mediatek: mt8192: Add SPM suspend driver
Supports dram/mainpll/26m off when system suspend
Change-Id: Id13a06d4132f00fb60066de75920ecac18306e32
diff --git a/plat/mediatek/mt8192/drivers/spm/mt_spm.h b/plat/mediatek/mt8192/drivers/spm/mt_spm.h
new file mode 100644
index 0000000..b147fe2
--- /dev/null
+++ b/plat/mediatek/mt8192/drivers/spm/mt_spm.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef MT_SPM_H
+#define MT_SPM_H
+
+#include <lib/bakery_lock.h>
+#include <lib/spinlock.h>
+
+#include <plat_mtk_lpm.h>
+
+/*
+ * ARM v8.2, the cache will turn off automatically when cpu
+ * power down. So, there is no doubt to use the spin_lock here
+ */
+#if !HW_ASSISTED_COHERENCY
+#define MT_SPM_USING_BAKERY_LOCK
+#endif
+
+#ifdef MT_SPM_USING_BAKERY_LOCK
+DECLARE_BAKERY_LOCK(spm_lock);
+#define plat_spm_lock() bakery_lock_get(&spm_lock)
+#define plat_spm_unlock() bakery_lock_release(&spm_lock)
+#else
+extern spinlock_t spm_lock;
+#define plat_spm_lock() spin_lock(&spm_lock)
+#define plat_spm_unlock() spin_unlock(&spm_lock)
+#endif
+
+#define MT_SPM_USING_SRCLKEN_RC
+
+/* spm extern operand definition */
+#define MT_SPM_EX_OP_CLR_26M_RECORD (1U << 0)
+#define MT_SPM_EX_OP_SET_WDT (1U << 1)
+#define MT_SPM_EX_OP_NON_GENERIC_RESOURCE_REQ (1U << 2)
+#define MT_SPM_EX_OP_SET_SUSPEND_MODE (1U << 3)
+#define MT_SPM_EX_OP_SET_IS_ADSP (1U << 4)
+#define MT_SPM_EX_OP_SRCLKEN_RC_BBLPM (1U << 5)
+#define MT_SPM_EX_OP_HW_S1_DETECT (1U << 6)
+
+typedef enum {
+ WR_NONE = 0,
+ WR_UART_BUSY = 1,
+ WR_ABORT = 2,
+ WR_PCM_TIMER = 3,
+ WR_WAKE_SRC = 4,
+ WR_DVFSRC = 5,
+ WR_TWAM = 6,
+ WR_PMSR = 7,
+ WR_SPM_ACK_CHK = 8,
+ WR_UNKNOWN = 9,
+} wake_reason_t;
+
+static inline void spm_lock_get(void)
+{
+ plat_spm_lock();
+}
+
+static inline void spm_lock_release(void)
+{
+ plat_spm_unlock();
+}
+
+extern void spm_boot_init(void);
+#endif /* MT_SPM_H */