From: Ye Li ye.li@nxp.com
Set trustzone region 0 to allow both non-secure and secure access when trust zone is enabled. We found USB controller fails to access DDR if the default region 0 is secure access only.
Signed-off-by: Ye Li ye.li@nxp.com Signed-off-by: Peng Fan peng.fan@nxp.com --- arch/arm/mach-imx/imx8m/soc.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index 261f586fc0..a33ca35653 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -57,6 +57,12 @@ void enable_tzc380(void) setbits_le32(&gpr->gpr[10], GPR_TZASC_EN_LOCK); if (IS_ENABLED(CONFIG_IMX8MM)) setbits_le32(&gpr->gpr[10], BIT(1)); + /* + * set Region 0 attribute to allow secure and non-secure + * read/write permission. Found some masters like usb dwc3 + * controllers can't work with secure memory. + */ + writel(0xf0000000, TZASC_BASE_ADDR + 0x108); }
void set_wdog_reset(struct wdog_regs *wdog)