[U-Boot] [PATCH 6/6] i.mx: i.mx6q: Add the initial support for i.mx6q ARM2 board

[Stefano Babic <sbabic@denx.de>]

On 11/12/2011 11:36 AM, Jason Liu wrote:
> Add the initial support for Freescale i.MX6Q Armadillo2 board
> Support: MMC boot from slot 0/1, debug UART(UART4), usdhc.
> 
> Signed-off-by: Jason Liu <jason.hui@linaro.org>

Hi Jason,

is mx6qarm2 the official Freescale name ?

> +#ifdef CONFIG_FSL_ESDHC
> +struct fsl_esdhc_cfg usdhc_cfg[2] = {
> +	{USDHC3_BASE_ADDR, 1},
> +	{USDHC4_BASE_ADDR, 1},
> +};
> +
> +int board_mmc_getcd(u8 *cd, struct mmc *mmc)
> +{
> +	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
> +
> +	if (cfg->esdhc_base == USDHC3_BASE_ADDR)
> +		*cd = gpio_get_value(107); /*GPIO6_11*/
> +	else /* Don't have the CD GPIO pin on board */
> +		*cd = 0;

Is it the logic inverted ? If you return always zero, there is no Card
in the slot for the MMC framework and there is no attempt to read it. It
is working on USDHC4 ?

> +int board_early_init_f(void)
> +{
> +	imx_iomux_v3_init((void *)IOMUXC_BASE_ADDR);
> +	setup_iomux_uart();
> +
> +	return 0;
> +}
> +
> +int board_init(void)
> +{
> +	/* board id for linux */
> +	gd->bd->bi_arch_number = MACH_TYPE_MX61_ARD;

You should only set CONFIG_MACH_TYPE mx6qarm2.h and drop this line. The
set is done in common code.

> +	/* address of boot parameters */
> +	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
> +
> +	/*
> +	 * Need re-initialization again since base is in BSS
> +	 * After relocation, base will be clear to zero.
> +	 */
> +	imx_iomux_v3_init((void *)IOMUXC_BASE_ADDR);

However, this is a trick. As general rule, we must not use BSS before
relocation. Is there no other way to do this ?

> +
> +#undef CONFIG_CMD_IMLS
> +#undef CONFIG_CMD_NET
> +#undef CONFIG_CMD_NFS
> +
> +#define CONFIG_BOOTDELAY		3
> +
> +#define CONFIG_PRIME			"FEC0"

Ethernet is not yet working, right ? How many Ethernet has this board ?

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================