Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 1367 insertions, 0 deletions

diff --git a/drivers/platform/x86/intel/int3472/Kconfig b/drivers/platform/x86/intel/int3472/Kconfig
new file mode 100644
index 000000000..62e5d4cf9
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/Kconfig
@@ -0,0 +1,30 @@
+config INTEL_SKL_INT3472
+	tristate "Intel SkyLake ACPI INT3472 Driver"
+	depends on ACPI
+	depends on COMMON_CLK
+	depends on I2C
+	depends on GPIOLIB
+	depends on REGULATOR
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  This driver adds power controller support for the Intel SkyCam
+	  devices found on the Intel SkyLake platforms.
+
+	  The INT3472 is a camera power controller, a logical device found on
+	  Intel Skylake-based systems that can map to different hardware
+	  devices depending on the platform. On machines designed for Chrome OS
+	  it maps to a TPS68470 camera PMIC. On machines designed for Windows,
+	  it maps to either a TP68470 camera PMIC, a uP6641Q sensor PMIC, or a
+	  set of discrete GPIOs and power gates.
+
+	  If your device was designed for Chrome OS, this driver will provide
+	  an ACPI OpRegion, which must be available before any of the devices
+	  using it are probed. For this reason, you should select Y if your
+	  device was designed for ChromeOS. For the same reason the
+	  I2C_DESIGNWARE_PLATFORM option must be set to Y too.
+
+	  Say Y or M here if you have a SkyLake device designed for use
+	  with Windows or ChromeOS. Say N here if you are not sure.
+
+	  The module will be named "intel-skl-int3472".
diff --git a/drivers/platform/x86/intel/int3472/Makefile b/drivers/platform/x86/intel/int3472/Makefile
new file mode 100644
index 000000000..cfec7784c
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_INTEL_SKL_INT3472)		+= intel_skl_int3472_discrete.o \
+					   intel_skl_int3472_tps68470.o
+intel_skl_int3472_discrete-y		:= discrete.o clk_and_regulator.o common.o
+intel_skl_int3472_tps68470-y		:= tps68470.o tps68470_board_data.o common.o
diff --git a/drivers/platform/x86/intel/int3472/clk_and_regulator.c b/drivers/platform/x86/intel/int3472/clk_and_regulator.c
new file mode 100644
index 000000000..74dc2cff7
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/clk_and_regulator.c
@@ -0,0 +1,211 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#include <linux/acpi.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/slab.h>
+
+#include "common.h"
+
+/*
+ * The regulators have to have .ops to be valid, but the only ops we actually
+ * support are .enable and .disable which are handled via .ena_gpiod. Pass an
+ * empty struct to clear the check without lying about capabilities.
+ */
+static const struct regulator_ops int3472_gpio_regulator_ops;
+
+static int skl_int3472_clk_prepare(struct clk_hw *hw)
+{
+	struct int3472_gpio_clock *clk = to_int3472_clk(hw);
+
+	gpiod_set_value_cansleep(clk->ena_gpio, 1);
+	gpiod_set_value_cansleep(clk->led_gpio, 1);
+
+	return 0;
+}
+
+static void skl_int3472_clk_unprepare(struct clk_hw *hw)
+{
+	struct int3472_gpio_clock *clk = to_int3472_clk(hw);
+
+	gpiod_set_value_cansleep(clk->ena_gpio, 0);
+	gpiod_set_value_cansleep(clk->led_gpio, 0);
+}
+
+static int skl_int3472_clk_enable(struct clk_hw *hw)
+{
+	/*
+	 * We're just turning a GPIO on to enable the clock, which operation
+	 * has the potential to sleep. Given .enable() cannot sleep, but
+	 * .prepare() can, we toggle the GPIO in .prepare() instead. Thus,
+	 * nothing to do here.
+	 */
+	return 0;
+}
+
+static void skl_int3472_clk_disable(struct clk_hw *hw)
+{
+	/* Likewise, nothing to do here... */
+}
+
+static unsigned int skl_int3472_get_clk_frequency(struct int3472_discrete_device *int3472)
+{
+	union acpi_object *obj;
+	unsigned int freq;
+
+	obj = skl_int3472_get_acpi_buffer(int3472->sensor, "SSDB");
+	if (IS_ERR(obj))
+		return 0; /* report rate as 0 on error */
+
+	if (obj->buffer.length < CIO2_SENSOR_SSDB_MCLKSPEED_OFFSET + sizeof(u32)) {
+		dev_err(int3472->dev, "The buffer is too small\n");
+		kfree(obj);
+		return 0;
+	}
+
+	freq = *(u32 *)(obj->buffer.pointer + CIO2_SENSOR_SSDB_MCLKSPEED_OFFSET);
+
+	kfree(obj);
+	return freq;
+}
+
+static unsigned long skl_int3472_clk_recalc_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	struct int3472_gpio_clock *clk = to_int3472_clk(hw);
+
+	return clk->frequency;
+}
+
+static const struct clk_ops skl_int3472_clock_ops = {
+	.prepare = skl_int3472_clk_prepare,
+	.unprepare = skl_int3472_clk_unprepare,
+	.enable = skl_int3472_clk_enable,
+	.disable = skl_int3472_clk_disable,
+	.recalc_rate = skl_int3472_clk_recalc_rate,
+};
+
+int skl_int3472_register_clock(struct int3472_discrete_device *int3472)
+{
+	struct clk_init_data init = {
+		.ops = &skl_int3472_clock_ops,
+		.flags = CLK_GET_RATE_NOCACHE,
+	};
+	int ret;
+
+	init.name = kasprintf(GFP_KERNEL, "%s-clk",
+			      acpi_dev_name(int3472->adev));
+	if (!init.name)
+		return -ENOMEM;
+
+	int3472->clock.frequency = skl_int3472_get_clk_frequency(int3472);
+
+	int3472->clock.clk_hw.init = &init;
+	int3472->clock.clk = clk_register(&int3472->adev->dev,
+					  &int3472->clock.clk_hw);
