drivers/platform/x86/intel/int3472/tps68470.c

Source file repositories/reference/linux-study-clean/drivers/platform/x86/intel/int3472/tps68470.c

File Facts

System
Linux kernel
Corpus path
drivers/platform/x86/intel/int3472/tps68470.c
Extension
.c
Size
7388 bytes
Lines
267
Domain
Driver Families
Bucket
drivers/platform
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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;

	if (!adev)
		return -ENODEV;

	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 = kzalloc_objs(*cells, TPS68470_WIN_MFD_CELL_COUNT);
		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";
		cells[2].swnode = board_data->tps68470_gpio_swnode;

		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;

Annotation

Implementation Notes