[PATCH 0/11] ibm_newemac: Candidate patches for 2.6.25

[PATCH 0/11] ibm_newemac: Candidate patches for 2.6.25

[Benjamin Herrenschmidt]

Here are the patches I have pending for EMAC. With those, along with
some other powerpc patches scheduled for 2.6.25 for adding support
for those various boards, I have EMAC now working properly on a
variety of platforms, such as Taishan (440GX), Katmai (440SP),
EP405 (405GP), Bamboo (440EP), etc...

This serie apply on top of the patch:

"ibm_newemac: Fix possible lockup on close"

Which should be on its way to 2.6.24 already.

[PATCH 1/11] ibm_newemac: Add BCM5248 and Marvell 88E1111 PHY support

[Benjamin Herrenschmidt]

From: Stefan Roese <sr@denx.de>

This patch adds BCM5248 and Marvell 88E1111 PHY support to NEW EMAC driver.
These PHY chips are used on PowerPC 440EPx boards.
The PHY code is based on the previous work by Stefan Roese <sr@denx.de>

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

--- linux.orig/drivers/net/ibm_newemac/phy.c	2007-06-15 21:45:18.000000000 +0400
+++ linux/drivers/net/ibm_newemac/phy.c	2007-06-15 20:45:15.000000000 +0400
@@ -306,8 +306,47 @@
 	.ops		= &cis8201_phy_ops
 };
 
+static struct mii_phy_def bcm5248_phy_def = {
+
+	.phy_id		= 0x0143bc00,
+	.phy_id_mask	= 0x0ffffff0,
+	.name		= "BCM5248 10/100 SMII Ethernet",
+	.ops		= &generic_phy_ops
+};
+
+static int m88e1111_init(struct mii_phy *phy)
+{
+	printk("%s: Marvell 88E1111 Ethernet\n", __FUNCTION__);
+	phy_write(phy, 0x14, 0x0ce3);
+	phy_write(phy, 0x18, 0x4101);
+	phy_write(phy, 0x09, 0x0e00);
+	phy_write(phy, 0x04, 0x01e1);
+	phy_write(phy, 0x00, 0x9140);
+	phy_write(phy, 0x00, 0x1140);
+
+	return  0;
+}
+
+static struct mii_phy_ops m88e1111_phy_ops = {
+	.init		= m88e1111_init,
+	.setup_aneg	= genmii_setup_aneg,
+	.setup_forced	= genmii_setup_forced,
+	.poll_link	= genmii_poll_link,
+	.read_link	= genmii_read_link
+};
+
+static struct mii_phy_def m88e1111_phy_def = {
+
+	.phy_id		= 0x01410CC0,
+	.phy_id_mask	= 0x0ffffff0,
+	.name		= "Marvell 88E1111 Ethernet",
+	.ops		= &m88e1111_phy_ops,
+};
+
 static struct mii_phy_def *mii_phy_table[] = {
 	&cis8201_phy_def,
+	&bcm5248_phy_def,
+	&m88e1111_phy_def,
 	&genmii_phy_def,
 	NULL
 };
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Re: [PATCH 1/11] ibm_newemac: Add BCM5248 and Marvell 88E1111 PHY support

[Christoph Hellwig]

On Fri, Nov 30, 2007 at 04:40:23PM +1100, Benjamin Herrenschmidt wrote:
> From: Stefan Roese <sr@denx.de>
> 
> This patch adds BCM5248 and Marvell 88E1111 PHY support to NEW EMAC driver.
> These PHY chips are used on PowerPC 440EPx boards.
> The PHY code is based on the previous work by Stefan Roese <sr@denx.de>

Is there a reason the emac driver isn't using the generic phy code?

Re: [PATCH 1/11] ibm_newemac: Add BCM5248 and Marvell 88E1111 PHY support

[Benjamin Herrenschmidt]

On Fri, 2007-11-30 at 07:56 +0000, Christoph Hellwig wrote:
> > 
> > This patch adds BCM5248 and Marvell 88E1111 PHY support to NEW EMAC
> driver.
> > These PHY chips are used on PowerPC 440EPx boards.
> > The PHY code is based on the previous work by Stefan Roese
> <sr@denx.de>
> 
> Is there a reason the emac driver isn't using the generic phy code?

Yes. First, the emac PHY code predates the generic one, and mostly,
in its current shape, the generic PHY code does too violent locking
for me.

I need to be able to use mutexes in the low level PHY read/write, and
the current phylib doesn't allow that as it uses spinlocks all over.

