bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0217-net-genet-enable-link-energy-detect-powerdown-for-ex.patch b/target/linux/bcm27xx/patches-5.4/950-0217-net-genet-enable-link-energy-detect-powerdown-for-ex.patch
new file mode 100644
index 0000000000..ab43dfdfe5
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0217-net-genet-enable-link-energy-detect-powerdown-for-ex.patch
@@ -0,0 +1,31 @@
+From cbe8b55622fc2f0a959da599447c87cf1f967a91 Mon Sep 17 00:00:00 2001
+From: Jonathan Bell <jonathan@raspberrypi.org>
+Date: Tue, 14 May 2019 17:17:59 +0100
+Subject: [PATCH] net: genet: enable link energy detect powerdown for
+ external PHYs
+
+There are several warts surrounding bcmgenet_mii_probe() as this
+function is called from ndo_open, but it's calling registration-type
+functions. The probe should be called at probe time and refactored
+such that the PHY device data can be extracted to limit the scope
+of this flag to Broadcom PHYs.
+
+For now, pass this flag in as it puts our attached PHY into a low-power
+state when disconnected.
+
+Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
+---
+ drivers/net/ethernet/broadcom/genet/bcmmii.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
++++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
+@@ -316,6 +316,8 @@ int bcmgenet_mii_probe(struct net_device
+ 	/* Communicate the integrated PHY revision */
+ 	if (priv->internal_phy)
+ 		phy_flags = priv->gphy_rev;
++	else
++		phy_flags = PHY_BRCM_AUTO_PWRDWN_ENABLE;
+ 
+ 	/* Initialize link state variables that bcmgenet_mii_setup() uses */
+ 	priv->old_link = -1;