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imx8: scu: use dedicated MU for SPL

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SPL runs in EL3 mode, except MU0_A, others are not powered on,
and could not be used. However normal U-Boot use MU1_A, so we
could not reuse the one in dts. And we could not replace the one
in dts with MU0_A, because MU0_A is reserved in secure world.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2018-12-21 06:21:15 +00:00 committed by Stefano Babic
parent 3bd888b55e
commit 04b249656e
2 changed files with 11 additions and 0 deletions
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7
arch/arm/mach-imx/imx8/Kconfig
View file

@ -3,6 +3,13 @@ if ARCH_IMX8
config IMX8
bool
config MU_BASE_SPL
hex "MU base address used in SPL"
default 0x5d1b0000
help
SPL runs in EL3 mode, it use MU0_A to communicate with SCU.
So we could not reuse the one in dts which is for normal U-Boot.
config IMX8QXP
select IMX8
select SUPPORT_SPL

4
drivers/misc/imx8/scu.c
View file

@ -191,7 +191,11 @@ static int imx8_scu_probe(struct udevice *dev)
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
#ifdef CONFIG_SPL_BUILD
plat->base = (struct mu_type *)CONFIG_MU_BASE_SPL;
#else
plat->base = (struct mu_type *)addr;
#endif
/* U-Boot not enable interrupts, so need to enable RX interrupts */
mu_hal_init(plat->base);