However, I do plan to fix that. I haven't had time yet, but I plan to
convert PHY lib to more task-level operations, which would be a good
thing anyway since PHY communication is fairly slow and some chips can
do it interrupt driven rather than polling loops (and even polling loops
could be preemptible).

So the answer is "not yet" basically.

Cheers,
Ben.

Re: [PATCH 1/11] ibm_newemac: Add BCM5248 and Marvell 88E1111 PHY support

[Olof Johansson]

Hi,

On Fri, Nov 30, 2007 at 04:40:23PM +1100, Benjamin Herrenschmidt wrote:

> +static int m88e1111_init(struct mii_phy *phy)
> +{
> +	printk("%s: Marvell 88E1111 Ethernet\n", __FUNCTION__);

KERN_ level?


-Olof

Re: [PATCH 1/11] ibm_newemac: Add BCM5248 and Marvell 88E1111 PHY support

[Geert Uytterhoeven]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 865 bytes --]

On Fri, 30 Nov 2007, Olof Johansson wrote:
> On Fri, Nov 30, 2007 at 04:40:23PM +1100, Benjamin Herrenschmidt wrote:
> 
> > +static int m88e1111_init(struct mii_phy *phy)
> > +{
> > +	printk("%s: Marvell 88E1111 Ethernet\n", __FUNCTION__);
> 
> KERN_ level?

pr_

With kind regards,
 
Geert Uytterhoeven
Software Architect

Sony Network and Software Technology Center Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium
 
Phone:    +32 (0)2 700 8453	
Fax:      +32 (0)2 700 8622	
E-mail:   Geert.Uytterhoeven@sonycom.com	
Internet: http://www.sony-europe.com/
 	
Sony Network and Software Technology Center Europe	
A division of Sony Service Centre (Europe) N.V.	
Registered office: Technologielaan 7 · B-1840 Londerzeel · Belgium	
VAT BE 0413.825.160 · RPR Brussels	
Fortis Bank Zaventem · Swift GEBABEBB08A · IBAN BE39001382358619

[PATCH 2/11] ibm_newemac: Add ET1011c PHY support

[Benjamin Herrenschmidt]

From: Stefan Roese <sr@denx.de>

This adds support for the Agere ET1011c PHY as found on the AMCC Taishan
board.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

 drivers/net/ibm_newemac/phy.c |   37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

Index: linux-work/drivers/net/ibm_newemac/phy.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/phy.c	2007-11-08 18:54:12.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/phy.c	2007-11-08 18:54:13.000000000 +1100
@@ -327,6 +327,42 @@ static int m88e1111_init(struct mii_phy 
 	return  0;
 }
 
+static int et1011c_init(struct mii_phy *phy)
+{
+        u16 reg_short;
+
+        reg_short = (u16)(phy_read(phy,0x16));
+        reg_short &= ~(0x7);
+        reg_short |= 0x6;       /* RGMII Trace Delay*/
+        phy_write(phy, 0x16, reg_short);
+
+        reg_short = (u16)(phy_read(phy, 0x17));
+        reg_short &= ~(0x40);
+        phy_write(phy, 0x17, reg_short);
+
+        phy_write(phy,0x1c,0x74f0);
+        return 0;
+}
+
+static struct mii_phy_ops et1011c_phy_ops = {
+        .init           = et1011c_init,
+        .setup_aneg     = genmii_setup_aneg,
+        .setup_forced   = genmii_setup_forced,
+        .poll_link      = genmii_poll_link,
+        .read_link      = genmii_read_link
+};
+
+static struct mii_phy_def et1011c_phy_def = {
+        .phy_id         = 0x0282f000,
+        .phy_id_mask    = 0x0fffff00,
+        .name           = "ET1011C Gigabit Ethernet",
+        .ops            = &et1011c_phy_ops
+};
+
+
+
+
+
 static struct mii_phy_ops m88e1111_phy_ops = {
 	.init		= m88e1111_init,
 	.setup_aneg	= genmii_setup_aneg,
@@ -344,6 +380,7 @@ static struct mii_phy_def m88e1111_phy_d
 };
 
 static struct mii_phy_def *mii_phy_table[] = {
+	&et1011c_phy_def,
 	&cis8201_phy_def,
 	&bcm5248_phy_def,
 	&m88e1111_phy_def,

Re: [PATCH 2/11] ibm_newemac: Add ET1011c PHY support

[Olof Johansson]

Hi,

On Fri, Nov 30, 2007 at 04:40:24PM +1100, Benjamin Herrenschmidt wrote:

> This adds support for the Agere ET1011c PHY as found on the AMCC Taishan
> board.

