[Pdbg] [PATCH 05/14] libpdbg/p9chip.c: Implement target release to lower special wakeup

[Nicholas Piggin]

Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
---
 libpdbg/libpdbg.h | 1 +
 libpdbg/p9chip.c  | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/libpdbg/libpdbg.h b/libpdbg/libpdbg.h
index 8c57193..e57058a 100644
--- a/libpdbg/libpdbg.h
+++ b/libpdbg/libpdbg.h
@@ -37,6 +37,7 @@ uint64_t pdbg_get_address(struct pdbg_target *target, uint64_t *size);
 /* Misc. */
 void pdbg_targets_init(void *fdt);
 void pdbg_target_probe(void);
+void pdbg_target_release(void);
 void pdbg_enable_target(struct pdbg_target *target);
 void pdbg_disable_target(struct pdbg_target *target);
 enum pdbg_target_status pdbg_target_status(struct pdbg_target *target);
diff --git a/libpdbg/p9chip.c b/libpdbg/p9chip.c
index 033e3eb..a969ef6 100644
--- a/libpdbg/p9chip.c
+++ b/libpdbg/p9chip.c
@@ -237,12 +237,20 @@ static int p9_core_probe(struct pdbg_target *target)
 	return 0;
 }
 
+static void p9_core_release(struct pdbg_target *target)
+{
+	usleep(1000); /* enforce small delay before and after it is cleared */
+	pib_write(target, PPM_SPWKUP_OTR, 0);
+	usleep(10000);
+}
+
 struct core p9_core = {
 	.target = {
 		.name = "POWER9 Core",
 		.compatible = "ibm,power9-core",
 		.class = "core",
 		.probe = p9_core_probe,
+		.release = p9_core_release,
 	},
 };
 DECLARE_HW_UNIT(p9_core);
-- 
2.17.0