Re: [PATCH v2 2/2] ARM: boards: i.MX93: Add NXP FRDM i.MX93 support

[Fabian Pflug <f.pflug@pengutronix.de>]

Hey,

On Tue, 2025-10-21 at 13:43 +0200, Ahmad Fatoum wrote:
> Hello Fabian,
> 
> On 10/21/25 1:37 PM, Fabian Pflug wrote:
> > Hello Ahmad,
> > 
> > On Tue, 2025-10-21 at 13:11 +0200, Ahmad Fatoum wrote:
> > > Hello Fabian,
> > > 
> > > > +static noinline void frdm_imx93_continue(void)
> > > > +{
> > > > +	void __iomem *base = IOMEM(MX9_UART1_BASE_ADDR);
> > > > +	void __iomem *muxbase = IOMEM(MX9_IOMUXC_BASE_ADDR);
> > > > +
> > > > +	/* configure LPUART1 TX pin */
> > > > +	writel(0x0, muxbase + 0x184);
> > > > +
> > > > +	imx9_uart_setup(base);
> > > > +	pbl_set_putc(lpuart32_putc, base + 0x10);
> > > > +	putchar('>');
> > > 
> > > Do you see the > character on bootup if CONFIG_PBL_CONSOLE is enabled?
> > > Maud (Cc'd) mentioned on the IRC that the 0x10 offset shouldn't be
> > > necessary.
> > > 
> > 
> > I did see the > character with (working with a 2025.07.0 barebox here):
> 
> Ok, good to know.
> 
> 
> > But there seems to be another Problem. If I enable
> > 
> > CONFIG_DEBUG_LL=y
> > CONFIG_DEBUG_IMX_UART=y
> > CONFIG_DEBUG_IMX8M_UART=y
> > CONFIG_DEBUG_IMX_UART_PORT=1
> > CONFIG_DEBUG_PBL=y
> 
> Given that you are using the i.MX9's LPUART, I think it's expected that
> DEBUG_LL misbehaves. PBL output works, because the PBL console has
> precedence over DEBUG_LL.
> 

You are right. Thank you.

With 

# CONFIG_DEBUG_IMX8M_UART is not set
CONFIG_DEBUG_IMX9_UART=y

everything works as expected:

>imx9-ddr: DDRINFO: start DRAM init
imx9-ddr: DDRINFO: cfg clk
imx9-ddr: DDRINFO:ddrphy config start
imx-ddr: DRAM PHY training for 3733MTS
imx-ddr: DRAM PHY training for 3733MTS
imx9-ddr: DDRINFO: ddrphy config done
imx9-ddr: DDRINFO: ddrc config start
imx9-ddr: DDRINFO: ddrc config done
romapi: imx93_romapi_load_image: IVT offset on boot device: 0x00008000
romapi: imx93_romapi_load_image: offset in image: 0x00002000
NOTICE:  TRDC init done
NOTICE:  BL31: v2.12.0(release):v2.12
NOTICE:  BL31: Built : 00:00:00, Sep  1 2025
>uncompress.c: memory at 0x80000000, size 0x80000000
mmu: enabling MMU, ttb @ 0xfffe0000
endmem                = 0x100000000
arm_mem_scratch       = 0xffff8000+0x00008000
arm_mem_stack         = 0xffff0000+0x00008000
arm_mem_ttb           = 0xfffe0000+0x00010000
arm_mem_barebox_image = 0xffd00000+0x00300000
arm_mem_early_malloc  = 0xffce0000+0x00020000
membase               = 0x80000000+0x80000000
uncompress.c: uncompressing barebox binary at 0x0000000080223980 (size 0x000773e4) to 0xffd00000 (uncompressed size:
0x001b81b0)
uncompress.c: jumping to uncompressed image at 0x00000000ffd00000
imx9: Detected IMX9352C (-40 - 105C)
Switch to console [serial0]


barebox 2025.07.0-00002-g597819f252f1 #9 2025-10-21T11:49:22+00:00
Buildsystem version: DistroKit-2019.12.0-741-g6e3d355a


Board: NXP i.MX93 11X11 FRDM board
imx9: Detected IMX9352C (-40 - 105C)
ele: Current lifecycle: OEM Open
ele: Event 0x0287eed6:
ele:   IPC = MU APD (0x02)
ele:   CMD = ELE_OEM_CNTN_AUTH (0x87)
ele:   IND = ELE_NO_AUTHENTICATION_FAILURE (0xee)
ele:   STA = ELE_SUCCESS (0xd6)
netconsole: registered as netconsole-1
psci psci.of: detected version 1.1
pca9450-i2c pca9451a0: PMIC Chip ID: 0x9
imx-esdhc 42850000.mmc@42850000.of: registered as mmc0
imx-esdhc 42860000.mmc@42860000.of: registered as mmc1
mdio_bus: miibus0: probed
mdio_bus: miibus1: probed
imx-usb 4c200000.usb@4c200000.of: USB EHCI 1.00
mmc1: detected SD card version 2.0
WARNING: mmc1: GPT:Primary header thinks Alt. header is not at the end of the disk.
WARNING: mmc1: GPT:333863 != 61071359
WARNING: mmc1: GPT:Alternate GPT header not at the end of the disk.
WARNING: mmc1: GPT:333863 != 61071359
WARNING: mmc1: GPT: Use parted to correct GPT errors.
mmc1: registered mmc1
state: New state registered 'state'
state: Using bucket 0@0x00000000
malloc space: 0xbfe80000 -> 0xffcfffff (size 1022.5 MiB)
found force-builtin environment, using defaultenv
multi_bind: creating Fastboot function
g_multi gadget0: Multifunction Composite Gadget
g_multi gadget0: g_multi ready
mmc0: detected MMC card version 5.1
mmc0: registered mmc0.boot0
mmc0: registered mmc0.boot1
mmc0: registered mmc0
detect: No such device

Hit m for menu or any to stop autoboot:    3
barebox@NXP i.MX93 11X11 FRDM board:/ eth0: 1000Mbps full duplex link detected


Kind regards
Fabian

> Cheers,
> Ahmad