On Fri, 2015-07-24 at 20:46 +0800, Chenhui Zhao wrote:

+static void mpc85xx_pmc_set_wake(struct device *dev, void *enable)
 {
      int ret;
+     u32 value[2];
+
+     if (!device_may_wakeup(dev))
+             return;
+
+     if (!pmc_regs) {
+             dev_err(dev, "%s: PMC is unavailable\n", __func__);
+             return;
+     }
+
+     ret = of_property_read_u32_array(dev->of_node, "sleep", value, 2);

This will crash on any device without an of_node.

+     if (ret) {
+             dev_dbg(dev, "%s: Can not find the \"sleep\" property.\n",
+                     __func__);
+             return;
+     }
+
+     if (*(int *)enable)
+             pmc_pmcdr_mask &= ~value[1];
+     else
+             pmc_pmcdr_mask |= value[1];
+
+     if ((value[1] & 0xe0) && (pmc_flag & PMC_LOSSLESS))
+             pmc_powmgtcsr = POWMGTCSR_LOSSLESS;
+}

What is 0xe0?

-Scott