Tegra: bpmp: suspend/resume handlers
This patch adds suspend and resume handlers for the BPMP
interface. Mark the interface as "suspended" before entering
System Suspend and verify that BPMP is alive on exit.
Change-Id: I74ccbc86125079b46d06360fc4c7e8a5acfbdfb2
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/include/drivers/bpmp.h b/plat/nvidia/tegra/include/drivers/bpmp.h
index 03da6f6..0046f6c 100644
--- a/plat/nvidia/tegra/include/drivers/bpmp.h
+++ b/plat/nvidia/tegra/include/drivers/bpmp.h
@@ -29,6 +29,7 @@
/* flags to indicate bpmp driver's state */
#define BPMP_INIT_COMPLETE 0xBEEFF00DU
#define BPMP_INIT_PENDING 0xDEADBEEFU
+#define BPMP_SUSPEND_ENTRY 0xF00DCAFEU
/* requests serviced by the bpmp */
#define MRQ_PING 0
@@ -107,6 +108,16 @@
int tegra_bpmp_init(void);
/**
+ * Function to suspend the interface with the bpmp
+ */
+void tegra_bpmp_suspend(void);
+
+/**
+ * Function to resume the interface with the bpmp
+ */
+void tegra_bpmp_resume(void);
+
+/**
* Handler to send a MRQ_* command to the bpmp
*/
int32_t tegra_bpmp_send_receive_atomic(int mrq, const void *ob_data, int ob_sz,