GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/plat/mediatek/mt8173/drivers/rtc/rtc.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <common/debug.h>
+
+#include <mt8173_def.h>
+#include <rtc.h>
+
+void rtc_bbpu_power_down(void)
+{
+	uint16_t bbpu;
+
+	/* pull PWRBB low */
+	bbpu = RTC_BBPU_KEY | RTC_BBPU_AUTO | RTC_BBPU_PWREN;
+	if (Writeif_unlock()) {
+		RTC_Write(RTC_BBPU, bbpu);
+		if (!RTC_Write_Trigger())
+			assert(0);
+	} else {
+		assert(0);
+	}
+}