The whole patch has whitespace messed up (tabs vs spaces).


-Olof

Re: [PATCH 2/11] ibm_newemac: Add ET1011c PHY support

[Benjamin Herrenschmidt]

On Fri, 2007-11-30 at 08:29 -0600, Olof Johansson wrote:
> Hi,
> 
> On Fri, Nov 30, 2007 at 04:40:24PM +1100, Benjamin Herrenschmidt wrote:
> 
> > This adds support for the Agere ET1011c PHY as found on the AMCC Taishan
> > board.
> 
> The whole patch has whitespace messed up (tabs vs spaces).

Thanks for noticing it on the ...3rd time those are sent to the list...

Ben.

Re: [PATCH 2/11] ibm_newemac: Add ET1011c PHY support

[Olof Johansson]

On Sat, Dec 01, 2007 at 07:59:16AM +1100, Benjamin Herrenschmidt wrote:
> 
> On Fri, 2007-11-30 at 08:29 -0600, Olof Johansson wrote:
> > Hi,
> > 
> > On Fri, Nov 30, 2007 at 04:40:24PM +1100, Benjamin Herrenschmidt wrote:
> > 
> > > This adds support for the Agere ET1011c PHY as found on the AMCC Taishan
> > > board.
> > 
> > The whole patch has whitespace messed up (tabs vs spaces).
> 
> Thanks for noticing it on the ...3rd time those are sent to the list...

Yeah, sorry about that. Should have caught it sooner.

Anyway, can be fixed up with incremental patch, doesn't need to hold up
the whole series.


-Olof

Re: [PATCH 2/11] ibm_newemac: Add ET1011c PHY support

[Kumar Gala]

On Nov 30, 2007, at 2:59 PM, Benjamin Herrenschmidt wrote:

>
> On Fri, 2007-11-30 at 08:29 -0600, Olof Johansson wrote:
>> Hi,
>>
>> On Fri, Nov 30, 2007 at 04:40:24PM +1100, Benjamin Herrenschmidt  
>> wrote:
>>
>>> This adds support for the Agere ET1011c PHY as found on the AMCC  
>>> Taishan
>>> board.
>>
>> The whole patch has whitespace messed up (tabs vs spaces).
>
> Thanks for noticing it on the ...3rd time those are sent to the  
> list...

Clearly if you used checkpatch.pl you'd have noticed this by now. :)

- k

[PATCH 3/11] ibm_newemac: Fix ZMII refcounting bug

[Benjamin Herrenschmidt]

When using ZMII for MDIO only (such as 440GX with RGMII for data and ZMII for
MDIO), the ZMII code would fail to properly refcount, thus triggering a
BUG_ON().

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
---

 drivers/net/ibm_newemac/zmii.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-work/drivers/net/ibm_newemac/zmii.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/zmii.c	2007-11-08 15:45:32.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/zmii.c	2007-11-08 15:46:21.000000000 +1100
@@ -83,12 +83,14 @@ int __devinit zmii_attach(struct of_devi
 
 	ZMII_DBG(dev, "init(%d, %d)" NL, input, *mode);
 
-	if (!zmii_valid_mode(*mode))
+	if (!zmii_valid_mode(*mode)) {
 		/* Probably an EMAC connected to RGMII,
 		 * but it still may need ZMII for MDIO so
 		 * we don't fail here.
 		 */
+		dev->users++;
 		return 0;
+	}
 
 	mutex_lock(&dev->lock);
 

[PATCH 4/11] ibm_newemac: Workaround reset timeout when no link

[Benjamin Herrenschmidt]

With some PHYs, when the link goes away, the EMAC reset fails due
to the loss of the RX clock I believe.

The old EMAC driver worked around that using some internal chip-specific
clock force bits that are different on various 44x implementations.

