• Avinash.H.M's avatar
    OMAP: hwmod: fix the i2c-reset timeout during bootup · 6d3c55fd
    Avinash.H.M authored
    The sequence of _ocp_softreset doesn't work for i2c. The i2c module has a
    special sequence to reset the module. The sequence is
     - Disable the I2C.
     - Write to SOFTRESET bit.
     - Enable the I2C.
     - Poll on the RESETDONE bit.
    The sequence is implemented as a function and the i2c_class is updated with
    the correct 'reset' pointer.  omap_hwmod_softreset function is implemented
    which triggers the softreset by writing into sysconfig register. On following
    this sequence, i2c module resets properly and timeouts are not seen.
    
    Cc: Rajendra Nayak <rnayak@ti.com>
    Cc: Paul Walmsley <paul@pwsan.com>
    Cc: Benoit Cousson <b-cousson@ti.com>
    Cc: Kevin Hilman <khilman@ti.com>
    Signed-off-by: default avatarAvinash.H.M <avinashhm@ti.com>
    [paul@pwsan.com: combined this patch with a patch to remove
     HWMOD_INIT_NO_RESET from the 44xx hwmod flags; change register
     offset conditional code to use the IP block revision; minor code
     cleanup]
    Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
    6d3c55fd
i2c.h 1.73 KB