• Fabio Estevam's avatar
    ARM: dts: imx53-qsrb: Fix suspend/resume · be35ff0f
    Fabio Estevam authored
    commit 090727b8 upstream.
    
    The following error is seen after a suspend/resume cycle on a mx53qsb with a
    MC34708 PMIC:
    
    root@freescale /$ echo mem > /sys/power/state
    [   32.630592] PM: Syncing filesystems ... done.
    [   32.643924] Freezing user space processes ... (elapsed 0.001 seconds) done.
    [   32.652384] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
    [   32.679156] PM: suspend of devices complete after 13.113 msecs
    [   32.685128] PM: suspend devices took 0.030 seconds
    [   32.696109] PM: late suspend of devices complete after 6.133 msecs
    [   33.313032] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   33.322009] PM: noirq suspend of devices complete after 619.667 msecs
    [   33.328544] Disabling non-boot CPUs ...
    [   33.335031] PM: noirq resume of devices complete after 2.352 msecs
    [   33.842940] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   33.976095] [sched_delayed] sched: RT throttling activated
    [   33.984804] PM: early resume of devices complete after 642.642 msecs
    [   34.352954] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   34.862910] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   34.996595] PM: resume of devices complete after 1005.367 msecs
    [   35.372925] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   35.882911] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   35.955707] PM: resume devices took 1.970 seconds
    [   35.960445] Restarting tasks ... done.
    [   35.993386] fec 63fec000.ethernet eth0: Link is Down
    [   36.392980] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   36.902908] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   36.953036] ata1: SATA link down (SStatus 0 SControl 300)
    [   37.412922] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   37.922906] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   37.993379] fec 63fec000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
    [   38.432938] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   38.942920] mc13xxx 0-0008: Failed to read IRQ status: -110
    [   39.452933] mc13xxx 0-0008: Failed to read IRQ status: -110
    
    (flood of this error message continues forever)
    
    Commit 5169df8b ("ARM: dts: i.MX53: add support for MCIMX53-START-R")
    missed to configure the IOMUX for the PMIC IRQ pin.
    
    Configure the PMIC IRQ pin so that the suspend/resume sequence behaves cleanly
    as expected.
    Signed-off-by: default avatarFabio Estevam <fabio.estevam@freescale.com>
    Signed-off-by: default avatarShawn Guo <shawn.guo@freescale.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    be35ff0f
imx53-qsrb.dts 3.54 KB