[U-Boot] [PATCH 1/5] imx:mx6sxsabresd add usb support

[Peng Fan]

Hi,

在 11/3/2014 8:28 PM, Stefano Babic 写道:
> Hi Peng,
>
> On 01/11/2014 03:19, Peng Fan wrote:
>> Add usb support for mx6sxsabresd board.
>>
>> Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
>> Signed-off-by: Ye.Li <B37916 at freescale.com>
>> ---
>>   board/freescale/mx6sxsabresd/mx6sxsabresd.c | 29 +++++++++++++++++++++++++++++
>>   include/configs/mx6sxsabresd.h              | 14 ++++++++++++++
>>   2 files changed, 43 insertions(+)
>>
>> diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
>> index 256ea29..016b8e8 100644
>> --- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
>> +++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
>> @@ -296,3 +296,32 @@ int checkboard(void)
>>
>>   	return 0;
>>   }
>> +
>> +#ifdef CONFIG_USB_EHCI_MX6
>> +iomux_v3_cfg_t const usb_otg1_pads[] = {
>> +	MX6_PAD_GPIO1_IO09__USB_OTG1_PWR | MUX_PAD_CTRL(NO_PAD_CTRL),
>> +	MX6_PAD_GPIO1_IO10__ANATOP_OTG1_ID | MUX_PAD_CTRL(NO_PAD_CTRL)
>> +};
>> +
>> +iomux_v3_cfg_t const usb_otg2_pads[] = {
>> +	MX6_PAD_GPIO1_IO12__USB_OTG2_PWR | MUX_PAD_CTRL(NO_PAD_CTRL),
>> +};
>> +
>> +int board_ehci_hcd_init(int port)
>> +{
>> +	switch (port) {
>> +	case 0:
>> +		imx_iomux_v3_setup_multiple_pads(usb_otg1_pads,
>> +						 ARRAY_SIZE(usb_otg1_pads));
>> +		break;
>> +	case 1:
>> +		imx_iomux_v3_setup_multiple_pads(usb_otg2_pads,
>> +						 ARRAY_SIZE(usb_otg2_pads));
>> +		break;
>> +	default:
>> +		printf("MXC USB port %d not yet supported\n", port);
>> +		return 1;
>> +	}
>> +	return 0;
>> +}
>> +#endif
>
> Frankly, I am expecting that this function power up the bus instead of
> pin multiplexing. If the pins are reserved for USB, why should we set
> the pinmux each time board_ehci_hcd_init() is called ? And, in any case,
> pins are not reset after their usage for USB. You can move this setup in
> board_init() or in another init function.

Because otg power problem which is pointed out by Ye Li, I'll do power 
enable/disable in board_ehci_power function and move the pin settings to 
board_init.
And sent patch v2.

Thanks,
Peng.
>
> Best regards,
> Stefano Babic
>