drivers/input/misc/atlas_btns.c

Source file repositories/reference/linux-study-clean/drivers/input/misc/atlas_btns.c

File Facts

System
Linux kernel
Corpus path
drivers/input/misc/atlas_btns.c
Extension
.c
Size
3756 bytes
Lines
148
Domain
Driver Families
Bucket
drivers/input
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 (i < 9) {
			atlas_keymap[i] = KEY_F1 + i;
			__set_bit(KEY_F1 + i, input_dev->keybit);
		} else
			atlas_keymap[i] = KEY_RESERVED;
	}

	err = input_register_device(input_dev);
	if (err) {
		pr_err("couldn't register input device\n");
		input_free_device(input_dev);
		return err;
	}

	/* hookup button handler */
	status = acpi_install_address_space_handler(device->handle,
				0x81, &acpi_atlas_button_handler,
				&acpi_atlas_button_setup, device);
	if (ACPI_FAILURE(status)) {
		pr_err("error installing addr spc handler\n");
		input_unregister_device(input_dev);
		err = -EINVAL;
	}

	return err;
}

static void atlas_acpi_button_remove(struct platform_device *pdev)
{
	struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
	acpi_status status;

	status = acpi_remove_address_space_handler(device->handle,
				0x81, &acpi_atlas_button_handler);
	if (ACPI_FAILURE(status))
		pr_err("error removing addr spc handler\n");

	input_unregister_device(input_dev);
}

static const struct acpi_device_id atlas_device_ids[] = {
	{"ASIM0000", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, atlas_device_ids);

static struct platform_driver atlas_acpi_driver = {
	.probe = atlas_acpi_button_probe,
	.remove = atlas_acpi_button_remove,
	.driver = {
		.name = ACPI_ATLAS_NAME,
		.acpi_match_table = atlas_device_ids,
	},
};
module_platform_driver(atlas_acpi_driver);

MODULE_AUTHOR("Jaya Kumar");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Atlas button driver");

Annotation

Implementation Notes