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-rw-r--r--arch/arm/mach-hisi/hotplug.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/mach-hisi/hotplug.c b/arch/arm/mach-hisi/hotplug.c
index abd441b0c604..84e6919f68c7 100644
--- a/arch/arm/mach-hisi/hotplug.c
+++ b/arch/arm/mach-hisi/hotplug.c
@@ -57,6 +57,14 @@
#define CPU0_NEON_SRST_REQ_EN (1 << 4)
#define CPU0_SRST_REQ_EN (1 << 0)
+#define HIX5HD2_PERI_CRG20 0x50
+#define CRG20_CPU1_RESET (1 << 17)
+
+#define HIX5HD2_PERI_PMC0 0x1000
+#define PMC0_CPU1_WAIT_MTCOMS_ACK (1 << 8)
+#define PMC0_CPU1_PMC_ENABLE (1 << 7)
+#define PMC0_CPU1_POWERDOWN (1 << 3)
+
enum {
HI3620_CTRL,
ERROR_CTRL,
@@ -157,6 +165,50 @@ void hi3xxx_set_cpu(int cpu, bool enable)
set_cpu_hi3620(cpu, enable);
}
+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);
+ }
+}
+
static inline void cpu_enter_lowpower(void)
{
unsigned int v;
@@ -199,4 +251,10 @@ int hi3xxx_cpu_kill(unsigned int cpu)
hi3xxx_set_cpu(cpu, false);
return 1;
}
+
+void hix5hd2_cpu_die(unsigned int cpu)
+{
+ flush_cache_all();
+ hix5hd2_set_cpu(cpu, false);
+}
#endif