From 6cb45f8984af596fc5460204e9be1d85de79cf5e Mon Sep 17 00:00:00 2001 From: Yann Gautier Date: Mon, 20 May 2019 14:39:26 +0200 Subject: [PATCH] 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 Signed-off-by: Etienne Carriere Signed-off-by: Nicolas Le Bayon --- drivers/st/clk/stm32mp1_clk.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c index 76e6e6fdc..f3b9f0cc3 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; }