabled,
 	}"
 
@@ -60,12 +60,32 @@ chip soc/intel/tigerlake
 	#|                   | required to set up a BAR  |
 	#|                   | for TPM communication     |
 	#|                   | before memory is up       |
+	#| I2C0              | Trackpad                  |
+	#| I2C1              | Digitizer                 |
+	#| I2C2              | Touchscreen               |
+	#| I2C3              | Camera                    |
+	#| I2C4              | Audio                     |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
 		.gspi[0] = {
 			.speed_mhz = 1,
 			.early_init = 1,
 		},
+		.i2c[0] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[1] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[2] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[3] = {
+			.speed = I2C_SPEED_FAST,
+		},
+		.i2c[4] = {
+			.speed = I2C_SPEED_FAST,
+		},
 	}"
 
 	device domain 0 on
@@ -80,16 +100,16 @@ chip soc/intel/tigerlake
 		device pci 14.2 off end # PMC SRAM
 		device pci 14.3 off end # CNVi wifi
 		device pci 14.5 off end # SDCard
-		device pci 15.0 off end # I2C 0
+		device pci 15.0 on  end # I2C 0
-		device pci 15.1 off end # I2C 1
+		device pci 15.1 on  end # I2C 1
-		device pci 15.2 off end # I2C 2
+		device pci 15.2 on  end # I2C 2
-		device pci 15.3 off end # I2C 3
+		device pci 15.3 on  end # I2C 3
 		device pci 16.0 off end # HECI 1
 		device pci 16.1 off end # HECI 2
 		device pci 16.4 off end # HECI 3
 		device pci 16.5 off end # HECI 4
 		device pci 17.0 off end # SATA
-		device pci 19.0 off end # I2C 4
+		device pci 19.0 on  end # I2C 4
 		device pci 19.1 off end # I2C 5
 		device pci 19.2 on  end # UART 2
 		device pci 1a.0 off end # eMMC

src/mainboard/google/dedede/variants/baseboard/gpio.c

@@ -33,6 +33,14 @@ static const struct pad_config gpio_table[] = {
 	/* B18 : H1_SLAVE_SPI_MOSI_R */
 	PAD_CFG_NF(GPP_B18, NONE, DEEP, NF1),
 
+	/* C16 : AP_I2C_TRACKPAD_SDA_3V3 */
+	PAD_CFG_NF(GPP_C16, NONE, DEEP, NF1),
+	/* C17 : AP_I2C_TRACKPAD_SCL_3V3 */
+	PAD_CFG_NF(GPP_C17, NONE, DEEP, NF1),
+	/* C18 : AP_I2C_EMR_SDA */
+	PAD_CFG_NF(GPP_C18, NONE, DEEP, NF1),
+	/* C19 : AP_I2C_EMR_SCL */
+	PAD_CFG_NF(GPP_C19, NONE, DEEP, NF1),
 	/* C20 : UART_DBG_TX_AP_RX */
 	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
 	/* C21 : UART_AP_TX_DBG_RX */
@@ -41,6 +49,19 @@ static const struct pad_config gpio_table[] = {
 	PAD_NC(GPP_C22, DN_20K),
 	/* C23 : UART2_CTS_N */
 	PAD_NC(GPP_C23, DN_20K),
+
+	/* H4  : AP_I2C_TS_SDA */
+	PAD_CFG_NF(GPP_H4, NONE, DEEP, NF1),
+	/* H5  : AP_I2C_TS_SCL */
+	PAD_CFG_NF(GPP_H5, NONE, DEEP, NF1),
+	/* H6  : AP_I2C_CAM_SDA */
+	PAD_CFG_NF(GPP_H6, NONE, DEEP, NF1),
+	/* H7  : AP_I2C_CAM_SCL */
+	PAD_CFG_NF(GPP_H7, NONE, DEEP, NF1),
+	/* H8  : AP_I2C_AUDIO_SDA */
+	PAD_CFG_NF(GPP_H8, NONE, DEEP, NF1),
+	/* H9  : AP_I2C_AUDIO_SCL */
+	PAD_CFG_NF(GPP_H9, NONE, DEEP, NF1),
 };
 
 /* Early pad configuration in bootblock */