+	if (IS_ERR(int3472->clock.clk)) {
+		ret = PTR_ERR(int3472->clock.clk);
+		goto out_free_init_name;
+	}
+
+	int3472->clock.cl = clkdev_create(int3472->clock.clk, NULL,
+					  int3472->sensor_name);
+	if (!int3472->clock.cl) {
+		ret = -ENOMEM;
+		goto err_unregister_clk;
+	}
+
+	kfree(init.name);
+	return 0;
+
+err_unregister_clk:
+	clk_unregister(int3472->clock.clk);
+out_free_init_name:
+	kfree(init.name);
+
+	return ret;
+}
+
+void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472)
+{
+	clkdev_drop(int3472->clock.cl);
+	clk_unregister(int3472->clock.clk);
+}
+
+int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
+				   struct acpi_resource_gpio *agpio)
+{
+	const struct int3472_sensor_config *sensor_config;
+	char *path = agpio->resource_source.string_ptr;
+	struct regulator_consumer_supply supply_map;
+	struct regulator_init_data init_data = { };
+	struct regulator_config cfg = { };
+	int ret;
+
+	sensor_config = int3472->sensor_config;
+	if (IS_ERR(sensor_config)) {
+		dev_err(int3472->dev, "No sensor module config\n");
+		return PTR_ERR(sensor_config);
+	}
+
+	if (!sensor_config->supply_map.supply) {
+		dev_err(int3472->dev, "No supply name defined\n");
+		return -ENODEV;
+	}
+
+	init_data.constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
+	init_data.num_consumer_supplies = 1;
+	supply_map = sensor_config->supply_map;
+	supply_map.dev_name = int3472->sensor_name;
+	init_data.consumer_supplies = &supply_map;
+
+	snprintf(int3472->regulator.regulator_name,
+		 sizeof(int3472->regulator.regulator_name), "%s-regulator",
+		 acpi_dev_name(int3472->adev));
+	snprintf(int3472->regulator.supply_name,
+		 GPIO_REGULATOR_SUPPLY_NAME_LENGTH, "supply-0");
+
+	int3472->regulator.rdesc = INT3472_REGULATOR(
+						int3472->regulator.regulator_name,
+						int3472->regulator.supply_name,
+						&int3472_gpio_regulator_ops);
+
+	int3472->regulator.gpio = acpi_get_and_request_gpiod(path, agpio->pin_table[0],
+							     "int3472,regulator");
+	if (IS_ERR(int3472->regulator.gpio)) {
+		dev_err(int3472->dev, "Failed to get regulator GPIO line\n");
+		return PTR_ERR(int3472->regulator.gpio);
+	}
+
+	/* Ensure the pin is in output mode and non-active state */
+	gpiod_direction_output(int3472->regulator.gpio, 0);
+
+	cfg.dev = &int3472->adev->dev;
+	cfg.init_data = &init_data;
+	cfg.ena_gpiod = int3472->regulator.gpio;
+
+	int3472->regulator.rdev = regulator_register(int3472->dev,
+						     &int3472->regulator.rdesc,
+						     &cfg);
+	if (IS_ERR(int3472->regulator.rdev)) {
+		ret = PTR_ERR(int3472->regulator.rdev);
+		goto err_free_gpio;
+	}
+
+	return 0;
+
+err_free_gpio:
+	gpiod_put(int3472->regulator.gpio);
+
+	return ret;
+}
+
+void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472)
+{
+	regulator_unregister(int3472->regulator.rdev);
+	gpiod_put(int3472->regulator.gpio);
+}
diff --git a/drivers/platform/x86/intel/int3472/common.c b/drivers/platform/x86/intel/int3472/common.c
new file mode 100644
index 000000000..9db2bb0bb
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/common.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#include <linux/acpi.h>
+#include <linux/slab.h>
+
+#include "common.h"
+
+union acpi_object *skl_int3472_get_acpi_buffer(struct acpi_device *adev, char *id)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_handle handle = adev->handle;
+	union acpi_object *obj;
+	acpi_status status;
+
+	status = acpi_evaluate_object(handle, id, NULL, &buffer);
+	if (ACPI_FAILURE(status))
+		return ERR_PTR(-ENODEV);
+
+	obj = buffer.pointer;
+	if (!obj)
+		return ERR_PTR(-ENODEV);
+
+	if (obj->type != ACPI_TYPE_BUFFER) {
+		acpi_handle_err(handle, "%s object is not an ACPI buffer\n", id);
+		kfree(obj);
+		return ERR_PTR(-EINVAL);
+	}
+
+	return obj;
+}
+
+int skl_int3472_fill_cldb(struct acpi_device *adev, struct int3472_cldb *cldb)
+{
+	union acpi_object *obj;
+	int ret;
+
+	obj = skl_int3472_get_acpi_buffer(adev, "CLDB");
+	if (IS_ERR(obj))
+		return PTR_ERR(obj);
+
+	if (obj->buffer.length > sizeof(*cldb)) {
+		acpi_handle_err(adev->handle, "The CLDB buffer is too large\n");
+		ret = -EINVAL;
+		goto out_free_obj;
+	}
+
+	memcpy(cldb, obj->buffer.pointer, obj->buffer.length);
+	ret = 0;
+
+out_free_obj:
+	kfree(obj);
+	return ret;
+}
+
+/* sensor_adev_ret may be NULL, name_ret must not be NULL */
+int skl_int3472_get_sensor_adev_and_name(struct device *dev,
+					 struct acpi_device **sensor_adev_ret,
+					 const char **name_ret)
+{
+	struct acpi_device *adev = ACPI_COMPANION(dev);
+	struct acpi_device *sensor;
+	int ret = 0;
+
+	sensor = acpi_dev_get_next_consumer_dev(adev, NULL);
+	if (!sensor) {
+		dev_err(dev, "INT3472 seems to have no dependents.\n");
+		return -ENODEV;
+	}
+
+	*name_ret = devm_kasprintf(dev, GFP_KERNEL, I2C_DEV_NAME_FORMAT,
+				   acpi_dev_name(sensor));
+	if (!*name_ret)
+		ret = -ENOMEM;
+
+	if (ret == 0 && sensor_adev_ret)
+		*sensor_adev_ret = sensor;
+	else
+		acpi_dev_put(sensor);
+
+	return ret;
+}
diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h
new file mode 100644
index 000000000..53270d19c
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/common.h