This is an attempt at doing it differently, by avoiding the reset when
there is no link, but forcing loopback mode instead. It seems to work
on my Taishan 440GX based board so far.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
---

 drivers/net/ibm_newemac/core.c |   20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

Index: linux-work/drivers/net/ibm_newemac/core.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.c	2007-11-20 14:46:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.c	2007-11-20 14:46:58.000000000 +1100
@@ -464,26 +464,34 @@ static int emac_configure(struct emac_in
 {
 	struct emac_regs __iomem *p = dev->emacp;
 	struct net_device *ndev = dev->ndev;
-	int tx_size, rx_size;
+	int tx_size, rx_size, link = netif_carrier_ok(dev->ndev);
 	u32 r, mr1 = 0;
 
 	DBG(dev, "configure" NL);
 
-	if (emac_reset(dev) < 0)
+	if (!link) {
+		out_be32(&p->mr1, in_be32(&p->mr1)
+			 | EMAC_MR1_FDE | EMAC_MR1_ILE);
+		udelay(100);
+	} else if (emac_reset(dev) < 0)
 		return -ETIMEDOUT;
 
 	if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
 		tah_reset(dev->tah_dev);
 
-	DBG(dev, " duplex = %d, pause = %d, asym_pause = %d\n",
-	    dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
+	DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n",
+	    link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause);
 
 	/* Default fifo sizes */
 	tx_size = dev->tx_fifo_size;
 	rx_size = dev->rx_fifo_size;
 
+	/* No link, force loopback */
+	if (!link)
+		mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE;
+
 	/* Check for full duplex */
-	if (dev->phy.duplex == DUPLEX_FULL)
+	else if (dev->phy.duplex == DUPLEX_FULL)
 		mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001;
 
 	/* Adjust fifo sizes, mr1 and timeouts based on link speed */
@@ -1165,9 +1173,9 @@ static void emac_link_timer(struct work_
 		link_poll_interval = PHY_POLL_LINK_ON;
 	} else {
 		if (netif_carrier_ok(dev->ndev)) {
-			emac_reinitialize(dev);
 			netif_carrier_off(dev->ndev);
 			netif_tx_disable(dev->ndev);
+			emac_reinitialize(dev);
 			emac_print_link_status(dev);
 		}
 		link_poll_interval = PHY_POLL_LINK_OFF;

[PATCH 5/11] ibm_newemac: Cleanup/Fix RGMII MDIO support detection

[Benjamin Herrenschmidt]

More than just "AXON" version of EMAC RGMII supports MDIO, so replace
the current test with a generic property in the device-tree that
indicates such support.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
---

 arch/powerpc/boot/dts/sequoia.dts |    1 +
 drivers/net/ibm_newemac/rgmii.c   |   20 +++++++++++---------
 drivers/net/ibm_newemac/rgmii.h   |    5 +++--
 3 files changed, 15 insertions(+), 11 deletions(-)

Index: linux-work/drivers/net/ibm_newemac/rgmii.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/rgmii.c	2007-11-12 10:55:54.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/rgmii.c	2007-11-12 10:56:56.000000000 +1100
@@ -140,7 +140,7 @@ void rgmii_get_mdio(struct of_device *of
 
 	RGMII_DBG2(dev, "get_mdio(%d)" NL, input);
 
-	if (dev->type != RGMII_AXON)
+	if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO))
 		return;
 
 	mutex_lock(&dev->lock);
@@ -161,7 +161,7 @@ void rgmii_put_mdio(struct of_device *of
 
 	RGMII_DBG2(dev, "put_mdio(%d)" NL, input);
 
-	if (dev->type != RGMII_AXON)
+	if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO))
 		return;
 
 	fer = in_be32(&p->fer);
@@ -250,11 +250,13 @@ static int __devinit rgmii_probe(struct 
 		goto err_free;
 	}
 
-	/* Check for RGMII type */
+	/* Check for RGMII flags */
+	if (of_get_property(ofdev->node, "has-mdio", NULL))
+		dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO;
+
+	/* CAB lacks the right properties, fix this up */
 	if (of_device_is_compatible(ofdev->node, "ibm,rgmii-axon"))
-		dev->type = RGMII_AXON;
-	else
-		dev->type = RGMII_STANDARD;
+		dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO;
 
 	DBG2(dev, " Boot FER = 0x%08x, SSR = 0x%08x\n",
 	     in_be32(&dev->base->fer), in_be32(&dev->base->ssr));
@@ -263,9 +265,9 @@ static int __devinit rgmii_probe(struct 
 	out_be32(&dev->base->fer, 0);
 
 	printk(KERN_INFO
-	       "RGMII %s %s initialized\n",
-	       dev->type == RGMII_STANDARD ? "standard" : "axon",
-	       ofdev->node->full_name);
+	       "RGMII %s initialized with%s MDIO support\n",
+	       ofdev->node->full_name,
+	       (dev->flags & EMAC_RGMII_FLAG_HAS_MDIO) ? "" : "out");
 
 	wmb();
 	dev_set_drvdata(&ofdev->dev, dev);
Index: linux-work/drivers/net/ibm_newemac/rgmii.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/rgmii.h	2007-11-12 10:55:54.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/rgmii.h	2007-11-12 10:56:56.000000000 +1100
@@ -35,8 +35,9 @@ struct rgmii_regs {
 struct rgmii_instance {
 	struct rgmii_regs __iomem	*base;
 
