[PATCH v1 1/2] imx: scu_api: add implementation of sc_pm_reset_reason

[Igor Opaniuk]

Add implementation of sc_pm_reset_reason() call for obtaining
reset reason.

Signed-off-by: Igor Opaniuk <igor.opaniuk at foundries.io>
---

 drivers/misc/imx8/scu_api.c    | 22 ++++++++++++++++++++++
 include/firmware/imx/sci/sci.h |  6 ++++++
 2 files changed, 28 insertions(+)

diff --git a/drivers/misc/imx8/scu_api.c b/drivers/misc/imx8/scu_api.c
index 3e3002ba6df..6e2c678e614 100644
--- a/drivers/misc/imx8/scu_api.c
+++ b/drivers/misc/imx8/scu_api.c
@@ -882,6 +882,28 @@ void sc_pm_reboot(sc_ipc_t ipc, sc_pm_reset_type_t type)
 	misc_call(dev, SC_TRUE, &msg, size, &msg, size);
 }
 
+int sc_pm_reset_reason(sc_ipc_t ipc, sc_pm_reset_reason_t *reason)
+{
+	struct udevice *dev = gd->arch.scu_dev;
+	struct sc_rpc_msg_s msg;
+	int size = sizeof(struct sc_rpc_msg_s);
+	int ret;
+
+	RPC_VER(&msg) = SC_RPC_VERSION;
+	RPC_SVC(&msg) = (u8)SC_RPC_SVC_PM;
+	RPC_FUNC(&msg) = (u8)PM_FUNC_RESET_REASON;
+	RPC_SIZE(&msg) = 1U;
+
+	ret = misc_call(dev, SC_FALSE, &msg, size, &msg, size);
+	if (ret)
+		printf("%s: res:%d\n", __func__, RPC_U8(&msg, 0U));
+
+	if (reason)
+		*reason = RPC_U8(&msg, 0U);
+
+	return ret;
+}
+
 int sc_pm_get_resource_power_mode(sc_ipc_t ipc, sc_rsrc_t resource,
 				  sc_pm_power_mode_t *mode)
 {
diff --git a/include/firmware/imx/sci/sci.h b/include/firmware/imx/sci/sci.h
index f832982b3de..7d8499f070a 100644
--- a/include/firmware/imx/sci/sci.h
+++ b/include/firmware/imx/sci/sci.h
@@ -75,6 +75,7 @@ int sc_pm_set_clock_parent(sc_ipc_t ipc, sc_rsrc_t resource, sc_pm_clk_t clk,
 int sc_pm_cpu_start(sc_ipc_t ipc, sc_rsrc_t resource, sc_bool_t enable,
 		    sc_faddr_t address);
 void sc_pm_reboot(sc_ipc_t ipc, sc_pm_reset_type_t type);
+int sc_pm_reset_reason(sc_ipc_t ipc, sc_pm_reset_reason_t *reason);
 sc_bool_t sc_pm_is_partition_started(sc_ipc_t ipc, sc_rm_pt_t pt);
 int sc_pm_resource_reset(sc_ipc_t ipc, sc_rsrc_t resource);
 
@@ -385,6 +386,11 @@ static inline void sc_pm_reboot(sc_ipc_t ipc, sc_pm_reset_type_t type)
 {
 }
 
+static inline int sc_pm_reset_reason(sc_ipc_t ipc, sc_pm_reset_reason_t *reason)
+{
+	return -EOPNOTSUPP;
+}
+
 static inline int sc_seco_v2x_build_info(sc_ipc_t ipc, u32 *version, u32 *commit)
 {
 	return -EOPNOTSUPP;
-- 
2.34.1