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diff --git a/sys/arm64/rockchip/rk805.c b/sys/arm64/rockchip/rk805.c
--- a/sys/arm64/rockchip/rk805.c
+++ b/sys/arm64/rockchip/rk805.c
@@ -31,8 +31,10 @@
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/clock.h>
+#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/module.h>
+#include <sys/reboot.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <machine/bus.h>
@@ -844,6 +846,29 @@
return (error);
}
+static void
+rk805_poweroff(void *arg, int howto)
+{
+ device_t dev = arg;
+ int error;
+ uint8_t val;
+
+ if ((howto & RB_POWEROFF) == 0)
+ return;
+
+ device_printf(dev, "Powering off...\n");
+ error = rk805_read(dev, RK805_DEV_CTRL, &val, 1);
+ if (error == 0) {
+ val |= RK805_DEV_CTRL_OFF;
+ error = rk805_write(dev, RK805_DEV_CTRL, &val, 1);
+
+ /* Wait a bit for the command to take effect. */
+ if (error == 0)
+ DELAY(100);
+ }
+ device_printf(dev, "Power off failed\n");
+}
+
static int
rk805_attach(device_t dev)
{
@@ -907,6 +932,17 @@
}
}
+ if (OF_hasprop(ofw_bus_get_node(dev),
+ "rockchip,system-power-controller")) {
+ /*
+ * The priority is chosen to override PSCI and EFI shutdown
+ * methods as those two just hang without powering off on Rock64
+ * at least.
+ */
+ EVENTHANDLER_REGISTER(shutdown_final, rk805_poweroff, dev,
+ SHUTDOWN_PRI_LAST - 2);
+ }
+
return (0);
}
diff --git a/sys/arm64/rockchip/rk805reg.h b/sys/arm64/rockchip/rk805reg.h
--- a/sys/arm64/rockchip/rk805reg.h
+++ b/sys/arm64/rockchip/rk805reg.h
@@ -93,6 +93,10 @@
#define RK808_LDO8_ON_VSEL 0x49
#define RK808_LDO8_SLEEP_VSEL 0x4A
+#define RK805_DEV_CTRL 0x4B
+#define RK805_DEV_CTRL_OFF (1 << 0)
+#define RK805_DEV_CTRL_SLP (1 << 1)
+
enum rk805_regulator {
RK805_DCDC1 = 0,
RK805_DCDC2,

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