Due to that SCP core 0 controls the SCP clock and SRAM power, add two
new mtk_scp_of_data operations, scp_boot_peers and scp_shutdown_peers,
to manage the boot sequence and watchdog timeout handling of SCP core 1.
It ensures that core 1 boots after or shuts down before core 0 for
maintaining the proper control flow over SCP core 1.

Signed-off-by: Tinghan Shen <redacted>
---
  drivers/remoteproc/mtk_common.h |  3 ++
  drivers/remoteproc/mtk_scp.c    | 55 +++++++++++++++++++++++++++++++++
  2 files changed, 58 insertions(+)

diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 56395e8664cb..0bfd242c41cc 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h

@@ -93,6 +93,8 @@ struct mtk_scp_of_data {
  	void (*scp_reset_deassert)(struct mtk_scp *scp);
  	void (*scp_stop)(struct mtk_scp *scp);
  	void *(*scp_da_to_va)(struct mtk_scp *scp, u64 da, size_t len);
+	void (*scp_boot_peers)(struct mtk_scp *scp);
+	void (*scp_shutdown_peers)(struct mtk_scp *scp);
  
  	u32 host_to_scp_reg;
  	u32 host_to_scp_int_bit;

@@ -130,6 +132,7 @@ struct mtk_scp {
  	struct rproc_subdev *rpmsg_subdev;
  
  	struct list_head elem;
+	struct list_head *cluster;
  };
  
  /**

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index d644e232dfec..edbf71f4c21e 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c

@@ -74,8 +74,21 @@ void scp_put(struct mtk_scp *scp)
  }
  EXPORT_SYMBOL_GPL(scp_put);
  
+static void mt8195_scp_shutdown_peers(struct mtk_scp *scp)
+{
+	struct mtk_scp *next_scp;
+
+	next_scp = list_next_entry(scp, elem);
+	list_for_each_entry_from(next_scp, scp->cluster, elem) {
+		rproc_shutdown(next_scp->rproc);
+	}