@@ -0,0 +1,122 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#ifndef _INTEL_SKL_INT3472_H
+#define _INTEL_SKL_INT3472_H
+
+#include <linux/clk-provider.h>
+#include <linux/gpio/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/types.h>
+
+/* FIXME drop this once the I2C_DEV_NAME_FORMAT macro has been added to include/linux/i2c.h */
+#ifndef I2C_DEV_NAME_FORMAT
+#define I2C_DEV_NAME_FORMAT					"i2c-%s"
+#endif
+
+/* PMIC GPIO Types */
+#define INT3472_GPIO_TYPE_RESET					0x00
+#define INT3472_GPIO_TYPE_POWERDOWN				0x01
+#define INT3472_GPIO_TYPE_POWER_ENABLE				0x0b
+#define INT3472_GPIO_TYPE_CLK_ENABLE				0x0c
+#define INT3472_GPIO_TYPE_PRIVACY_LED				0x0d
+
+#define INT3472_PDEV_MAX_NAME_LEN				23
+#define INT3472_MAX_SENSOR_GPIOS				3
+
+#define GPIO_REGULATOR_NAME_LENGTH				21
+#define GPIO_REGULATOR_SUPPLY_NAME_LENGTH			9
+
+#define CIO2_SENSOR_SSDB_MCLKSPEED_OFFSET			86
+
+#define INT3472_REGULATOR(_name, _supply, _ops)			\
+	(const struct regulator_desc) {				\
+		.name = _name,					\
+		.supply_name = _supply,				\
+		.type = REGULATOR_VOLTAGE,			\
+		.ops = _ops,					\
+		.owner = THIS_MODULE,				\
+	}
+
+#define to_int3472_clk(hw)					\
+	container_of(hw, struct int3472_gpio_clock, clk_hw)
+
+#define to_int3472_device(clk)					\
+	container_of(clk, struct int3472_discrete_device, clock)
+
+struct acpi_device;
+struct i2c_client;
+struct platform_device;
+
+struct int3472_cldb {
+	u8 version;
+	/*
+	 * control logic type
+	 * 0: UNKNOWN
+	 * 1: DISCRETE(CRD-D)
+	 * 2: PMIC TPS68470
+	 * 3: PMIC uP6641
+	 */
+	u8 control_logic_type;
+	u8 control_logic_id;
+	u8 sensor_card_sku;
+	u8 reserved[28];
+};
+
+struct int3472_gpio_function_remap {
+	const char *documented;
+	const char *actual;
+};
+
+struct int3472_sensor_config {
+	const char *sensor_module_name;
+	struct regulator_consumer_supply supply_map;
+	const struct int3472_gpio_function_remap *function_maps;
+};
+
+struct int3472_discrete_device {
+	struct acpi_device *adev;
+	struct device *dev;
+	struct acpi_device *sensor;
+	const char *sensor_name;
+
+	const struct int3472_sensor_config *sensor_config;
+
+	struct int3472_gpio_regulator {
+		char regulator_name[GPIO_REGULATOR_NAME_LENGTH];
+		char supply_name[GPIO_REGULATOR_SUPPLY_NAME_LENGTH];
+		struct gpio_desc *gpio;
+		struct regulator_dev *rdev;
+		struct regulator_desc rdesc;
+	} regulator;
+
+	struct int3472_gpio_clock {
+		struct clk *clk;
+		struct clk_hw clk_hw;
+		struct clk_lookup *cl;
+		struct gpio_desc *ena_gpio;
+		struct gpio_desc *led_gpio;
+		u32 frequency;
+	} clock;
+
+	unsigned int ngpios; /* how many GPIOs have we seen */
+	unsigned int n_sensor_gpios; /* how many have we mapped to sensor */
+	struct gpiod_lookup_table gpios;
+};
+
+union acpi_object *skl_int3472_get_acpi_buffer(struct acpi_device *adev,
+					       char *id);
+int skl_int3472_fill_cldb(struct acpi_device *adev, struct int3472_cldb *cldb);
+int skl_int3472_get_sensor_adev_and_name(struct device *dev,
+					 struct acpi_device **sensor_adev_ret,
+					 const char **name_ret);
+
+int skl_int3472_register_clock(struct int3472_discrete_device *int3472);
+void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472);
+
+int skl_int3472_register_regulator(struct int3472_discrete_device *int3472,
+				   struct acpi_resource_gpio *agpio);
+void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472);
+
+#endif
diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
new file mode 100644
index 000000000..c42c3faa2
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/discrete.c
@@ -0,0 +1,423 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#include <linux/acpi.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/overflow.h>
+#include <linux/platform_device.h>
+#include <linux/uuid.h>
+
+#include "common.h"
+
+/*
+ * 79234640-9e10-4fea-a5c1-b5aa8b19756f
+ * This _DSM GUID returns information about the GPIO lines mapped to a
+ * discrete INT3472 device. Function number 1 returns a count of the GPIO
+ * lines that are mapped. Subsequent functions return 32 bit ints encoding
+ * information about the GPIO line, including its purpose.
+ */
+static const guid_t int3472_gpio_guid =
+	GUID_INIT(0x79234640, 0x9e10, 0x4fea,
+		  0xa5, 0xc1, 0xb5, 0xaa, 0x8b, 0x19, 0x75, 0x6f);
+
+/*
+ * 822ace8f-2814-4174-a56b-5f029fe079ee
+ * This _DSM GUID returns a string from the sensor device, which acts as a
+ * module identifier.
+ */
+static const guid_t cio2_sensor_module_guid =
+	GUID_INIT(0x822ace8f, 0x2814, 0x4174,
+		  0xa5, 0x6b, 0x5f, 0x02, 0x9f, 0xe0, 0x79, 0xee);
+
+/*
+ * Here follows platform specific mapping information that we can pass to
+ * the functions mapping resources to the sensors. Where the sensors have
+ * a power enable pin defined in DSDT we need to provide a supply name so
+ * the sensor drivers can find the regulator. The device name will be derived
+ * from the sensor's ACPI device within the code. Optionally, we can provide a
+ * NULL terminated array of function name mappings to deal with any platform
+ * specific deviations from the documented behaviour of GPIOs.
