From: Ye Li <ye...@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...@nxp.com>
Signed-off-by: Peng Fan <peng....@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 3918578399..abf526bc68 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -61,6 +61,12 @@ 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)
--
2.16.4
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
