Thread (6 messages) 6 messages, 4 authors, 2016-05-31

Re: [PATCH] net: fec: dt: convert phy-reset-gpios to use GPIOD API

From: George G. Davis <hidden>
Date: 2016-05-31 18:33:08
Also in: linux-gpio, lkml, netdev

Hello Russell,

On Tue, May 31, 2016 at 07:26:42PM +0100, Russell King - ARM Linux wrote:
On Tue, May 31, 2016 at 02:24:50PM -0400, George G. Davis wrote:
quoted
Hello Fabio,

On Tue, May 31, 2016 at 02:26:54PM -0300, Fabio Estevam wrote:
quoted
On Tue, May 31, 2016 at 2:17 PM, George G. Davis
[off-list ref] wrote:
quoted
Convert the i.MX FEC driver and DT files to use the GPIOD API
which automatically handles GPIO polarity.

Signed-off-by: George G. Davis <redacted>
In order to avoid breaking old dtb's a property called
'phy-reset-active-high' has been introduced.

Check: 962d8cdc3133435a ("net: fec: Rename "phy-reset-active-low"
property") and 64f10f6ebf5a6d3ae ("net: fec: Add
"phy-reset-active-low" property to DT").
The GPIOD API handles GPIO active assertion levels as defined by the 
DT binding. So the phy-reset-active-high and/or phy-reset-active-low
property is not needed when using the GPIOD API - just define
GPIO_ACTIVE_LOW or GPIO_ACTIVE_HIGH as required for the board and the
GPIOD API will handle active assert/deassert level as needed.
You must retain compatibility with _existing_ DT files.  Hence,
while you can convert to using the gpiod API, you still need to
be compatible with the old way of specifying this - iow, you must
support the old properties in the code.
Sigh, thanks for the ClueBat. Got it. I'll rework the patch to retain
compatibility with existing DT files.

-- 
Regards,
George
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help