[PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Corentin Labbe]

The driver expect "allwinner,leds-active-low" to be in PHY node, but
the binding doc expect it to be in MAC node.

Since all board DT use it also in MAC node, the driver need to search
allwinner,leds-active-low in MAC node.

Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index e5ff734d4f9b..9eb7f65d8000 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -808,8 +808,7 @@ static int sun8i_dwmac_set_syscon(struct stmmac_priv *priv)
 			 val, reg);
 
 	if (gmac->variant->soc_has_internal_phy) {
-		if (of_property_read_bool(priv->plat->phy_node,
-					  "allwinner,leds-active-low"))
+		if (of_property_read_bool(node, "allwinner,leds-active-low"))
 			reg |= H3_EPHY_LED_POL;
 		else
 			reg &= ~H3_EPHY_LED_POL;
-- 
2.13.6

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Andrew Lunn]

On Tue, Nov 28, 2017 at 05:48:22PM +0100, Corentin Labbe wrote:
> The driver expect "allwinner,leds-active-low" to be in PHY node, but
> the binding doc expect it to be in MAC node.
> 
> Since all board DT use it also in MAC node, the driver need to search
> allwinner,leds-active-low in MAC node.

Hi Corentin

I'm having trouble working out how this worked before. This is code
you moved around, when adding external/internal MDIOs. But the very
first version of this driver code used priv->plat->phy_node. Did that
somehow point to the MAC node when the internal PHY is used? Or has it
been broken all the time?

	Andrew

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Corentin Labbe]

On Tue, Nov 28, 2017 at 06:38:26PM +0100, Andrew Lunn wrote:
> On Tue, Nov 28, 2017 at 05:48:22PM +0100, Corentin Labbe wrote:
> > The driver expect "allwinner,leds-active-low" to be in PHY node, but
> > the binding doc expect it to be in MAC node.
> > 
> > Since all board DT use it also in MAC node, the driver need to search
> > allwinner,leds-active-low in MAC node.
> 
> Hi Corentin
> 
> I'm having trouble working out how this worked before. This is code
> you moved around, when adding external/internal MDIOs. But the very
> first version of this driver code used priv->plat->phy_node. Did that
> somehow point to the MAC node when the internal PHY is used? Or has it
> been broken all the time?
> 

Hello

Since this feature control only when the activity LED need to blink, nobody see that it was broken.
It is indepedant of other internal PHY stuff.

Regards

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Andrew Lunn]

On Wed, Nov 29, 2017 at 10:02:40AM +0100, Corentin Labbe wrote:
> On Tue, Nov 28, 2017 at 06:38:26PM +0100, Andrew Lunn wrote:
> > On Tue, Nov 28, 2017 at 05:48:22PM +0100, Corentin Labbe wrote:
> > > The driver expect "allwinner,leds-active-low" to be in PHY node, but
> > > the binding doc expect it to be in MAC node.
> > > 
> > > Since all board DT use it also in MAC node, the driver need to search
> > > allwinner,leds-active-low in MAC node.
> > 
> > Hi Corentin
> > 
> > I'm having trouble working out how this worked before. This is code
> > you moved around, when adding external/internal MDIOs. But the very
> > first version of this driver code used priv->plat->phy_node. Did that
> > somehow point to the MAC node when the internal PHY is used? Or has it
> > been broken all the time?
> > 
> 
> Hello
> 

> Since this feature control only when the activity LED need to blink,
> nobody see that it was broken.

Hi Corentin

So it never worked?

