[PATCH] ARM: boards: Add support for todarex colibri imx6 on iris

[Sascha Hauer]

On Mon, Dec 16, 2024 at 09:55:47AM +0100, Ahmad Fatoum wrote:
> Hello Sascha,
> 
> On 16.12.24 09:18, Sascha Hauer wrote:
> > Hi Jonas,
> > 
> > On Fri, Dec 13, 2024 at 03:06:59PM +0100, Jonas Rebmann wrote:
> >> +static void eth_init(void)
> >> +{
> >> +        void __iomem *iomux = (void *)MX6_IOMUXC_BASE_ADDR;
> > 
> > IOMEM() instead of casting to void *.
> > 
> >> +ENTRY_FUNCTION(start_imx6dl_colibri_iris, r0, r1, r2)
> >> +{
> >> +	void *fdt;
> >> +
> >> +	imx6_cpu_lowlevel_init();
> >> +
> >> +	if (IS_ENABLED(CONFIG_DEBUG_LL)) {
> >> +		setup_uart();
> >> +	}
> >> +
> >> +	fdt = __dtb_z_imx6dl_colibri_iris_start + get_runtime_offset();
> >> +	barebox_arm_entry(0x10000000, SZ_512M, fdt);
> >> +}
> > 
> > Rather do a:
> > 
> > 	relocate_to_current_adr();
> > 	setup_c();
> > 
> > Then jump to a noinline function to continue startup.
> > 
> > Additionally to setting up the UART for _ll access you can do
> > a
> > 
> > 	pbl_set_putc(imx_uart_putc, uart1base);
> > 
> > The advantage is that you no longer have to enable CONFIG_DEBUG_LL to
> > get early console output, but only CONFIG_PBL_CONSOLE.
> > 
> > You can do the UART setup unconditionally, no need to hide that behind
> > CONFIG_DEBUG_LL.
> 
> By using the DCD table, the benefit of the console so early is greatly
> reduced, that's why I told Jonas that DEBUG_LL would be enough.

Ok. Nevertheless the IS_ENABLED(CONFIG_DEBUG_LL) can be removed.

> 
> > 
> >> +
> >> +ENTRY_FUNCTION(start_imx6s_colibri_iris, r0, r1, r2)
> >> +{
> >> +	void *fdt;
> >> +
> >> +	imx6_cpu_lowlevel_init();
> >> +
> >> +	if (IS_ENABLED(CONFIG_DEBUG_LL)) {
> >> +		setup_uart();
> >> +	}
> >> +
> >> +	fdt = __dtb_z_imx6dl_colibri_iris_start + get_runtime_offset();
> >> +	barebox_arm_entry(0x10000000, SZ_256M, fdt);
> >> +}
> > 
> > You should be able to call imx6q_barebox_entry() instead here. This
> > will read the amount of DRAM back from the controller. No need to
> > distinguish between both board anymore and you can merge both images
> > into one.
> 
> The images have different DCD tables, so combining the entry point
> won't work. You can't have different imxcfg files for a single entry point.

Ah, right. Would __alias work for ENTRY_FUNCTION?

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |