netdev - [RFC 0/2] Add ACPI bindings to the genet

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Message-Id: <20200123060823.1902366-1-jeremy.linton@arm.com>
Date:   Thu, 23 Jan 2020 00:08:21 -0600
From:   Jeremy Linton <jeremy.linton@....com>
To:     netdev@...r.kernel.org
Cc:     opendmb@...il.com, f.fainelli@...il.com, davem@...emloft.net,
        bcm-kernel-feedback-list@...adcom.com,
        linux-kernel@...r.kernel.org, wahrenst@....net,
        Jeremy Linton <jeremy.linton@....com>
Subject: [RFC 0/2] Add ACPI bindings to the genet

This patch series allows the BCM GENET, as used on the RPi4,
to attach when booted in an ACPI enviroment. The DSDT entry to trigger
this is seen below. The second patch in the set retrieves the MAC
address from the umac registers rather than carrying it directly in
the DSDT. This of course requires the firmware to pre-program it, so
we continue to fall back to a random one if it appears to be garbage.

+    Device (ETH0)
+    {
+      Name (_HID, "BCM6E4E")
+      Name (_CID, "BCM6E4E")
+      Name (_UID, 0)
+      Name (_CCA, 0x0)
+      Method (_STA)
+      {
+        Return (0xf)
+      }
+      Method (_CRS, 0x0, Serialized)
+      {
+        Name (RBUF, ResourceTemplate ()
+        {
+          Memory32Fixed (ReadWrite, 0xFd580000, 0x10000, )
+          Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) { 0xBD }
+          Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) { 0xBE }
+        })
+        Return (RBUF)
+      }
+      Name (_DSD, Package () {
+        ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+          Package () {
+          Package () { "phy-mode", "rgmii" },
+        }
+      })
+    }
+

Jeremy Linton (2):
  net: bcmgenet: Initial bcmgenet ACPI support
  net: bcmgenet: Fetch MAC address from the adapter

 .../net/ethernet/broadcom/genet/bcmgenet.c    | 64 ++++++++++++----
 drivers/net/ethernet/broadcom/genet/bcmmii.c  | 76 ++++++++++++-------
 2 files changed, 98 insertions(+), 42 deletions(-)

-- 
2.24.1