Commit 877c80df authored by Sakari Ailus's avatar Sakari Ailus Committed by Greg Kroah-Hartman
Browse files

usb: ljca: Improve ACPI hardware ID documentation 



Document the differences between the LJCA client device ACPI hardware IDs,
including the USBIO IDs used for LJCA devices.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarHans de Goede <hansg@kernel.org>
Link: https://lore.kernel.org/r/20251010055625.4147844-2-sakari.ailus@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9f0b086c

drivers/usb/misc/usb-ljca.c

+24 −13
Original line number Diff line number Diff line
@@ -164,28 +164,39 @@ struct ljca_match_ids_walk_data { 
	struct acpi_device *adev;

};



/*

 * ACPI hardware IDs for LJCA client devices.

 *

 * [1] Some BIOS implementations use these IDs for denoting LJCA client devices

 *     even though the IDs have been allocated for USBIO. This isn't a problem

 *     as the usb-ljca driver is probed based on the USB device's vendor and

 *     product IDs and its client drivers are probed based on auxiliary device

 *     names, not these ACPI _HIDs. List of such systems:

 *

 *     Dell Precision 5490

 */

static const struct acpi_device_id ljca_gpio_hids[] = {

	{ "INTC100B" },

	{ "INTC1074" },

	{ "INTC1096" },

	{ "INTC10B5" },

	{ "INTC10D1" },

	{ "INTC100B" }, /* RPL LJCA GPIO */

	{ "INTC1074" }, /* CVF LJCA GPIO */

	{ "INTC1096" }, /* ADL LJCA GPIO */

	{ "INTC10B5" }, /* LNL LJCA GPIO */

	{ "INTC10D1" }, /* MTL (CVF VSC) USBIO GPIO [1] */

	{},

};



static const struct acpi_device_id ljca_i2c_hids[] = {

	{ "INTC100C" },

	{ "INTC1075" },

	{ "INTC1097" },

	{ "INTC10D2" },

	{ "INTC100C" }, /* RPL LJCA I2C */

	{ "INTC1075" }, /* CVF LJCA I2C */

	{ "INTC1097" }, /* ADL LJCA I2C */

	{ "INTC10D2" }, /* MTL (CVF VSC) USBIO I2C [1] */

	{},

};



static const struct acpi_device_id ljca_spi_hids[] = {

	{ "INTC100D" },

	{ "INTC1091" },

	{ "INTC1098" },

	{ "INTC10D3" },

	{ "INTC100D" }, /* RPL LJCA SPI */

	{ "INTC1091" }, /* TGL/ADL LJCA SPI */

	{ "INTC1098" }, /* ADL LJCA SPI */

	{ "INTC10D3" }, /* MTL (CVF VSC) USBIO SPI [1] */

	{},

};