mb/system76/bonw14: Enable TAS5825M smart amp

The Bonobo has 2 AMPs: one for the speakers and one for the subwoofer.

Smart AMP data was collected using a logic analyzer connected to the IC
during system start on proprietary firmware. This data is then used to
generate a C file [1].

[1]: https://github.com/system76/smart-amp

Change-Id: I5389a9890563ebd3adb20096b6225f474bc006f9
Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/mainboard/system76/bonw14/Kconfig

@@ -8,6 +8,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select DRIVERS_GENERIC_CBFS_SERIAL
 	select DRIVERS_GENERIC_CBFS_UUID
 	select DRIVERS_I2C_HID
+	select DRIVERS_I2C_TAS5825M
 	select EC_SYSTEM76_EC
 	select EC_SYSTEM76_EC_DGPU
 	select HAVE_ACPI_RESUME

src/mainboard/system76/bonw14/Makefile.mk

@@ -10,3 +10,4 @@ romstage-y += romstage.c
 ramstage-y += ramstage.c
 ramstage-y += gpio.c
 ramstage-y += hda_verb.c
+ramstage-y += tas5825m.c

src/mainboard/system76/bonw14/devicetree.cb

@@ -219,7 +219,16 @@ chip soc/intel/cannonlake
 		device pci 1f.3 on      # Intel HDA
 			register "PchHdaAudioLinkHda" = "1"
 		end
-		device pci 1f.4 on  end # SMBus
+		device pci 1f.4 on      # SMBus
+			chip drivers/i2c/tas5825m
+				register "id" = "0"
+				device i2c 4e on end # (8bit address: 0x9c)
+			end
+			chip drivers/i2c/tas5825m
+				register "id" = "1"
+				device i2c 4f on end # (8bit address: 0x9e)
+			end
+		end
 		device pci 1f.5 on  end # PCH SPI
 		device pci 1f.6 off end # GbE
 	end

src/mainboard/system76/bonw14/tas5825m.c

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <drivers/i2c/tas5825m/tas5825m.h>
+
+#include "tas5825m-normal.c"
+#include "tas5825m-sub.c"
+
+int tas5825m_setup(struct device *dev, int id)
+{
+	if (id == 0)
+		return tas5825m_setup_normal(dev);
+	if (id == 1)
+		return tas5825m_setup_sub(dev);
+	return -1;
+}