On Sun, Feb 04, 2018 at 05:47:03PM +0100, Christian Zigotzky wrote:
> Hello,
>
> The PA Semi PWRficient Gigabit Ethernet doesn't work anymore since the first
> networking updates [1] for the kernel 4.16.
>
> Error messages:
>
> [ 0.634241] libphy: pasemi gpio mdio bus: probed
> [ 0.634749] pasemi gpio mdio bus: Cannot register as MDIO bus, err -38
-38 is ENOSYS.
> --- a/drivers/net/phy/mdio_bus.c 2018-02-03 17:34:46.973045321 +0100
> +++ b/drivers/net/phy/mdio_bus.c 2018-02-04 11:03:14.909093360 +0100
> @@ -47,41 +47,11 @@
>
> #include "mdio-boardinfo.h"
>
> -static int mdiobus_register_gpiod(struct mdio_device *mdiodev)
> -{
> - struct gpio_desc *gpiod = NULL;
> -
> - /* Deassert the optional reset signal */
> - if (mdiodev->dev.of_node)
> - gpiod = fwnode_get_named_gpiod(&mdiodev->dev.of_node->fwnode,
> - "reset-gpios", 0, GPIOD_OUT_LOW,
> - "PHY reset");
So i think you don't have GPIOLIB enabled. Hence you are hitting
http://elixir.free-electrons.com/linux/latest/source/include/linux/gpio/consumer.h#L470
static inline
struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
const char *propname, int index,
enum gpiod_flags dflags,
const char *label)
{
return ERR_PTR(-ENOSYS);
}
So rather than just deleting all this code, breaking other platforms
that need this gpio, lets try a real fix. Please try this. If it
works, i will formally submit it.
Andrew
>From a4210ba306948497d7360927c1e532eb903c58b2 Mon Sep 17 00:00:00 2001
From: Andrew Lunn <and...@lunn.ch>
Date: Sun, 4 Feb 2018 11:09:20 -0600
Subject: [PATCH] net: phy: Handle not having GPIO enabled in the kernel
If CONFIG_GPIOLIB is disabled, fwnode_get_named_gpiod() becomes a stub
function, which return -ENOSYS. Handle this in the same way as
-ENOENT, i.e. assume there is no GPIO used to reset the PHYs.
Reported-by: Christian Zigotzky <chzigot...@xenosoft.de>
Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
drivers/net/phy/mdio_bus.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 88272b3ac2e2..24b5511222c8 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -56,7 +56,8 @@ static int mdiobus_register_gpiod(struct mdio_device *mdiodev)
gpiod = fwnode_get_named_gpiod(&mdiodev->dev.of_node->fwnode,
"reset-gpios", 0, GPIOD_OUT_LOW,
"PHY reset");
- if (PTR_ERR(gpiod) == -ENOENT)
+ if (PTR_ERR(gpiod) == -ENOENT ||
+ PTR_ERR(gpiod) == -ENOSYS)
gpiod = NULL;
else if (IS_ERR(gpiod))
return PTR_ERR(gpiod);
--
2.15.1
