+#ifdef CONFIG_SYS_FSL_ERRATUM_A009635
+#define PLATFORM_CYCLE_ENV_VAR "a009635_interval_val"
+
+static unsigned long get_internval_val_mhz(void)
+{
+ char *interval = getenv(PLATFORM_CYCLE_ENV_VAR);
+ /*
+ * interval is the number of platform cycles(MHz) between
+ * wake up events generated by EPU.
+ */
+ ulong interval_mhz = get_bus_freq(0) / (1000 * 1000);
+
+ if (interval)
+ interval_mhz = simple_strtoul(interval, NULL, 10);
+
+ return interval_mhz;
+}
+
+void erratum_a009635(void)
+{
+ u32 val;
+ unsigned long interval_mhz = get_internval_val_mhz();
+
+ if (!interval_mhz)
+ return;
+
+ val = in_le32(DCSR_CGACRE5);
+ writel(val | 0x00000200, DCSR_CGACRE5);
+
+ val = in_le32(EPU_EPCMPR5);
+ writel(interval_mhz, EPU_EPCMPR5);
+ val = in_le32(EPU_EPCCR5);
+ writel(val | 0x82820000, EPU_EPCCR5);
+ val = in_le32(EPU_EPSMCR5);
+ writel(val | 0x002f0000, EPU_EPSMCR5);
+ val = in_le32(EPU_EPECR5);
+ writel(val | 0x20000000, EPU_EPECR5);
+ val = in_le32(EPU_EPGCR);
+ writel(val | 0x80000000, EPU_EPGCR);
+}
+#endif /* CONFIG_SYS_FSL_ERRATUM_A009635 */
+