Re: [PATCH v3] Add support for GPIOs for SMSC LAN95xx chips.

From: Evgeny Boger <redacted>
Date: Thu,  9 Oct 2014 02:14:58 +0400

There might be 11 GPIOs in total.
Last three GPIOs  (offsets 8-10, 0-based) are shared with FDX, LNKA, SPD
LEDs respectively. The LEDs are driven by chip by default at startup time.
Once the corresponding GPIO is requested, the chip LED drive logic is disabled.

The numbering scheme according to datasheets differs a bit between LAN9500
and LAN951x.

For LAN951x:
GPIOs with offsets 0-7 are named "GPIO3" - "GPIO7",
offsets 8-10 are for "GPIO0" - "GPIO2" (these three are multiplexed with nFDX_LED,
nLNKA_LED, nSPD_LED).

For LAN9500:
The datasheet name is the same as the corresponding offset, i.e. offsets 0-10 are
for "GPIO0"-"GPIO10".

Signed-off-by: Evgeny Boger <redacted>

Please either "select GPIOLIB" from USB_NET_SMSC95XX, or add a new
config option "UBS_NET_SMSC95XX_GPIO" which does it.  I would prefer
the former, and then you can get rid of all of the ifdefs in your
patch.

Thanks.
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