-	/* Type of RGMII bridge */
-	int				type;
+	/* RGMII bridge flags */
+	int				flags;
+#define EMAC_RGMII_FLAG_HAS_MDIO	0x00000001
 
 	/* Only one EMAC whacks us at a time */
 	struct mutex			lock;
Index: linux-work/arch/powerpc/boot/dts/sequoia.dts
===================================================================
--- linux-work.orig/arch/powerpc/boot/dts/sequoia.dts	2007-11-12 10:58:38.000000000 +1100
+++ linux-work/arch/powerpc/boot/dts/sequoia.dts	2007-11-12 10:58:47.000000000 +1100
@@ -245,6 +245,7 @@
 				device_type = "rgmii-interface";
 				compatible = "ibm,rgmii-440epx", "ibm,rgmii";
 				reg = <ef601000 8>;
+				has-mdio;
 			};
 
 			EMAC0: ethernet@ef600e00 {

[PATCH 6/11] ibm_newemac: Cleanup/fix support for STACR register variants

[Benjamin Herrenschmidt]

There are a few variants of the STACR register that affect more than
just the "AXON" version of EMAC. Replace the current test of various
chip models with tests for generic properties in the device-tree.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
---

 arch/powerpc/boot/dts/sequoia.dts |    4 ++++
 drivers/net/ibm_newemac/core.c    |   23 +++++++++++++----------
 drivers/net/ibm_newemac/core.h    |    6 +++---
 3 files changed, 20 insertions(+), 13 deletions(-)

Index: linux-work/arch/powerpc/boot/dts/sequoia.dts
===================================================================
--- linux-work.orig/arch/powerpc/boot/dts/sequoia.dts	2007-11-20 14:47:01.000000000 +1100
+++ linux-work/arch/powerpc/boot/dts/sequoia.dts	2007-11-20 14:47:02.000000000 +1100
@@ -274,6 +274,8 @@
 				zmii-channel = <0>;
 				rgmii-device = <&RGMII0>;
 				rgmii-channel = <0>;
+				has-inverted-stacr-oc;
+				has-new-stacr-staopc;
 			};
 
 			EMAC1: ethernet@ef600f00 {
@@ -302,6 +304,8 @@
 				zmii-channel = <1>;
 				rgmii-device = <&RGMII0>;
 				rgmii-channel = <1>;
+				has-inverted-stacr-oc;
+				has-new-stacr-staopc;
 			};
 		};
 	};
Index: linux-work/drivers/net/ibm_newemac/core.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.c	2007-11-20 14:46:58.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.c	2007-11-20 14:47:02.000000000 +1100
@@ -711,7 +711,7 @@ static int __emac_mdio_read(struct emac_
 		r = EMAC_STACR_BASE(dev->opb_bus_freq);
 	if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
 		r |= EMAC_STACR_OC;
-	if (emac_has_feature(dev, EMAC_FTR_HAS_AXON_STACR))
+	if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
 		r |= EMACX_STACR_STAC_READ;
 	else
 		r |= EMAC_STACR_STAC_READ;
@@ -783,7 +783,7 @@ static void __emac_mdio_write(struct ema
 		r = EMAC_STACR_BASE(dev->opb_bus_freq);
 	if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT))
 		r |= EMAC_STACR_OC;
-	if (emac_has_feature(dev, EMAC_FTR_HAS_AXON_STACR))
+	if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR))
 		r |= EMACX_STACR_STAC_WRITE;
 	else
 		r |= EMAC_STACR_STAC_WRITE;
@@ -2480,16 +2480,19 @@ static int __devinit emac_init_config(st
 	/* Check EMAC version */
 	if (of_device_is_compatible(np, "ibm,emac4"))
 		dev->features |= EMAC_FTR_EMAC4;
-	if (of_device_is_compatible(np, "ibm,emac-axon")
-	    || of_device_is_compatible(np, "ibm,emac-440epx"))
-		dev->features |= EMAC_FTR_HAS_AXON_STACR
-			| EMAC_FTR_STACR_OC_INVERT;
-	if (of_device_is_compatible(np, "ibm,emac-440spe"))
+
+	/* Fixup some feature bits based on the device tree */
+	if (of_get_property(np, "has-inverted-stacr-oc", NULL))
 		dev->features |= EMAC_FTR_STACR_OC_INVERT;
+	if (of_get_property(np, "has-new-stacr-staopc", NULL))
+		dev->features |= EMAC_FTR_HAS_NEW_STACR;
 
