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imx8m: Configure trustzone region 0 for non-secure access

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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>
This commit is contained in:
Ye Li 2019-08-27 06:25:34 +00:00 • committed by Stefano Babic
parent dbb2b7e508
commit b3cf0a8f03
1 changed files with 6 additions and 0 deletions
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6
arch/arm/mach-imx/imx8m/soc.c
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@ -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)