If it never worked, moving the DT properties into the PHY node, where
they belong, won't introduce a regression :-)

     Andrew

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Chen-Yu Tsai]

On Wed, Nov 29, 2017 at 11:37 PM, Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org> wrote:
> On Wed, Nov 29, 2017 at 10:02:40AM +0100, Corentin Labbe wrote:
>> On Tue, Nov 28, 2017 at 06:38:26PM +0100, Andrew Lunn wrote:
>> > On Tue, Nov 28, 2017 at 05:48:22PM +0100, Corentin Labbe wrote:
>> > > The driver expect "allwinner,leds-active-low" to be in PHY node, but
>> > > the binding doc expect it to be in MAC node.
>> > >
>> > > Since all board DT use it also in MAC node, the driver need to search
>> > > allwinner,leds-active-low in MAC node.
>> >
>> > Hi Corentin
>> >
>> > I'm having trouble working out how this worked before. This is code
>> > you moved around, when adding external/internal MDIOs. But the very
>> > first version of this driver code used priv->plat->phy_node. Did that
>> > somehow point to the MAC node when the internal PHY is used? Or has it
>> > been broken all the time?
>> >
>>
>> Hello
>>
>
>> Since this feature control only when the activity LED need to blink,
>> nobody see that it was broken.
>
> Hi Corentin
>
> So it never worked?
>
> If it never worked, moving the DT properties into the PHY node, where
> they belong, won't introduce a regression :-)

It worked at one point. During some previous iteration, they lit up as
they were supposed to.

ChenYu

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Andrew Lunn]

Hi ChenYu
 
> It worked at one point. During some previous iteration, they lit up as
> they were supposed to.

For a released version of the kernel? Or during development work?  If
they did work, but broken, it would be good to know which commit broke
it. We can then add a fixes: tag to the patch as proposed.

    Andrew

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1383 bytes --]

On Wed, Nov 29, 2017 at 04:37:12PM +0100, Andrew Lunn wrote:
> On Wed, Nov 29, 2017 at 10:02:40AM +0100, Corentin Labbe wrote:
> > On Tue, Nov 28, 2017 at 06:38:26PM +0100, Andrew Lunn wrote:
> > > On Tue, Nov 28, 2017 at 05:48:22PM +0100, Corentin Labbe wrote:
> > > > The driver expect "allwinner,leds-active-low" to be in PHY node, but
> > > > the binding doc expect it to be in MAC node.
> > > > 
> > > > Since all board DT use it also in MAC node, the driver need to search
> > > > allwinner,leds-active-low in MAC node.
> > > 
> > > Hi Corentin
> > > 
> > > I'm having trouble working out how this worked before. This is code
> > > you moved around, when adding external/internal MDIOs. But the very
> > > first version of this driver code used priv->plat->phy_node. Did that
> > > somehow point to the MAC node when the internal PHY is used? Or has it
> > > been broken all the time?
> > > 
> > 
> > Hello
> > 
> 
> > Since this feature control only when the activity LED need to blink,
> > nobody see that it was broken.
> 
> Hi Corentin
> 
> So it never worked?
> 
> If it never worked, moving the DT properties into the PHY node, where
> they belong, won't introduce a regression :-)

That's even truer since it's been queued for 4.15 which hasn't been
released yet.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[Chen-Yu Tsai]

On Wed, Nov 29, 2017 at 11:46 PM, Andrew Lunn <andrew-g2DYL2Zd6BY@public.gmane.org> wrote:
> Hi ChenYu
>
>> It worked at one point. During some previous iteration, they lit up as
>> they were supposed to.
>
> For a released version of the kernel? Or during development work?  If
> they did work, but broken, it would be good to know which commit broke
> it. We can then add a fixes: tag to the patch as proposed.

During development work. The bindings / driver was never released.

ChenYu

Re: [PATCH] net: stmmac: dwmac-sun8i: fix allwinner,leds-active-low handling

[David Miller]

From: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Tue, 28 Nov 2017 17:48:22 +0100

> The driver expect "allwinner,leds-active-low" to be in PHY node, but
> the binding doc expect it to be in MAC node.
> 
> Since all board DT use it also in MAC node, the driver need to search
> allwinner,leds-active-low in MAC node.
> 
> Signed-off-by: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

I've read over this discussion and I think the thing to do is for me
to simply apply this to 'net' for now.

Thanks.