Re: [PATCH v2] of_mdio: fix phy interrupt passing

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




Hello.

On 18-02-2014 16:16, Ben Dooks wrote:

The of_mdiobus_register_phy() is not setting phy->irq thus causing
some drivers to incorrectly assume that the PHY does not have an
IRQ associated with it. Not only do some drivers report no IRQ
they do not install an interrupt handler for the PHY.

Simplify the code setting irq and set the phy->irq at the same
time so that we cover the following issues, which should cover
all the cases the code will find:

- Set phy->irq if node has irq property and mdio->irq is NULL
- Set phy->irq if node has no irq and mdio->irq is not NULL
- Leave phy->irq as PHY_POLL default if none of the above

This fixes the issue:
  net eth0: attached PHY 1 (IRQ -1) to driver Micrel KSZ8041RNLI

to the correct:
  net eth0: attached PHY 1 (IRQ 416) to driver Micrel KSZ8041RNLI

Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>

---
Since v1:
	- Updated phy->irq setting code
	- Deal with issue if mdio->irq array NULL

Notes:

It was discussed if this should be two patches, but we end up
making enough changes in #2 the same area as #1 means that we
basically rewrite #1 in #2. So keep it as 1 patch.
---
  drivers/of/of_mdio.c | 16 +++++++++-------
  1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 875b7b6..46d95fc 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
[...]
@@ -54,12 +54,14 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi
  	if (!phy || IS_ERR(phy))
  		return 1;

-	if (mdio->irq) {
-		prev_irq = mdio->irq[addr];
-		mdio->irq[addr] =
-			irq_of_parse_and_map(child, 0);
-		if (!mdio->irq[addr])
-			mdio->irq[addr] = prev_irq;
+	rc = irq_of_parse_and_map(child, 0);
+	if (rc > 0) {
+		phy->irq = rc;
+		if (mdio->irq)
+			mdio->irq[addr] = rc;
+	} else {
+		if (mdio->irq)

   You could write that as *else if* and save a line of code...

+			phy->irq = mdio->irq[addr];
  	}

WBR, Sergei

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux