• Hans de Goede's avatar
    iio: accel: mxc6255: Fix chip-id check · 1696566f
    Hans de Goede authored
    The initial commit adding support for the mxc6225 assumed the
    mxc6225 has a chip-id of 0xe5 based on testing on a single Allwinner
    A23 tablet with a mxc6225. Testing on a bunch of other Allwinner
    tablets have shown that the chip-id for the mxc6225 is not constant.
    A datasheet for the MXC6255 which I've found online says that bits
    7 and 6 of the chip-id register are undefined (for the mxc6255), testing
    on 5 different tablets with a mxc6225 has found the following ids:
    0x25, 0x45, 0x65, 0x85, 0xe5. So it seems that for the mxc6225 bits
    7, 6 and 5 of the chip-id register are undefined.
    This commit adjusts the chip-id check so that the mxc6255 driver
    properly recognizes the mxc6225 in all these tablets.
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>