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imx8: scu: use dedicated MU for SPL
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>
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@ -3,6 +3,13 @@ if ARCH_IMX8
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config IMX8
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bool
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config MU_BASE_SPL
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hex "MU base address used in SPL"
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default 0x5d1b0000
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help
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SPL runs in EL3 mode, it use MU0_A to communicate with SCU.
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So we could not reuse the one in dts which is for normal U-Boot.
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config IMX8QXP
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select IMX8
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select SUPPORT_SPL
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@ -191,7 +191,11 @@ static int imx8_scu_probe(struct udevice *dev)
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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#ifdef CONFIG_SPL_BUILD
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plat->base = (struct mu_type *)CONFIG_MU_BASE_SPL;
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#else
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plat->base = (struct mu_type *)addr;
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#endif
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/* U-Boot not enable interrupts, so need to enable RX interrupts */
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mu_hal_init(plat->base);
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