+ *
+ * Map a GPIO function name to NULL to prevent the driver from mapping that
+ * GPIO at all.
+ */
+
+static const struct int3472_gpio_function_remap ov2680_gpio_function_remaps[] = {
+	{ "reset", NULL },
+	{ "powerdown", "reset" },
+	{ }
+};
+
+static const struct int3472_sensor_config int3472_sensor_configs[] = {
+	/* Lenovo Miix 510-12ISK - OV2680, Front */
+	{ "GNDF140809R", { 0 }, ov2680_gpio_function_remaps },
+	/* Lenovo Miix 510-12ISK - OV5648, Rear */
+	{ "GEFF150023R", REGULATOR_SUPPLY("avdd", NULL), NULL },
+	/* Surface Go 1&2 - OV5693, Front */
+	{ "YHCU", REGULATOR_SUPPLY("avdd", NULL), NULL },
+};
+
+static const struct int3472_sensor_config *
+skl_int3472_get_sensor_module_config(struct int3472_discrete_device *int3472)
+{
+	union acpi_object *obj;
+	unsigned int i;
+
+	obj = acpi_evaluate_dsm_typed(int3472->sensor->handle,
+				      &cio2_sensor_module_guid, 0x00,
+				      0x01, NULL, ACPI_TYPE_STRING);
+
+	if (!obj) {
+		dev_err(int3472->dev,
+			"Failed to get sensor module string from _DSM\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	if (obj->string.type != ACPI_TYPE_STRING) {
+		dev_err(int3472->dev,
+			"Sensor _DSM returned a non-string value\n");
+
+		ACPI_FREE(obj);
+		return ERR_PTR(-EINVAL);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(int3472_sensor_configs); i++) {
+		if (!strcmp(int3472_sensor_configs[i].sensor_module_name,
+			    obj->string.pointer))
+			break;
+	}
+
+	ACPI_FREE(obj);
+
+	if (i >= ARRAY_SIZE(int3472_sensor_configs))
+		return ERR_PTR(-EINVAL);
+
+	return &int3472_sensor_configs[i];
+}
+
+static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int3472,
+					  struct acpi_resource_gpio *agpio,
+					  const char *func, u32 polarity)
+{
+	const struct int3472_sensor_config *sensor_config;
+	char *path = agpio->resource_source.string_ptr;
+	struct gpiod_lookup *table_entry;
+	struct acpi_device *adev;
+	acpi_handle handle;
+	acpi_status status;
+
+	if (int3472->n_sensor_gpios >= INT3472_MAX_SENSOR_GPIOS) {
+		dev_warn(int3472->dev, "Too many GPIOs mapped\n");
+		return -EINVAL;
+	}
+
+	sensor_config = int3472->sensor_config;
+	if (!IS_ERR(sensor_config) && sensor_config->function_maps) {
+		const struct int3472_gpio_function_remap *remap;
+
+		for (remap = sensor_config->function_maps; remap->documented; remap++) {
+			if (!strcmp(func, remap->documented)) {
+				func = remap->actual;
+				break;
+			}
+		}
+	}
+
+	/* Functions mapped to NULL should not be mapped to the sensor */
+	if (!func)
+		return 0;
+
+	status = acpi_get_handle(NULL, path, &handle);
+	if (ACPI_FAILURE(status))
+		return -EINVAL;
+
+	adev = acpi_fetch_acpi_dev(handle);
+	if (!adev)
+		return -ENODEV;
+
+	table_entry = &int3472->gpios.table[int3472->n_sensor_gpios];
+	table_entry->key = acpi_dev_name(adev);
+	table_entry->chip_hwnum = agpio->pin_table[0];
+	table_entry->con_id = func;
+	table_entry->idx = 0;
+	table_entry->flags = polarity;
+
+	int3472->n_sensor_gpios++;
+
+	return 0;
+}
+
+static int skl_int3472_map_gpio_to_clk(struct int3472_discrete_device *int3472,
+				       struct acpi_resource_gpio *agpio, u8 type)
+{
+	char *path = agpio->resource_source.string_ptr;
+	u16 pin = agpio->pin_table[0];
+	struct gpio_desc *gpio;
+
+	switch (type) {
+	case INT3472_GPIO_TYPE_CLK_ENABLE:
+		gpio = acpi_get_and_request_gpiod(path, pin, "int3472,clk-enable");
+		if (IS_ERR(gpio))
+			return (PTR_ERR(gpio));
+
+		int3472->clock.ena_gpio = gpio;
+		/* Ensure the pin is in output mode and non-active state */
+		gpiod_direction_output(int3472->clock.ena_gpio, 0);
+		break;
+	case INT3472_GPIO_TYPE_PRIVACY_LED:
+		gpio = acpi_get_and_request_gpiod(path, pin, "int3472,privacy-led");
+		if (IS_ERR(gpio))
+			return (PTR_ERR(gpio));
+
+		int3472->clock.led_gpio = gpio;
+		/* Ensure the pin is in output mode and non-active state */
+		gpiod_direction_output(int3472->clock.led_gpio, 0);
+		break;
+	default:
+		dev_err(int3472->dev, "Invalid GPIO type 0x%02x for clock\n", type);
+		break;
+	}
+
+	return 0;
+}
+
+/**
+ * skl_int3472_handle_gpio_resources: Map PMIC resources to consuming sensor
+ * @ares: A pointer to a &struct acpi_resource
+ * @data: A pointer to a &struct int3472_discrete_device
+ *
+ * This function handles GPIO resources that are against an INT3472
+ * ACPI device, by checking the value of the corresponding _DSM entry.
