Hi,
On 19-01-15 12:50, Marco Felsch wrote:
> The HW can swap the USB differential-pair (D+/D-) for each port
> separately. So the USB signals can be re-aligned with a misplaced
> USB connector on the PCB.
>
> Signed-off-by: Marco Felsch <m.fel...@pengutronix.de>
> ---
> Changes:
> v2:
> - rename property s/sw-dx-lanes-ports/swap-dx-lanes
> - add commentar for future users
>
> drivers/usb/misc/usb251xb.c | 15 +++++++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
> index a6efb9a72939..ec649046688d 100644
> --- a/drivers/usb/misc/usb251xb.c
> +++ b/drivers/usb/misc/usb251xb.c
> @@ -337,10 +337,12 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
> struct device *dev = hub->dev;
> struct device_node *np = dev->of_node;
> int len, err, i;
> - u32 property_u32 = 0;
> + u32 port, property_u32 = 0;
> const u32 *cproperty_u32;
> const char *cproperty_char;
> char str[USB251XB_STRING_BUFSIZE / 2];
> + struct property *prop;
> + const __be32 *p;
>
> if (!np) {
> dev_err(dev, "failed to get ofdata\n");
> @@ -539,6 +541,16 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
> (wchar_t *)hub->serial,
> USB251XB_STRING_BUFSIZE);
>
> + /*
> + * The datasheet documents the register as 'Port Swap' but the register
> + * controls the USB DP/DM signal swapping
> + */
Sorry for the noise, unfortunately I forgot to update the patch..
Richard can you fix the commentar inline to:
8<----------------------------------------------------------------------------
+ /*
+ * The datasheet documents the register as 'Port Swap' but in real the
+ * register controls the USB DP/DM signal swapping for each port.
+ */
8<----------------------------------------------------------------------------
> + hub->port_swap = USB251XB_DEF_PORT_SWAP;
> + of_property_for_each_u32(np, "swap-dx-lanes", prop, p, port) {
> + if ((port >= 0) && (port <= data->port_cnt))
> + hub->port_swap |= BIT(port);
> + }
> +
> /* The following parameters are currently not exposed to devicetree, but
> * may be as soon as needed.
> */
> @@ -546,7 +558,6 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
> hub->boost_up = USB251XB_DEF_BOOST_UP;
> hub->boost_57 = USB251XB_DEF_BOOST_57;
> hub->boost_14 = USB251XB_DEF_BOOST_14;
> - hub->port_swap = USB251XB_DEF_PORT_SWAP;
> hub->port_map12 = USB251XB_DEF_PORT_MAP_12;
> hub->port_map34 = USB251XB_DEF_PORT_MAP_34;
> hub->port_map56 = USB251XB_DEF_PORT_MAP_56;
> --
> 2.20.1
>
>
>
--
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