Re: PA Semi PWRficient Gigabit Ethernet doesn't work anymore since the first networking updates for the kernel 4.16
From: Andrew Lunn <andrew@lunn.ch>
Date: 2018-02-04 17:16:31
Also in:
linuxppc-dev
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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.
quoted hunk ↗ jump to hunk
--- 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 <andrew@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 <redacted> Signed-off-by: Andrew Lunn <andrew@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