Re: [PATCH] Allow MUSB DSPS to use "force host" mode

[Michael Grzeschik <mgr@pengutronix.de>]

Hallo,

On Fri, Nov 22, 2013 at 03:55:59PM +0000, Mark Jackson wrote:
> The IDDIG input pin is normally used to determine the USB mode
> (i.e. HOST or DEVICE).
> 
> On some systems (e.g. AM335x) leaving this pin floating allows
> the USB mode to be set via software.
> 
> This patch adds support for this via the device tree.
> 
> Signed-off-by: Mark Jackson <mpfj@newflow.co.uk>
> ---
>  .../devicetree/bindings/usb/am33xx-usb.txt         |    2 ++
>  drivers/usb/musb/musb_dsps.c                       |   14 ++++++++++++++
>  include/linux/usb/musb.h                           |    1 +
>  3 files changed, 17 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/am33xx-usb.txt b/Documentation/devicetree/bindings/usb/am33xx-usb.txt
> index 20c2ff2..560b7ff 100644
> --- a/Documentation/devicetree/bindings/usb/am33xx-usb.txt
> +++ b/Documentation/devicetree/bindings/usb/am33xx-usb.txt
> @@ -47,6 +47,8 @@ USB
>  - dmas: specifies the dma channels
>  - dma-names: specifies the names of the channels. Use "rxN" for receive
>    and "txN" for transmit endpoints. N specifies the endpoint number.
> +- ti,force-host: specifies that the IDDIG input be ignored and the device be
> +  put into host mode regardless.

You should always CC devicetree-discuss if adding new bindings. Why
another binding anyway? We have the common binding dr_mode already.
Please use this and of_usb_get_dr_mode from drivers/usb/usb-common.c
instead.

Thanks,
Michael
-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |