+static bool hix5hd2_hotplug_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "hisilicon,cpuctrl");
+ if (np) {
+ ctrl_base = of_iomap(np, 0);
+ return true;
+ }
+ return false;
+}
+
+void hix5hd2_set_cpu(int cpu, bool enable)
+{
+ u32 val = 0;
+
+ if (!ctrl_base)
+ if (!hix5hd2_hotplug_init())
+ BUG();
+
+ if (enable) {
+ /* power on cpu1 */
+ val = readl_relaxed(ctrl_base + HIX5HD2_PERI_PMC0);
+ val &= ~(PMC0_CPU1_WAIT_MTCOMS_ACK | PMC0_CPU1_POWERDOWN);
+ val |= PMC0_CPU1_PMC_ENABLE;
+ writel_relaxed(val, ctrl_base + HIX5HD2_PERI_PMC0);
+ /* unreset */
+ val = readl_relaxed(ctrl_base + HIX5HD2_PERI_CRG20);
+ val &= ~CRG20_CPU1_RESET;
+ writel_relaxed(val, ctrl_base + HIX5HD2_PERI_CRG20);
+ } else {
+ /* power down cpu1 */
+ val = readl_relaxed(ctrl_base + HIX5HD2_PERI_PMC0);
+ val |= PMC0_CPU1_PMC_ENABLE | PMC0_CPU1_POWERDOWN;
+ val &= ~PMC0_CPU1_WAIT_MTCOMS_ACK;
+ writel_relaxed(val, ctrl_base + HIX5HD2_PERI_PMC0);
+
+ /* reset */
+ val = readl_relaxed(ctrl_base + HIX5HD2_PERI_CRG20);
+ val |= CRG20_CPU1_RESET;
+ writel_relaxed(val, ctrl_base + HIX5HD2_PERI_CRG20);
+ }
+}
+