[PATCH] ARM: dts: imx53-qsrb: Fix suspend/resume

[shawn.guo@freescale.com (Shawn Guo)]

On Thu, Aug 07, 2014 at 03:01:33PM -0300, Fabio Estevam wrote:
> The following error is seen after a suspend/resume cycle on a mx53qsb with a
> MC34708 PMIC:
> 
> root at 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 5169df8be0a432ee ("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.
> 
> Cc: <stable@vger.kernel.org> # 3.16
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

Applied, thanks.