-	/* Fixup some feature bits based on the device tree and verify
-	 * we have support for them compiled in
-	 */
+	/* CAB lacks the appropriate properties */
+	if (of_device_is_compatible(np, "ibm,emac-axon"))
+		dev->features |= EMAC_FTR_HAS_NEW_STACR |
+			EMAC_FTR_STACR_OC_INVERT;
+
+	/* Enable TAH/ZMII/RGMII features as found */
 	if (dev->tah_ph != 0) {
 #ifdef CONFIG_IBM_NEW_EMAC_TAH
 		dev->features |= EMAC_FTR_HAS_TAH;
Index: linux-work/drivers/net/ibm_newemac/core.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.h	2007-11-20 14:46:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.h	2007-11-20 14:47:02.000000000 +1100
@@ -293,9 +293,9 @@ struct emac_instance {
  */
 #define EMAC_FTR_HAS_RGMII		0x00000020
 /*
- * Set if we have axon-type STACR
+ * Set if we have new type STACR with STAOPC
  */
-#define EMAC_FTR_HAS_AXON_STACR		0x00000040
+#define EMAC_FTR_HAS_NEW_STACR		0x00000040
 
 
 /* Right now, we don't quite handle the always/possible masks on the
@@ -307,7 +307,7 @@ enum {
 
 	EMAC_FTRS_POSSIBLE	=
 #ifdef CONFIG_IBM_NEW_EMAC_EMAC4
-	    EMAC_FTR_EMAC4	| EMAC_FTR_HAS_AXON_STACR	|
+	    EMAC_FTR_EMAC4	| EMAC_FTR_HAS_NEW_STACR	|
 	    EMAC_FTR_STACR_OC_INVERT	|
 #endif
 #ifdef CONFIG_IBM_NEW_EMAC_TAH

[PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware

[Benjamin Herrenschmidt]

From: Hugh Blemings <hugh@blemings.org>

Depending on how the 44x processors are wired, some EMAC cells
might not be useable (and not connected to a PHY). However, some
device-trees may choose to still expose them (since their registers
are present in the MMIO space) but with an "unused" property in them.

Signed-off-by: Hugh Blemings <hugh@blemings.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

 drivers/net/ibm_newemac/core.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux-work/drivers/net/ibm_newemac/core.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.c	2007-11-20 14:47:02.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.c	2007-11-20 14:47:05.000000000 +1100
@@ -2550,6 +2550,10 @@ static int __devinit emac_probe(struct o
 	struct device_node **blist = NULL;
 	int err, i;
 
+	/* Skip unused/unwired EMACS */
+	if (of_get_property(np, "unused", NULL))
+		return -ENODEV;
+
 	/* Find ourselves in the bootlist if we are there */
 	for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
 		if (emac_boot_list[i] == np)

[PATCH 8/11] ibm_newemac: Correct opb_bus_freq value

[Benjamin Herrenschmidt]

From: Valentine Barshak <vbarshak@ru.mvista.com>

The EMAC4_MR1_OBCI(freq) macro expects freg in MHz,
while opb_bus_freq is kept in Hz. Correct this.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff -pruN linux-2.6.orig/drivers/net/ibm_newemac/core.c linux-2.6/drivers/net/ibm_newemac/core.c
--- linux-2.6.orig/drivers/net/ibm_newemac/core.c	2007-11-23 21:27:57.000000000 +0300
+++ linux-2.6/drivers/net/ibm_newemac/core.c	2007-11-23 21:47:53.000000000 +0300
@@ -402,7 +402,7 @@ static u32 __emac_calc_base_mr1(struct e
 static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size)
 {
 	u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR |
-		EMAC4_MR1_OBCI(dev->opb_bus_freq);
+		EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000);
 
 	DBG2(dev, "__emac4_calc_base_mr1" NL);
 

[PATCH 9/11] ibm_newemac: Fix typo reading TAH channel info

[Benjamin Herrenschmidt]

From: Valentine Barshak <vbarshak@ru.mvista.com>

This patch fixes a typo in ibm_newemac/core.c
(tah_port should be used instead of tah_ph)

