When using devicetree, stuff like i2c_client.name or spi_device.modalias is initialized to the first DT compatible id with the vendor prefix stripped. Since some drivers rely on this in order to differentiate between hardware variants, try to replicate it when using ACPI with DT ids. This also makes it so that the i2c_device_id parameter passed to probe is non-NULL when matching with ACPI and DT ids. Tested using ACPI overlays but there is no actual dependency. This series just extends the PRP0001 feature to be more useful for I2C/SPI. The patches only touches the ACPI-specific parts of the i2c and spi core. Here is an example .dsl for an SPI accelerometer connected to minnowboard max: Device (ACCL) { Name (_ADR, Zero) Name (_HID, "PRP0001") Name (_UID, One) Method (_CRS, 0, Serialized) { Name (RBUF, ResourceTemplate () { SPISerialBus(1, PolarityLow, FourWireMode, 16, ControllerInitiated, 1000000, ClockPolarityLow, ClockPhaseFirst, "\\_SB.SPI1",) GpioInt (Edge, ActiveHigh, Exclusive, PullDown, 0x0000, "\\_SB.GPO2", 0x00, ResourceConsumer, , ) { // Pin list 1 } }) Return (RBUF) } Name (_DSD, Package () { ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package () {"compatible", "st,lis3dh"}, } }) } Credit to Leonard Crestez for the original version of this patch set. Link to v4: http://www.spinics.net/lists/linux-acpi/msg71657.html Changes: * add acpi_set_modalias wrapper to handle fallback to ACPI ID (Mark Brown) Link to v3: http://www.spinics.net/lists/linux-acpi/msg71531.html Changes: * Minor cosmetic/readability improvements (Andy Shevchenko) Link to v2: https://lkml.org/lkml/2016/7/13/392 Changes: * Use appropriate subject prefix for each subsystem (Mark Brown) * Use ACPI info as before if getting OF info fails (Mark Brown) * Minor cosmetic/readability improvements (Rafael J. Wysocki) Link to v1: https://www.spinics.net/lists/linux-acpi/msg66469.html Changes: * Rebase on after acpi overlays got it. * Change acpi_of_modalias outlen param to size_t * Use {} after else Dan O'Donovan (3): ACPI / bus: Export acpi_of_modalias equiv of of_modalias_node i2c: acpi: Initialize info.type from of_compatible spi: acpi: Initialize modalias from of_compatible drivers/acpi/bus.c | 42 ++++++++++++++++++++++++++++++++++++++++++ drivers/i2c/i2c-core.c | 3 ++- drivers/spi/spi.c | 4 +++- include/acpi/acpi_bus.h | 2 ++ 4 files changed, 49 insertions(+), 2 deletions(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html