[PATCH 5/5] ARM: mach-imx: tzasc: add imx6q_tzc380_is_enabled
Ahmad Fatoum
a.fatoum at pengutronix.de
Tue Jun 24 03:36:07 PDT 2025
On 6/19/25 17:25, Marco Felsch wrote:
> In preparation of adding an i.MX6QD optee-early helper add a helper to
> check if the early code e.g. PBL/BootROM enabled the TZC380 controllers
> on the i.MX6QDL.
>
> Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
> arch/arm/mach-imx/tzasc.c | 15 +++++++++++++++
> include/mach/imx/tzasc.h | 1 +
> 2 files changed, 16 insertions(+)
>
> diff --git a/arch/arm/mach-imx/tzasc.c b/arch/arm/mach-imx/tzasc.c
> index aad6ece64f18..14b72386ad53 100644
> --- a/arch/arm/mach-imx/tzasc.c
> +++ b/arch/arm/mach-imx/tzasc.c
> @@ -76,6 +76,9 @@
> #define MX6_TZASC1_BASE 0x21d0000
> #define MX6_TZASC2_BASE 0x21d4000
>
> +#define MX6_GPR_TZASC1_EN BIT(0)
> +#define MX6_GPR_TZASC2_EN BIT(1)
> +
> #define GPR_TZASC_EN BIT(0)
> #define GPR_TZASC_ID_SWAP_BYPASS BIT(1)
> #define GPR_TZASC_EN_LOCK BIT(16)
> @@ -293,6 +296,18 @@ void imx6q_tzc380_early_ns_region1(void)
> TZC380_REGION_SP_NS_RW);
> }
>
> +bool imx6q_tzc380_is_enabled(void)
> +{
> + u32 __iomem *gpr = IOMEM(MX6_IOMUXC_BASE_ADDR);
> +
> + /*
> + * MX6_GPR_TZASC1_EN and MX6_GPR_TZASC2_EN are sticky bits which
> + * preserve their values once set until the next power-up cycle.
> + */
> + return (readl(&gpr[9]) & (MX6_GPR_TZASC1_EN | MX6_GPR_TZASC2_EN)) ==
> + (MX6_GPR_TZASC1_EN | MX6_GPR_TZASC2_EN);
> +}
> +
> void imx8m_tzc380_init(void)
> {
> u32 __iomem *gpr = IOMEM(MX8M_IOMUXC_GPR_BASE_ADDR);
> diff --git a/include/mach/imx/tzasc.h b/include/mach/imx/tzasc.h
> index 4d3f26fc82f1..59ec56a5ec60 100644
> --- a/include/mach/imx/tzasc.h
> +++ b/include/mach/imx/tzasc.h
> @@ -7,6 +7,7 @@
> #include <asm/system.h>
>
> void imx6q_tzc380_early_ns_region1(void);
> +bool imx6q_tzc380_is_enabled(void);
> void imx8m_tzc380_init(void);
> bool imx8m_tzc380_is_enabled(void);
>
--
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