From: Yann Gautier <yann.gautier@st.com>
Date: Mon, 20 May 2019 12:39:26 +0000 (+0200)
Subject: clk: stm32mp: enable RTCAPB clock for dual-core chips
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=6cb45f8984af596fc5460204e9be1d85de79cf5e;p=project%2Fbcm63xx%2Fatf.git

clk: stm32mp: enable RTCAPB clock for dual-core chips

In order to correctly manage the bring-up of non boot CPUs, the RTCAPB
clock needs to be enabled.
It controls the access to backup registers, where the CPU entrypoint
will be stored.

Change-Id: Ifeeceb4faf64bc9e0778030444f437cc0bb27272
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
---

diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c
index 76e6e6fd..f3b9f0cc 100644
--- a/drivers/st/clk/stm32mp1_clk.c
+++ b/drivers/st/clk/stm32mp1_clk.c
@@ -1912,9 +1912,18 @@ static void stm32mp1_osc_init(void)
 	}
 }
 
+static void sync_earlyboot_clocks_state(void)
+{
+	if (!stm32mp_is_single_core()) {
+		stm32mp1_clk_enable_secure(RTCAPB);
+	}
+}
+
 int stm32mp1_clk_probe(void)
 {
 	stm32mp1_osc_init();
 
+	sync_earlyboot_clocks_state();
+
 	return 0;
 }