[U-Boot] [PATCH V4] ARM: mx6: Add support for Kosagi Novena

[Nikolay Dimitrov <picmaster@mail.bg>]

Hi Marek,

Here are my last findings:

On 09/23/2014 01:18 PM, Marek Vasut wrote:
 > +static void novena_spl_setup_iomux_sdhc(void)
 > +{
 > +	imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
 > +	imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
 > +
 > +	/* Micro SD card detect */
 > +	gpio_direction_input(IMX_GPIO_NR(7, 0));
 > +
 > +	/* Big SD card detect */
 > +	gpio_direction_input(IMX_GPIO_NR(1, 4));
 > +}

I think that you mentioned elsewhere in the source, that microSD card 
doesn't have CD. Also, GPIO7_IO00 is not connected to anything.


 > +#define NOVENA_USB_HUB_RESET	IMX_GPIO_NR(7, 12)

Can you please double-check this one, it seems that GPIO7_IO12 is 
actually connected as PCIE_PWRON on the schematic.


 > +/*
 > + * USB
 > + */
 > +#ifdef CONFIG_USB_EHCI_MX6
 > +int board_ehci_hcd_init(int port)
 > +{
 > +	/* Reset USB hub */
 > +	if (port == 1) {
 > +		gpio_set_value(NOVENA_USB_HUB_RESET, 0);
 > +		mdelay(2);
 > +		gpio_set_value(NOVENA_USB_HUB_RESET, 1);
 > +	}
 > +	return 0;
 > +}
 > +#endif

Can you verify this - USB hubs seems to be reset not by this pin, but 
via RESETBMCU.


 > +#define NOVENA_AUDIO_PWRON		IMX_GPIO_NR(5, 17)

This signal is not connected to the audio power switch, because R30A is 
marked as DNP. The audio power switch seems to be controlled by 
KEY_ROW1, which is not configured by uboot, I think.


 > +#define NOVENA_HDMI_GHOST_HPD		IMX_GPIO_NR(5, 4)
...
 > +static void novena_spl_setup_iomux_video(void)
 > +{
 > +	imx_iomux_v3_setup_multiple_pads(hdmi_pads, ARRAY_SIZE(hdmi_pads));
 > +	gpio_direction_input(NOVENA_HDMI_GHOST_HPD);
 > +}

Is there any added value of having this pin initialized? It should be 
already configured as input on reset.


 > + * Environment is on MMC, starting at offset 64KiB from start of the 
card.
...
 > +#define CONFIG_ENV_OFFSET		(512 * 1024)

Comments and code say different things about the ENV offset - which one 
is the correct value?


I don't have any more comments on v4. Sorry it took so long, but it 
takes ages to cross-check the code, schematic and datasheets, you 
know... Thanks for your patience. Please tell me if I can help more.

Kind regards,
Nikolay