• Sascha Hauer's avatar
    ARM: i.MX35: enable MAX clock · 5dc2eb7d
    Sascha Hauer authored
    The i.MX35 has two bits per clock gate which are decoded as follows:
          0b00 -> clock off
          0b01 -> clock is on in run mode, off in wait/doze
          0b10 -> clock is on in run/wait mode, off in doze
          0b11 -> clock is always on
    
    The reset value for the MAX clock is 0b10.
    
    The MAX clock is needed by the SoC, yet unused in the Kernel, so the
    common clock framework will disable it during late init time. It will
    only disable clocks though which it detects as being turned on. This
    detection is made depending on the lower bit of the gate. If the reset
    value has been altered by the bootloader to 0b11 the clock framework
    will detect the clock as turned on, yet unused, hence it will turn it
    off and the system locks up.
    
    This patch turns the MAX clock on unconditionally making the Kernel
    independent of the bootloader.
    Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
    5dc2eb7d
clk-imx35.c 13.7 KB