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

 drivers/net/ibm_newemac/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-work/drivers/net/ibm_newemac/core.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.c	2007-11-26 09:43:04.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.c	2007-11-26 09:43:05.000000000 +1100
@@ -2442,7 +2442,7 @@ static int __devinit emac_init_config(st
 	if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0))
 		dev->tah_ph = 0;
 	if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0))
-		dev->tah_ph = 0;
+		dev->tah_port = 0;
 	if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0))
 		dev->mdio_ph = 0;
 	if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0))

[PATCH 10/11] ibm_newemac: Call dev_set_drvdata() before tah_reset()

[Benjamin Herrenschmidt]

From: Valentine Barshak <vbarshak@ru.mvista.com>

The patch moves dev_set_drvdata(&ofdev->dev, dev) up before tah_reset(ofdev)
is called to avoid a NULL pointer dereference, since tah_reset uses drvdata.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff -pruN linux-2.6.orig/drivers/net/ibm_newemac/tah.c linux-2.6/drivers/net/ibm_newemac/tah.c
--- linux-2.6.orig/drivers/net/ibm_newemac/tah.c	2007-11-23 21:27:57.000000000 +0300
+++ linux-2.6/drivers/net/ibm_newemac/tah.c	2007-11-23 21:35:12.000000000 +0300
@@ -116,13 +116,14 @@ static int __devinit tah_probe(struct of
 		goto err_free;
 	}
 
+	dev_set_drvdata(&ofdev->dev, dev);
+
 	/* Initialize TAH and enable IPv4 checksum verification, no TSO yet */
 	tah_reset(ofdev);
 
 	printk(KERN_INFO
 	       "TAH %s initialized\n", ofdev->node->full_name);
 	wmb();
-	dev_set_drvdata(&ofdev->dev, dev);
 
 	return 0;
 

[PATCH 11/11] emac: Update file headers copyright notices

[Benjamin Herrenschmidt]

This updates the copyright notices of the new EMAC driver to
avoid confusion as who is to be blamed for new bugs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 
 drivers/net/ibm_newemac/core.c  |    5 +++++
 drivers/net/ibm_newemac/core.h  |    5 +++++
 drivers/net/ibm_newemac/debug.c |    5 +++++
 drivers/net/ibm_newemac/debug.h |    5 +++++
 drivers/net/ibm_newemac/emac.h  |    5 +++++
 drivers/net/ibm_newemac/mal.c   |    5 +++++
 drivers/net/ibm_newemac/mal.h   |    5 +++++
 drivers/net/ibm_newemac/phy.c   |    5 +++++
 drivers/net/ibm_newemac/phy.h   |    5 +++++
 drivers/net/ibm_newemac/rgmii.c |    5 +++++
 drivers/net/ibm_newemac/rgmii.h |    5 +++++
 drivers/net/ibm_newemac/tah.c   |    5 +++++
 drivers/net/ibm_newemac/tah.h   |    5 +++++
 drivers/net/ibm_newemac/zmii.c  |    5 +++++
 drivers/net/ibm_newemac/zmii.h  |    5 +++++
 15 files changed, 75 insertions(+)