+ * This will return a 32bit int, where the lowest byte represents the
+ * function of the GPIO pin:
+ *
+ * 0x00 Reset
+ * 0x01 Power down
+ * 0x0b Power enable
+ * 0x0c Clock enable
+ * 0x0d Privacy LED
+ *
+ * There are some known platform specific quirks where that does not quite
+ * hold up; for example where a pin with type 0x01 (Power down) is mapped to
+ * a sensor pin that performs a reset function or entries in _CRS and _DSM that
+ * do not actually correspond to a physical connection. These will be handled
+ * by the mapping sub-functions.
+ *
+ * GPIOs will either be mapped directly to the sensor device or else used
+ * to create clocks and regulators via the usual frameworks.
+ *
+ * Return:
+ * * 1		- To continue the loop
+ * * 0		- When all resources found are handled properly.
+ * * -EINVAL	- If the resource is not a GPIO IO resource
+ * * -ENODEV	- If the resource has no corresponding _DSM entry
+ * * -Other	- Errors propagated from one of the sub-functions.
+ */
+static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares,
+					     void *data)
+{
+	struct int3472_discrete_device *int3472 = data;
+	struct acpi_resource_gpio *agpio;
+	union acpi_object *obj;
+	const char *err_msg;
+	int ret;
+	u8 type;
+
+	if (!acpi_gpio_get_io_resource(ares, &agpio))
+		return 1;
+
+	/*
+	 * ngpios + 2 because the index of this _DSM function is 1-based and
+	 * the first function is just a count.
+	 */
+	obj = acpi_evaluate_dsm_typed(int3472->adev->handle,
+				      &int3472_gpio_guid, 0x00,
+				      int3472->ngpios + 2,
+				      NULL, ACPI_TYPE_INTEGER);
+
+	if (!obj) {
+		dev_warn(int3472->dev, "No _DSM entry for GPIO pin %u\n",
+			 agpio->pin_table[0]);
+		return 1;
+	}
+
+	type = obj->integer.value & 0xff;
+
+	switch (type) {
+	case INT3472_GPIO_TYPE_RESET:
+		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, "reset",
+						     GPIO_ACTIVE_LOW);
+		if (ret)
+			err_msg = "Failed to map reset pin to sensor\n";
+
+		break;
+	case INT3472_GPIO_TYPE_POWERDOWN:
+		ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, "powerdown",
+						     GPIO_ACTIVE_LOW);
+		if (ret)
+			err_msg = "Failed to map powerdown pin to sensor\n";
+
+		break;
+	case INT3472_GPIO_TYPE_CLK_ENABLE:
+	case INT3472_GPIO_TYPE_PRIVACY_LED:
+		ret = skl_int3472_map_gpio_to_clk(int3472, agpio, type);
+		if (ret)
+			err_msg = "Failed to map GPIO to clock\n";
+
+		break;
+	case INT3472_GPIO_TYPE_POWER_ENABLE:
+		ret = skl_int3472_register_regulator(int3472, agpio);
+		if (ret)
+			err_msg = "Failed to map regulator to sensor\n";
+
+		break;
+	default:
+		dev_warn(int3472->dev,
+			 "GPIO type 0x%02x unknown; the sensor may not work\n",
+			 type);
+		ret = 1;
+		break;
+	}
+
+	int3472->ngpios++;
+	ACPI_FREE(obj);
+
+	if (ret < 0)
+		return dev_err_probe(int3472->dev, ret, err_msg);
+
+	return ret;
+}
+
+static int skl_int3472_parse_crs(struct int3472_discrete_device *int3472)
+{
+	LIST_HEAD(resource_list);
+	int ret;
+
+	/*
+	 * No error check, because not having a sensor config is not necessarily
+	 * a failure mode.
+	 */
+	int3472->sensor_config = skl_int3472_get_sensor_module_config(int3472);
+
+	ret = acpi_dev_get_resources(int3472->adev, &resource_list,
+				     skl_int3472_handle_gpio_resources,
+				     int3472);
+	if (ret < 0)
+		return ret;
+
+	acpi_dev_free_resource_list(&resource_list);
+
+	/*
+	 * If we find no clock enable GPIO pin then the privacy LED won't work.
+	 * We've never seen that situation, but it's possible. Warn the user so
+	 * it's clear what's happened.
+	 */
+	if (int3472->clock.ena_gpio) {
+		ret = skl_int3472_register_clock(int3472);
+		if (ret)
+			return ret;
+	} else {
+		if (int3472->clock.led_gpio)
+			dev_warn(int3472->dev,
+				 "No clk GPIO. The privacy LED won't work\n");
+	}
+
+	int3472->gpios.dev_id = int3472->sensor_name;
+	gpiod_add_lookup_table(&int3472->gpios);
+
+	return 0;
+}
+
+static int skl_int3472_discrete_remove(struct platform_device *pdev)
+{
+	struct int3472_discrete_device *int3472 = platform_get_drvdata(pdev);
+
+	gpiod_remove_lookup_table(&int3472->gpios);
+
+	if (int3472->clock.cl)
+		skl_int3472_unregister_clock(int3472);
+
+	gpiod_put(int3472->clock.ena_gpio);
+	gpiod_put(int3472->clock.led_gpio);
+
+	skl_int3472_unregister_regulator(int3472);
+
+	return 0;
+}
+
+static int skl_int3472_discrete_probe(struct platform_device *pdev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
+	struct int3472_discrete_device *int3472;
+	struct int3472_cldb cldb;
+	int ret;
+
+	ret = skl_int3472_fill_cldb(adev, &cldb);
+	if (ret) {
+		dev_err(&pdev->dev, "Couldn't fill CLDB structure\n");
+		return ret;
+	}
+
+	if (cldb.control_logic_type != 1) {
+		dev_err(&pdev->dev, "Unsupported control logic type %u\n",
+			cldb.control_logic_type);
+		return -EINVAL;
+	}
+
+	/* Max num GPIOs we've seen plus a terminator */
+	int3472 = devm_kzalloc(&pdev->dev, struct_size(int3472, gpios.table,
+			       INT3472_MAX_SENSOR_GPIOS + 1), GFP_KERNEL);
+	if (!int3472)
+		return -ENOMEM;
+
+	int3472->adev = adev;
+	int3472->dev = &pdev->dev;
+	platform_set_drvdata(pdev, int3472);
+
+	ret = skl_int3472_get_sensor_adev_and_name(&pdev->dev, &int3472->sensor,
+						   &int3472->sensor_name);
+	if (ret)
+		return ret;
+
+	/*
+	 * Initialising this list means we can call gpiod_remove_lookup_table()
+	 * in failure paths without issue.
