From 7bff971a145c9fa0aa59c61c1fe0081c6b2db6dd Mon Sep 17 00:00:00 2001 From: Fabien Dessenne Date: Wed, 30 Oct 2019 14:38:30 +0100 Subject: [PATCH] stm32mp1: reset coprocessor status at cold boot Reset ResourceTableAddress and CoprocessorState at cold boot, preserve these values at standby wakeup. Signed-off-by: Fabien Dessenne Acked-by: Patrick Delaunay --- arch/arm/mach-stm32mp/cpu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/mach-stm32mp/cpu.c b/arch/arm/mach-stm32mp/cpu.c index ed7d9f6..6a71465 100644 --- a/arch/arm/mach-stm32mp/cpu.c +++ b/arch/arm/mach-stm32mp/cpu.c @@ -35,7 +35,9 @@ #define TAMP_CR1 (STM32_TAMP_BASE + 0x00) #define PWR_CR1 (STM32_PWR_BASE + 0x00) +#define PWR_MCUCR (STM32_PWR_BASE + 0x14) #define PWR_CR1_DBP BIT(8) +#define PWR_MCUCR_SBF BIT(6) /* DBGMCU register */ #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00) @@ -206,6 +208,11 @@ int arch_cpu_init(void) security_init(); update_bootmode(); #endif + /* Reset Coprocessor state unless it wakes up from Standby power mode */ + if (!(readl(PWR_MCUCR) & PWR_MCUCR_SBF)) { + writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE); + writel(0, TAMP_COPRO_RSC_TBL_ADDRESS); + } #endif boot_mode = get_bootmode(); -- 2.7.4