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ar71xx: fix switch probing on kernel 4.14

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The bump to 4.14 changed the way mdio probes behind switches.

While the board_info is added to the list, the code that actually inserted
the list info into the phydev structure was missing.

This resulted in non-working ethernet ports.

Re-add it to fix switch probing.
This mimics the exact behaviour as it was in kernel 4.9.

Before:

[    1.066007] switch0: Atheros AR8327 rev. 4 switch registered on ag71xx-mdio.0
[    1.073409] Atheros AR8216/AR8236/AR8316: probe of ag71xx-mdio.0:00 failed with error -22
[    1.102455] libphy: ag71xx_mdio: probed
[    1.737938] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.0:00 [uid=004dd034, driver=Generic PHY]
[    1.747994] eth0: Atheros AG71xx at 0xb9000000, irq 4, mode:RGMII
[    2.377642] ag71xx-mdio.1: Found an AR934X built-in switch
[    2.429938] eth1: Atheros AG71xx at 0xba000000, irq 5, mode:GMII

After:

[   11.163357] libphy: Fixed MDIO Bus: probed
[   11.319898] libphy: ag71xx_mdio: probed
[   11.360844] switch0: Atheros AR8327 rev. 4 switch registered on ag71xx-mdio.0
[   12.447398] libphy: ag71xx_mdio: probed
[   13.077402] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.0:00 [uid=004dd034, driver=Atheros AR8216/AR8236/AR8316]
[   13.088989] eth0: Atheros AG71xx at 0xb9000000, irq 4, mode:RGMII
[   13.717716] ag71xx-mdio.1: Found an AR934X built-in switch
[   13.769990] eth1: Atheros AG71xx at 0xba000000, irq 5, mode:GMII

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
This commit is contained in:
Koen Vandeputte 2018-08-30 19:09:46 +02:00
parent 2253524023
commit 42f158314e
1 changed files with 67 additions and 0 deletions
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67
target/linux/ar71xx/patches-4.14/950-add-boardinfo-platform-data.patch Normal file
View file

@ -0,0 +1,67 @@
--- a/drivers/net/phy/mdio-boardinfo.c
+++ b/drivers/net/phy/mdio-boardinfo.c
@@ -15,8 +15,11 @@
#include "mdio-boardinfo.h"
-static LIST_HEAD(mdio_board_list);
-static DEFINE_MUTEX(mdio_board_lock);
+LIST_HEAD(mdio_board_list);
+EXPORT_SYMBOL_GPL(mdio_board_list);
+
+DEFINE_MUTEX(mdio_board_lock);
+EXPORT_SYMBOL_GPL(mdio_board_lock);
/**
* mdiobus_setup_mdiodev_from_board_info - create and setup MDIO devices
--- a/drivers/net/phy/mdio-boardinfo.h
+++ b/drivers/net/phy/mdio-boardinfo.h
@@ -20,4 +20,7 @@ void mdiobus_setup_mdiodev_from_board_in
(struct mii_bus *bus,
struct mdio_board_info *bi));
+extern struct mutex mdio_board_lock;
+extern struct list_head mdio_board_list;
+
#endif /* __MDIO_BOARD_INFO_H */
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -455,6 +455,17 @@ void mdiobus_free(struct mii_bus *bus)
}
EXPORT_SYMBOL(mdiobus_free);
+static void mdiobus_setup_phydev_from_boardinfo(struct mii_bus *bus,
+ struct phy_device *phydev,
+ struct mdio_board_info *bi)
+{
+ if (strcmp(bus->id, bi->bus_id) ||
+ bi->mdio_addr != phydev->mdio.addr)
+ return;
+
+ phydev->mdio.dev.platform_data = (void *) bi->platform_data;
+}
+
/**
* mdiobus_scan - scan a bus for MDIO devices.
* @bus: mii_bus to scan
@@ -470,6 +481,7 @@ EXPORT_SYMBOL(mdiobus_free);
struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
{
struct phy_device *phydev;
+ struct mdio_board_entry *be;
int err;
phydev = get_phy_device(bus, addr, false);
@@ -482,6 +494,12 @@ struct phy_device *mdiobus_scan(struct m
*/
of_mdiobus_link_mdiodev(bus, &phydev->mdio);
+ mutex_lock(&mdio_board_lock);
+ list_for_each_entry(be, &mdio_board_list, list)
+ mdiobus_setup_phydev_from_boardinfo(bus, phydev,
+ &be->board_info);
+ mutex_unlock(&mdio_board_lock);
+
err = phy_device_register(phydev);
if (err) {
phy_device_free(phydev);