33 lines
1.0 KiB
Diff
33 lines
1.0 KiB
Diff
From: Arturo Buzarra <arturo.buzarra@digi.com>
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Date: Fri, 27 Dec 2019 09:42:48 +0100
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Subject: [PATCH] imx8mn: Disable M7 debug console
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The Cortex-M7 uses the UART4 as debug console, and it is
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shared with the Cortex-A53.
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Signed-off-by: Arturo Buzarra <arturo.buzarra@digi.com>
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---
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plat/imx/imx8mn/imx8mn_bl31_setup.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/plat/imx/imx8mn/imx8mn_bl31_setup.c b/plat/imx/imx8mn/imx8mn_bl31_setup.c
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index 57db28a..a36c2d5 100644
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--- a/plat/imx/imx8mn/imx8mn_bl31_setup.c
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+++ b/plat/imx/imx8mn/imx8mn_bl31_setup.c
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@@ -242,11 +242,12 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
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#endif
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bl31_tzc380_setup();
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/* Assign M7 to domain 1 */
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mmio_write_32(IMX_RDC_BASE + 0x204, 0x1);
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- mmio_write_32(IMX_RDC_BASE + 0x518, 0xfc);
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+ /* Uncomment to use the M7 debug console (shared with A53 UART4) */
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+ /*mmio_write_32(IMX_RDC_BASE + 0x518, 0xfc);*/
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mmio_write_32(IMX_RDC_BASE + 0x5A4, 0xf3);
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}
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void bl31_plat_arch_setup(void)
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{
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--
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