imx95: Add get_reset_reason() to retrieve the LM/system last booted/shutdown reasons

System Manager provides the last booted and shutdown reasons of the
logical machines (LM) and system using the SCMI misc protocol (Protocol
ID: 0x84, Message ID: 0xA). This path adds get_reset_reason() to query
and print these reasons in SPL and U-Boot.

Signed-off-by: Peng Fan <[email protected]>
Signed-off-by: Alice Guo <[email protected]>
Reviewed-by: Ye Li <[email protected]>

1 files changed, 55 insertions, 0 deletions

diff --git a/include/scmi_nxp_protocols.h b/include/scmi_nxp_protocols.h
new file mode 100644
index 00000000000..fe6ecd6a7cf
--- /dev/null
+++ b/include/scmi_nxp_protocols.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright 2025 NXP
+ */
+
+#ifndef _SCMI_NXP_PROTOCOLS_H
+#define _SCMI_NXP_PROTOCOLS_H
+
+#include <asm/types.h>
+#include <linux/bitops.h>
+
+enum scmi_imx_protocol {
+	SCMI_IMX_PROTOCOL_ID_MISC = 0x84,
+};
+
+#define SCMI_PAYLOAD_LEN	100
+
+#define SCMI_ARRAY(X, Y)	((SCMI_PAYLOAD_LEN - (X)) / sizeof(Y))
+
+#define SCMI_IMX_MISC_RESET_REASON	0xA
+
+struct scmi_imx_misc_reset_reason_in {
+#define MISC_REASON_FLAG_SYSTEM		BIT(0)
+	u32 flags;
+};
+
+struct scmi_imx_misc_reset_reason_out {
+	s32 status;
+	/* Boot reason flags */
+#define MISC_BOOT_FLAG_VLD	BIT(31)
+#define MISC_BOOT_FLAG_ORG_VLD	BIT(28)
+#define MISC_BOOT_FLAG_ORIGIN	GENMASK(27, 24)
+#define MISC_BOOT_FLAG_O_SHIFT	24
+#define MISC_BOOT_FLAG_ERR_VLD	BIT(23)
+#define MISC_BOOT_FLAG_ERR_ID	GENMASK(22, 8)
+#define MISC_BOOT_FLAG_E_SHIFT	8
+#define MISC_BOOT_FLAG_REASON	GENMASK(7, 0)
+	u32 bootflags;
+	/* Shutdown reason flags */
+#define MISC_SHUTDOWN_FLAG_VLD		BIT(31)
+#define MISC_SHUTDOWN_FLAG_EXT_LEN	GENMASK(30, 29)
+#define MISC_SHUTDOWN_FLAG_ORG_VLD	BIT(28)
+#define MISC_SHUTDOWN_FLAG_ORIGIN	GENMASK(27, 24)
+#define MISC_SHUTDOWN_FLAG_O_SHIFT	24
+#define MISC_SHUTDOWN_FLAG_ERR_VLD	BIT(23)
+#define MISC_SHUTDOWN_FLAG_ERR_ID	GENMASK(22, 8)
+#define MISC_SHUTDOWN_FLAG_E_SHIFT	8
+#define MISC_SHUTDOWN_FLAG_REASON	GENMASK(7, 0)
+	u32 shutdownflags;
+	/* Array of extended info words */
+#define MISC_MAX_EXTINFO	SCMI_ARRAY(16, u32)
+	u32 extInfo[MISC_MAX_EXTINFO];
+};
+
+#endif