+	 */
+	INIT_LIST_HEAD(&int3472->gpios.list);
+
+	ret = skl_int3472_parse_crs(int3472);
+	if (ret) {
+		skl_int3472_discrete_remove(pdev);
+		return ret;
+	}
+
+	acpi_dev_clear_dependencies(adev);
+	return 0;
+}
+
+static const struct acpi_device_id int3472_device_id[] = {
+	{ "INT3472", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, int3472_device_id);
+
+static struct platform_driver int3472_discrete = {
+	.driver = {
+		.name = "int3472-discrete",
+		.acpi_match_table = int3472_device_id,
+	},
+	.probe = skl_int3472_discrete_probe,
+	.remove = skl_int3472_discrete_remove,
+};
+module_platform_driver(int3472_discrete);
+
+MODULE_DESCRIPTION("Intel SkyLake INT3472 ACPI Discrete Device Driver");
+MODULE_AUTHOR("Daniel Scally <djrscally@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/platform/x86/intel/int3472/tps68470.c b/drivers/platform/x86/intel/int3472/tps68470.c
new file mode 100644
index 000000000..5b8d1a962
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/tps68470.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Author: Dan Scally <djrscally@gmail.com> */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps68470.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/tps68470.h>
+#include <linux/regmap.h>
+#include <linux/string.h>
+
+#include "common.h"
+#include "tps68470.h"
+
+#define DESIGNED_FOR_CHROMEOS		1
+#define DESIGNED_FOR_WINDOWS		2
+
+#define TPS68470_WIN_MFD_CELL_COUNT	3
+
+static const struct mfd_cell tps68470_cros[] = {
+	{ .name = "tps68470-gpio" },
+	{ .name = "tps68470_pmic_opregion" },
+};
+
+static const struct regmap_config tps68470_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = TPS68470_REG_MAX,
+};
+
+static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
+{
+	unsigned int version;
+	int ret;
+
+	/* Force software reset */
+	ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
+	if (ret) {
+		dev_err(dev, "Failed to read revision register: %d\n", ret);
+		return ret;
+	}
+
+	dev_info(dev, "TPS68470 REVID: 0x%02x\n", version);
+
+	return 0;
+}
+
+/** skl_int3472_tps68470_calc_type: Check what platform a device is designed for
+ * @adev: A pointer to a &struct acpi_device
+ *
+ * Check CLDB buffer against the PMIC's adev. If present, then we check
+ * the value of control_logic_type field and follow one of the
+ * following scenarios:
+ *
+ *	1. No CLDB - likely ACPI tables designed for ChromeOS. We
+ *	create platform devices for the GPIOs and OpRegion drivers.
+ *
+ *	2. CLDB, with control_logic_type = 2 - probably ACPI tables
+ *	made for Windows 2-in-1 platforms. Register pdevs for GPIO,
+ *	Clock and Regulator drivers to bind to.
+ *
+ *	3. Any other value in control_logic_type, we should never have
+ *	gotten to this point; fail probe and return.
+ *
+ * Return:
+ * * 1		Device intended for ChromeOS
+ * * 2		Device intended for Windows
+ * * -EINVAL	Where @adev has an object named CLDB but it does not conform to
+ *		our expectations
+ */
+static int skl_int3472_tps68470_calc_type(struct acpi_device *adev)
+{
+	struct int3472_cldb cldb = { 0 };
+	int ret;
+
+	/*
+	 * A CLDB buffer that exists, but which does not match our expectations
+	 * should trigger an error so we don't blindly continue.
+	 */
+	ret = skl_int3472_fill_cldb(adev, &cldb);
+	if (ret && ret != -ENODEV)
+		return ret;
+
+	if (ret)
+		return DESIGNED_FOR_CHROMEOS;
+
+	if (cldb.control_logic_type != 2)
+		return -EINVAL;
+
+	return DESIGNED_FOR_WINDOWS;
+}
+
+/*
+ * Return the size of the flexible array member, because we'll need that later
+ * on to pass .pdata_size to cells.
+ */
+static int
+skl_int3472_fill_clk_pdata(struct device *dev, struct tps68470_clk_platform_data **clk_pdata)
+{
+	struct acpi_device *adev = ACPI_COMPANION(dev);
+	struct acpi_device *consumer;
+	unsigned int n_consumers = 0;
+	const char *sensor_name;
+	unsigned int i = 0;
+
+	for_each_acpi_consumer_dev(adev, consumer)
+		n_consumers++;
+
+	if (!n_consumers) {
+		dev_err(dev, "INT3472 seems to have no dependents\n");
+		return -ENODEV;
+	}
+
+	*clk_pdata = devm_kzalloc(dev, struct_size(*clk_pdata, consumers, n_consumers),
+				  GFP_KERNEL);
+	if (!*clk_pdata)
+		return -ENOMEM;
+
+	(*clk_pdata)->n_consumers = n_consumers;
+	i = 0;
+
+	for_each_acpi_consumer_dev(adev, consumer) {
+		sensor_name = devm_kasprintf(dev, GFP_KERNEL, I2C_DEV_NAME_FORMAT,
+					     acpi_dev_name(consumer));
+		if (!sensor_name) {
+			acpi_dev_put(consumer);
+			return -ENOMEM;
+		}
+
+		(*clk_pdata)->consumers[i].consumer_dev_name = sensor_name;
+		i++;
+	}
+
+	return n_consumers;
+}
+
+static int skl_int3472_tps68470_probe(struct i2c_client *client)
+{
+	struct acpi_device *adev = ACPI_COMPANION(&client->dev);
+	const struct int3472_tps68470_board_data *board_data;
+	struct tps68470_clk_platform_data *clk_pdata;
+	struct mfd_cell *cells;
+	struct regmap *regmap;
+	int n_consumers;
+	int device_type;
+	int ret;
+	int i;
+
+	n_consumers = skl_int3472_fill_clk_pdata(&client->dev, &clk_pdata);
+	if (n_consumers < 0)
+		return n_consumers;
+
+	regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Failed to create regmap: %ld\n", PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	i2c_set_clientdata(client, regmap);
+
+	ret = tps68470_chip_init(&client->dev, regmap);
+	if (ret < 0) {
+		dev_err(&client->dev, "TPS68470 init error %d\n", ret);
+		return ret;
+	}
+
+	device_type = skl_int3472_tps68470_calc_type(adev);
+	switch (device_type) {
+	case DESIGNED_FOR_WINDOWS:
+		board_data = int3472_tps68470_get_board_data(dev_name(&client->dev));
+		if (!board_data)
+			return dev_err_probe(&client->dev, -ENODEV, "No board-data found for this model\n");
+
+		cells = kcalloc(TPS68470_WIN_MFD_CELL_COUNT, sizeof(*cells), GFP_KERNEL);
+		if (!cells)
+			return -ENOMEM;
+
+		/*
+		 * The order of the cells matters here! The clk must be first
+		 * because the regulator depends on it. The gpios must be last,
+		 * acpi_gpiochip_add() calls acpi_dev_clear_dependencies() and
+		 * the clk + regulators must be ready when this happens.
+		 */
+		cells[0].name = "tps68470-clk";
+		cells[0].platform_data = clk_pdata;
+		cells[0].pdata_size = struct_size(clk_pdata, consumers, n_consumers);
+		cells[1].name = "tps68470-regulator";
+		cells[1].platform_data = (void *)board_data->tps68470_regulator_pdata;
+		cells[1].pdata_size = sizeof(struct tps68470_regulator_platform_data);
+		cells[2].name = "tps68470-gpio";
+
+		for (i = 0; i < board_data->n_gpiod_lookups; i++)
+			gpiod_add_lookup_table(board_data->tps68470_gpio_lookup_tables[i]);
+
+		ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
+					   cells, TPS68470_WIN_MFD_CELL_COUNT,
+					   NULL, 0, NULL);
+		kfree(cells);
+
+		if (ret) {
+			for (i = 0; i < board_data->n_gpiod_lookups; i++)
+				gpiod_remove_lookup_table(board_data->tps68470_gpio_lookup_tables[i]);
+		}
+
+		break;
+	case DESIGNED_FOR_CHROMEOS:
+		ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_NONE,
+					   tps68470_cros, ARRAY_SIZE(tps68470_cros),
+					   NULL, 0, NULL);
+		break;
+	default:
+		dev_err(&client->dev, "Failed to add MFD devices\n");
+		return device_type;
+	}
+
+	/*
+	 * No acpi_dev_clear_dependencies() here, since the acpi_gpiochip_add()
+	 * for the GPIO cell already does this.
+	 */
+
+	return ret;
+}
+
+static void skl_int3472_tps68470_remove(struct i2c_client *client)
+{
+	const struct int3472_tps68470_board_data *board_data;
+	int i;
+
+	board_data = int3472_tps68470_get_board_data(dev_name(&client->dev));
+	if (board_data) {
+		for (i = 0; i < board_data->n_gpiod_lookups; i++)
+			gpiod_remove_lookup_table(board_data->tps68470_gpio_lookup_tables[i]);
+	}
+}
+
+static const struct acpi_device_id int3472_device_id[] = {
+	{ "INT3472", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, int3472_device_id);
+
+static struct i2c_driver int3472_tps68470 = {
+	.driver = {
+		.name = "int3472-tps68470",
+		.acpi_match_table = int3472_device_id,
+	},
+	.probe_new = skl_int3472_tps68470_probe,
+	.remove = skl_int3472_tps68470_remove,
+};
+module_i2c_driver(int3472_tps68470);
+
+MODULE_DESCRIPTION("Intel SkyLake INT3472 ACPI TPS68470 Device Driver");
+MODULE_AUTHOR("Daniel Scally <djrscally@gmail.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_SOFTDEP("pre: clk-tps68470 tps68470-regulator");
diff --git a/drivers/platform/x86/intel/int3472/tps68470.h b/drivers/platform/x86/intel/int3472/tps68470.h
new file mode 100644
index 000000000..35915e701
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/tps68470.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * TI TPS68470 PMIC platform data definition.
+ *
+ * Copyright (c) 2021 Red Hat Inc.
+ *
+ * Red Hat authors:
+ * Hans de Goede <hdegoede@redhat.com>
+ */
+
+#ifndef _INTEL_SKL_INT3472_TPS68470_H
+#define _INTEL_SKL_INT3472_TPS68470_H
+
+struct gpiod_lookup_table;
+struct tps68470_regulator_platform_data;
+
+struct int3472_tps68470_board_data {
+	const char *dev_name;
+	const struct tps68470_regulator_platform_data *tps68470_regulator_pdata;
+	unsigned int n_gpiod_lookups;
+	struct gpiod_lookup_table *tps68470_gpio_lookup_tables[];
+};
+
+const struct int3472_tps68470_board_data *int3472_tps68470_get_board_data(const char *dev_name);
+
+#endif
diff --git a/drivers/platform/x86/intel/int3472/tps68470_board_data.c b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
new file mode 100644
index 000000000..322237e05
--- /dev/null
+++ b/drivers/platform/x86/intel/int3472/tps68470_board_data.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TI TPS68470 PMIC platform data definition.
+ *
+ * Copyright (c) 2021 Dan Scally <djrscally@gmail.com>
+ * Copyright (c) 2021 Red Hat Inc.
+ *
+ * Red Hat authors:
+ * Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/dmi.h>
+#include <linux/gpio/machine.h>
+#include <linux/platform_data/tps68470.h>
+#include <linux/regulator/machine.h>
+#include "tps68470.h"
+
+static struct regulator_consumer_supply int347a_core_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dvdd", "i2c-INT347A:00"),
+};
+
+static struct regulator_consumer_supply int347a_ana_consumer_supplies[] = {
+	REGULATOR_SUPPLY("avdd", "i2c-INT347A:00"),
+};
+
+static struct regulator_consumer_supply int347a_vcm_consumer_supplies[] = {
+	REGULATOR_SUPPLY("vdd", "i2c-INT347A:00-VCM"),
+};
+
+static struct regulator_consumer_supply int347a_vsio_consumer_supplies[] = {
+	REGULATOR_SUPPLY("dovdd", "i2c-INT347A:00"),
+	REGULATOR_SUPPLY("vsio", "i2c-INT347A:00-VCM"),
+	REGULATOR_SUPPLY("vddd", "i2c-INT347E:00"),
+};
+
+static struct regulator_consumer_supply int347a_aux1_consumer_supplies[] = {
+	REGULATOR_SUPPLY("vdda", "i2c-INT347E:00"),
+};
+
+static struct regulator_consumer_supply int347a_aux2_consumer_supplies[] = {
+	REGULATOR_SUPPLY("vdddo", "i2c-INT347E:00"),
+};
+
+static const struct regulator_init_data surface_go_tps68470_core_reg_init_data = {
+	.constraints = {
+		.min_uV = 1200000,
+		.max_uV = 1200000,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(int347a_core_consumer_supplies),
+	.consumer_supplies = int347a_core_consumer_supplies,
+};
+
+static const struct regulator_init_data surface_go_tps68470_ana_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(int347a_ana_consumer_supplies),
+	.consumer_supplies = int347a_ana_consumer_supplies,
+};
+
+static const struct regulator_init_data surface_go_tps68470_vcm_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(int347a_vcm_consumer_supplies),
+	.consumer_supplies = int347a_vcm_consumer_supplies,
+};
+
+/* Ensure the always-on VIO regulator has the same voltage as VSIO */
+static const struct regulator_init_data surface_go_tps68470_vio_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = true,
+		.always_on = true,
+	},
+};
+
+static const struct regulator_init_data surface_go_tps68470_vsio_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = true,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(int347a_vsio_consumer_supplies),
+	.consumer_supplies = int347a_vsio_consumer_supplies,
+};
+
+static const struct regulator_init_data surface_go_tps68470_aux1_reg_init_data = {
+	.constraints = {
+		.min_uV = 2815200,
+		.max_uV = 2815200,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(int347a_aux1_consumer_supplies),
+	.consumer_supplies = int347a_aux1_consumer_supplies,
+};
+
+static const struct regulator_init_data surface_go_tps68470_aux2_reg_init_data = {
+	.constraints = {
+		.min_uV = 1800600,
+		.max_uV = 1800600,
+		.apply_uV = 1,
+		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+	},
+	.num_consumer_supplies = ARRAY_SIZE(int347a_aux2_consumer_supplies),
+	.consumer_supplies = int347a_aux2_consumer_supplies,
+};
+
+static const struct tps68470_regulator_platform_data surface_go_tps68470_pdata = {
+	.reg_init_data = {
+		[TPS68470_CORE] = &surface_go_tps68470_core_reg_init_data,
+		[TPS68470_ANA]  = &surface_go_tps68470_ana_reg_init_data,
+		[TPS68470_VCM]  = &surface_go_tps68470_vcm_reg_init_data,
+		[TPS68470_VIO] = &surface_go_tps68470_vio_reg_init_data,
+		[TPS68470_VSIO] = &surface_go_tps68470_vsio_reg_init_data,
+		[TPS68470_AUX1] = &surface_go_tps68470_aux1_reg_init_data,
+		[TPS68470_AUX2] = &surface_go_tps68470_aux2_reg_init_data,
+	},
+};
+
+static struct gpiod_lookup_table surface_go_int347a_gpios = {
+	.dev_id = "i2c-INT347A:00",
+	.table = {
+		GPIO_LOOKUP("tps68470-gpio", 9, "reset", GPIO_ACTIVE_LOW),
+		GPIO_LOOKUP("tps68470-gpio", 7, "powerdown", GPIO_ACTIVE_LOW),
+		{ }
+	}
+};
+
+static struct gpiod_lookup_table surface_go_int347e_gpios = {
+	.dev_id = "i2c-INT347E:00",
+	.table = {
+		GPIO_LOOKUP("tps68470-gpio", 5, "enable", GPIO_ACTIVE_HIGH),
+		{ }
+	}
+};
+
+static const struct int3472_tps68470_board_data surface_go_tps68470_board_data = {
+	.dev_name = "i2c-INT3472:05",
+	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
+	.n_gpiod_lookups = 2,
+	.tps68470_gpio_lookup_tables = {
+		&surface_go_int347a_gpios,
+		&surface_go_int347e_gpios,
+	},
+};
+
+static const struct int3472_tps68470_board_data surface_go3_tps68470_board_data = {
+	.dev_name = "i2c-INT3472:01",
+	.tps68470_regulator_pdata = &surface_go_tps68470_pdata,
+	.n_gpiod_lookups = 2,
+	.tps68470_gpio_lookup_tables = {
+		&surface_go_int347a_gpios,
+		&surface_go_int347e_gpios,
+	},
+};
+
+static const struct dmi_system_id int3472_tps68470_board_data_table[] = {
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Go"),
+		},
+		.driver_data = (void *)&surface_go_tps68470_board_data,
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Go 2"),
+		},
+		.driver_data = (void *)&surface_go_tps68470_board_data,
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Go 3"),
+		},
+		.driver_data = (void *)&surface_go3_tps68470_board_data,
+	},
+	{ }
+};
+
+const struct int3472_tps68470_board_data *int3472_tps68470_get_board_data(const char *dev_name)
+{
+	const struct int3472_tps68470_board_data *board_data;
+	const struct dmi_system_id *match;
+
+	for (match = dmi_first_match(int3472_tps68470_board_data_table);
+	     match;
+	     match = dmi_first_match(match + 1)) {
+		board_data = match->driver_data;
+		if (strcmp(board_data->dev_name, dev_name) == 0)
+			return board_data;
+	}
+
+	return NULL;
+}