Index: linux-work/drivers/net/ibm_newemac/core.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.c	2007-11-30 15:35:50.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.c	2007-11-30 16:03:30.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/core.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.h	2007-11-30 15:35:50.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.h	2007-11-30 16:03:23.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/debug.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/debug.c	2007-11-30 15:35:50.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/debug.c	2007-11-30 16:03:18.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/debug.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/debug.h	2007-11-30 15:35:50.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/debug.h	2007-11-30 16:03:15.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, debug print routines.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/emac.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/emac.h	2007-11-30 15:35:50.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/emac.h	2007-11-30 16:03:09.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Register definitions for PowerPC 4xx on-chip ethernet contoller
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/mal.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/mal.c	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/mal.c	2007-11-30 16:03:02.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Memory Access Layer (MAL) support
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/mal.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/mal.h	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/mal.h	2007-11-30 16:02:55.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Memory Access Layer (MAL) support
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/phy.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/phy.c	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/phy.c	2007-11-30 16:02:47.000000000 +1100
@@ -8,6 +8,11 @@
  * This file should be shared with other drivers or eventually
  * merged as the "low level" part of miilib
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org)
  * (c) 2004-2005, Eugene Surovegin <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/phy.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/phy.h	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/phy.h	2007-11-30 16:02:32.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, PHY support
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Benjamin Herrenschmidt <benh@kernel.crashing.org>
  * February 2003
  *
Index: linux-work/drivers/net/ibm_newemac/rgmii.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/rgmii.c	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/rgmii.c	2007-11-30 16:02:23.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/rgmii.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/rgmii.h	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/rgmii.h	2007-11-30 16:02:19.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Based on ocp_zmii.h/ibm_emac_zmii.h
  * Armin Kuster akuster@mvista.com
  *
Index: linux-work/drivers/net/ibm_newemac/tah.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/tah.c	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/tah.c	2007-11-30 16:02:11.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright 2004 MontaVista Software, Inc.
  * Matt Porter <mporter@kernel.crashing.org>
  *
Index: linux-work/drivers/net/ibm_newemac/tah.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/tah.h	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/tah.h	2007-11-30 16:02:06.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright 2004 MontaVista Software, Inc.
  * Matt Porter <mporter@kernel.crashing.org>
  *
Index: linux-work/drivers/net/ibm_newemac/zmii.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/zmii.c	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/zmii.c	2007-11-30 16:01:53.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *
Index: linux-work/drivers/net/ibm_newemac/zmii.h
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/zmii.h	2007-11-30 15:35:51.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/zmii.h	2007-11-30 16:01:33.000000000 +1100
@@ -3,6 +3,11 @@
  *
  * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
  *
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * Based on the arch/ppc version of the driver:
+ *
  * Copyright (c) 2004, 2005 Zultys Technologies.
  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
  *

[PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware

[Benjamin Herrenschmidt]

From: Hugh Blemings <hugh@blemings.org>

Depending on how the 44x processors are wired, some EMAC cells
might not be useable (and not connected to a PHY). However, some
device-trees may choose to still expose them (since their registers
are present in the MMIO space) but with an "unused" property in them.

Signed-off-by: Hugh Blemings <hugh@blemings.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

 drivers/net/ibm_newemac/core.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux-work/drivers/net/ibm_newemac/core.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/core.c	2007-11-20 14:47:02.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/core.c	2007-11-20 14:47:05.000000000 +1100
@@ -2550,6 +2550,10 @@ static int __devinit emac_probe(struct o
 	struct device_node **blist = NULL;
 	int err, i;
 
+	/* Skip unused/unwired EMACS */
+	if (of_get_property(np, "unused", NULL))
+		return -ENODEV;
+
 	/* Find ourselves in the bootlist if we are there */
 	for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++)
 		if (emac_boot_list[i] == np)

Re: [PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware

[David Gibson]

On Wed, Dec 05, 2007 at 11:14:30AM +1100, Benjamin Herrenschmidt wrote:
> From: Hugh Blemings <hugh@blemings.org>
> 
> Depending on how the 44x processors are wired, some EMAC cells
> might not be useable (and not connected to a PHY). However, some
> device-trees may choose to still expose them (since their registers
> are present in the MMIO space) but with an "unused" property in
> them.

It occurred to me the other day.  Instead of using a new "unused"
property for this, should we be using the OF standard "status"
property.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

Re: [PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware

[Benjamin Herrenschmidt]

On Wed, 2007-12-05 at 14:53 +1100, David Gibson wrote:
> It occurred to me the other day.  Instead of using a new "unused"
> property for this, should we be using the OF standard "status"
> property.

Dunno... it's really not wired. Probably not even clocked.

Ben.

Re: [PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware

[David Gibson]

On Wed, Dec 05, 2007 at 03:18:49PM +1100, Benjamin Herrenschmidt wrote:
> 
> On Wed, 2007-12-05 at 14:53 +1100, David Gibson wrote:
> > It occurred to me the other day.  Instead of using a new "unused"
> > property for this, should we be using the OF standard "status"
> > property.
> 
> Dunno... it's really not wired. Probably not even clocked.

status = "fail-notconnected"; ?

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

Re: [PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware

[Benjamin Herrenschmidt]

On Wed, 2007-12-05 at 15:21 +1100, David Gibson wrote:
> On Wed, Dec 05, 2007 at 03:18:49PM +1100, Benjamin Herrenschmidt wrote:
> > 
> > On Wed, 2007-12-05 at 14:53 +1100, David Gibson wrote:
> > > It occurred to me the other day.  Instead of using a new "unused"
> > > property for this, should we be using the OF standard "status"
> > > property.
> > 
> > Dunno... it's really not wired. Probably not even clocked.
> 
> status = "fail-notconnected"; ?

Bah, that's fugly.. jeff, don't hold the patches, we may sort that out
later.

Ben.