diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0129-net-lan78xx-Support-auto-downshift-to-100Mb-s.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0129-net-lan78xx-Support-auto-downshift-to-100Mb-s.patch | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0129-net-lan78xx-Support-auto-downshift-to-100Mb-s.patch b/target/linux/bcm27xx/patches-5.4/950-0129-net-lan78xx-Support-auto-downshift-to-100Mb-s.patch deleted file mode 100644 index 510218ecf9..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0129-net-lan78xx-Support-auto-downshift-to-100Mb-s.patch +++ /dev/null @@ -1,91 +0,0 @@ -From d205110391b7a85af9d45d4e634f1e5595c0a518 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Mon, 26 Nov 2018 19:46:58 +0000 -Subject: [PATCH] net: lan78xx: Support auto-downshift to 100Mb/s - -Ethernet cables with faulty or missing pairs (specifically pairs C and -D) allow auto-negotiation to 1000Mbs, but do not support the successful -establishment of a link. Add a DT property, "microchip,downshift-after", -to configure the number of auto-negotiation failures after which it -falls back to 100Mbs. Valid values are 2, 3, 4, 5 and 0, where 0 means -never downshift. - -Signed-off-by: Phil Elwell <phil@raspberrypi.org> ---- - .../bindings/net/microchip,lan78xx.txt | 3 +++ - drivers/net/phy/microchip.c | 27 +++++++++++++++++++ - include/linux/microchipphy.h | 8 ++++++ - 3 files changed, 38 insertions(+) - ---- a/Documentation/devicetree/bindings/net/microchip,lan78xx.txt -+++ b/Documentation/devicetree/bindings/net/microchip,lan78xx.txt -@@ -14,6 +14,9 @@ Optional properties of the embedded PHY: - - microchip,led-modes: a 0..4 element vector, with each element configuring - the operating mode of an LED. Omitted LEDs are turned off. Allowed values - are defined in "include/dt-bindings/net/microchip-lan78xx.h". -+- microchip,downshift-after: sets the number of failed auto-negotiation -+ attempts after which the link is downgraded from 1000BASE-T. Should be one of -+ 2, 3, 4, 5 or 0, where 0 means never downshift. - - Example: - ---- a/drivers/net/phy/microchip.c -+++ b/drivers/net/phy/microchip.c -@@ -217,6 +217,7 @@ static int lan88xx_probe(struct phy_devi - struct device *dev = &phydev->mdio.dev; - struct lan88xx_priv *priv; - u32 led_modes[4]; -+ u32 downshift_after = 0; - int len; - - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); -@@ -246,6 +247,32 @@ static int lan88xx_probe(struct phy_devi - return -EINVAL; - } - -+ if (!of_property_read_u32(dev->of_node, -+ "microchip,downshift-after", -+ &downshift_after)) { -+ u32 mask = LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK; -+ u32 val= LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT; -+ -+ switch (downshift_after) { -+ case 2: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_2; -+ break; -+ case 3: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_3; -+ break; -+ case 4: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_4; -+ break; -+ case 5: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_5; -+ break; -+ case 0: // Disable completely -+ mask = LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT; -+ val = 0; -+ break; -+ default: -+ return -EINVAL; -+ } -+ (void)phy_modify_paged(phydev, 1, LAN78XX_PHY_CTRL3, -+ mask, val); -+ } -+ - /* these values can be used to identify internal PHY */ - priv->chip_id = phy_read_mmd(phydev, 3, LAN88XX_MMD3_CHIP_ID); - priv->chip_rev = phy_read_mmd(phydev, 3, LAN88XX_MMD3_CHIP_REV); ---- a/include/linux/microchipphy.h -+++ b/include/linux/microchipphy.h -@@ -61,6 +61,14 @@ - /* Registers specific to the LAN7800/LAN7850 embedded phy */ - #define LAN78XX_PHY_LED_MODE_SELECT (0x1D) - -+#define LAN78XX_PHY_CTRL3 (0x14) -+#define LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT (0x0010) -+#define LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK (0x000c) -+#define LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_2 (0x0000) -+#define LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_3 (0x0004) -+#define LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_4 (0x0008) -+#define LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_5 (0x000c) -+ - /* DSP registers */ - #define PHY_ARDENNES_MMD_DEV_3_PHY_CFG (0x806A) - #define PHY_ARDENNES_MMD_DEV_3_PHY_CFG_ZD_DLY_EN_ (0x2000) |