ARM: dts: imx53-qsrb: Fix suspend/resume

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 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>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

diff --git a/arch/arm/boot/dts/imx53-qsrb.dts b/arch/arm/boot/dts/imx53-qsrb.dts
index f1bbf9a32991dd0b35dc9ee5c72cc9eef0d9246c..82d623d05915813761ecaf8c908dbdafac6af42c 100644 (file)
--- a/arch/arm/boot/dts/imx53-qsrb.dts
+++ b/arch/arm/boot/dts/imx53-qsrb.dts
@@ -28,6 +28,12 @@
                                MX53_PAD_CSI0_DAT9__I2C1_SCL      0x400001ec
                        >;
                };
+
+               pinctrl_pmic: pmicgrp {
+                       fsl,pins = <
+                               MX53_PAD_CSI0_DAT5__GPIO5_23    0x1e4 /* IRQ */
+                       >;
+               };
        };
 };
 
@@ -38,6 +44,8 @@
 
        pmic: mc34708@8 {
                compatible = "fsl,mc34708";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_pmic>;
                reg = <0x08>;
                interrupt-parent = <&gpio5>;
                interrupts = <23 0x8>;