drivers: introduce ST ETZPC driver
ETZPC stands for Extended TrustZone Protection Controller. It is a
resource conditional access device. It is mainly based on Arm TZPC.
ST ETZPC exposes memory mapped DECPROT cells to set access permissions
to SoC peripheral interfaces as I2C, SPI, DDR controllers, and some
of the SoC internal memories.
ST ETZPC exposes memory mapped TZMA cells to set access permissions
to some SoC internal memories.
Change-Id: I47ce20ffcfb55306dab923153b71e1bcbe2a5570
Co-developed-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/include/dt-bindings/soc/st,stm32-etzpc.h b/include/dt-bindings/soc/st,stm32-etzpc.h
new file mode 100644
index 0000000..3f9fb3b
--- /dev/null
+++ b/include/dt-bindings/soc/st,stm32-etzpc.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2017-2020, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+ */
+
+#ifndef _DT_BINDINGS_STM32_ETZPC_H
+#define _DT_BINDINGS_STM32_ETZPC_H
+
+/* DECPROT modes */
+#define DECPROT_S_RW 0x0
+#define DECPROT_NS_R_S_W 0x1
+#define DECPROT_MCU_ISOLATION 0x2
+#define DECPROT_NS_RW 0x3
+
+/* DECPROT lock */
+#define DECPROT_UNLOCK 0x0
+#define DECPROT_LOCK 0x1
+
+#endif /* _DT_BINDINGS_STM32_ETZPC_H */