8972 2016-01-21 19:10:24 +0000 failed to add I2C device MSFT8000:00 from ACPI on MinnowBoard Max 2016-08-10 23:01:02 +0000 1 1 12 Hardware Platforms MinnowBoard MAX Firmware minnowboard-firmware unspecified MinnowBoard Max x86_64 RESOLVED FIXED Undecided normal --- 1 california.l.sullivan tim.he david.wei mike.wu --- --- No (bug/feature does not impact docs) oldest_to_newest 58087 0 california.l.sullivan 2016-01-21 19:10:24 +0000 The following error message occurs on a 4.4 Linux kernel: [ 28.836018] i2c i2c-7: Invalid 7-bit I2C address 0xff [ 28.908036] i2c i2c-7: failed to add I2C device MSFT8000:00 from ACPI The reason this happens is because the 4.4 kernel adds an i2c_check_addr_validty call to the acpi_i2c_add_device function. This call returns a failure because that device is defined as having a 7 bit address and an address 0x00ff (which is 8 bits) in the ACPI tables: Name (_HID, "MSFT8000") // _HID: Hardware ID Name (_CID, "MSFT8000") // _CID: Compatible ID Name (_UID, One) // _UID: Unique ID Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings { ... I2cSerialBus (0x00FF, ControllerInitiated, 0x00061A80, AddressingMode7Bit, "\\_SB.I2C6", 0x00, ResourceConsumer, , ) ... 59615 1 tim.he 2016-03-02 06:50:59 +0000 Cal, I'd like to verify this bug, could you please tell me where to download the new Yocto image with 4.4 Linux kernel? thanks. 59890 2 david.wei 2016-03-11 02:58:55 +0000 Tim, If you still do not know how to verify it, could you attach a test image for California to help test? Let's work together to make this fix available on V0.91 firmware release. 60372 3 tim.he 2016-03-24 07:39:00 +0000 Fix this issue on next release (0.91). 65049 4 california.l.sullivan 2016-08-10 23:01:02 +0000 Confirmed fixed. If anyone still sees this bug, please update your firmware to the latest version.