[PATCH] ARM: stm32: Fix TAMP_SMCR BKP..PROT fields on STM32MP15xx

[Patrice CHOTARD]

On 6/19/24 00:57, Marek Vasut wrote:
> Update the TAMP_SMCR BKP..PROT fields to put first 10 registers
> into protection zone 1 and next 5 into zone 2. This fixes use of
> boot counter which is often in zone 3 and has to be updated from
> Linux, which runs in NS.
> 
> Fixes: 73f7fc944cf6 ("ARM: stm32: Initialize TAMP_SMCR BKP..PROT fields on STM32MP15xx")
> Signed-off-by: Marek Vasut <marex at denx.de>
> ---
> Cc: Patrice Chotard <patrice.chotard at foss.st.com>
> Cc: Patrick Delaunay <patrick.delaunay at foss.st.com>
> Cc: Tom Rini <trini at konsulko.com>
> Cc: u-boot at lists.denx.de
> Cc: uboot-stm32 at st-md-mailman.stormreply.com
> ---
>  arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c b/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c
> index f096fe538d8..ca202bec8ee 100644
> --- a/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c
> +++ b/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c
> @@ -148,8 +148,8 @@ static void security_init(void)
>  	 */
>  	clrsetbits_le32(TAMP_SMCR,
>  			TAMP_SMCR_BKPRWDPROT | TAMP_SMCR_BKPWDPROT,
> -			FIELD_PREP(TAMP_SMCR_BKPRWDPROT, 0x20) |
> -			FIELD_PREP(TAMP_SMCR_BKPWDPROT, 0x20));
> +			FIELD_PREP(TAMP_SMCR_BKPRWDPROT, 0x0A) |
> +			FIELD_PREP(TAMP_SMCR_BKPWDPROT, 0x0F));
>  
>  	/* GPIOZ: deactivate the security */
>  	writel(BIT(0), RCC_MP_AHB5ENSETR);

Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>

Thanks
Patrice