• Tim Harvey's avatar
    imx: mx6: add get_cpu_speed_grade_hz func to return MHz speed grade from OTP · 9b9449c3
    Tim Harvey authored
    
    
    The IMX6 has four different speed grades determined by eFUSE SPEED_GRADING
    indicated by OCOTP_CFG3[17:16] which is at 0x440 in the Fusemap Description
    Table. Return this frequency so that it can be used elsewhere.
    
    Note that the IMX6SDLRM and the IMX6SXRM do not indicate this in the
    their Fusemap Description Table however Freescale has confirmed that these
    eFUSE bits match the description within the IMX6DQRM and that they will
    be added to the next revision of the respective reference manuals.
    
    These have been tested with IMX6 Quad/Solo/Dual-light 800Mhz and 1GHz grades.
    Signed-off-by: default avatarTim Harvey <tharvey@gateworks.com>
    9b9449c3
sys_proto.h 1.17 KB