From 01fe02229eb3155bc274c7d11de28597c87f0616 Mon Sep 17 00:00:00 2001
From: Jacob Chen <jacob2.chen@rock-chips.com>
Date: Tue, 12 Dec 2017 09:54:24 +0800
Subject: [PATCH] clk: rockchip: do not register ddrclk if PSCI is not enabled
 on arm32

ARM32 system can run without trustos,
we should prevent arm_smccc_smc being called in such system.

Change-Id: Ic87b78107b464e3ab8dc72a3ca1fa9a64e358580
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/clk/rockchip/clk-ddr.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/clk/rockchip/clk-ddr.c b/drivers/clk/rockchip/clk-ddr.c
index 15838ff49a52..7fafcdf87de9 100644
--- a/drivers/clk/rockchip/clk-ddr.c
+++ b/drivers/clk/rockchip/clk-ddr.c
@@ -25,6 +25,9 @@
 #include <soc/rockchip/rockchip_sip.h>
 #include <soc/rockchip/scpi.h>
 #include <uapi/drm/drm_mode.h>
+#ifdef CONFIG_ARM
+#include <asm/psci.h>
+#endif
 
 #include "clk.h"
 
@@ -307,6 +310,11 @@ struct clk *rockchip_clk_register_ddrclk(const char *name, int flags,
 	struct clk_init_data init;
 	struct clk *clk;
 
+#ifdef CONFIG_ARM
+	if (!psci_smp_available())
+		return NULL;
+#endif
+
 	ddrclk = kzalloc(sizeof(*ddrclk), GFP_KERNEL);
 	if (!ddrclk)
 		return ERR_PTR(-ENOMEM);