arm64: dts: ulcb: Set drive-strength for ravb pins

The EthernetAVB should not depend on the bootloader to setup correct
drive-strength values.  Values for drive-strength where found by
examining the registers after the bootloader has configured the
registers and successfully used the EthernetAVB.

Based on:
* commit 7d73a4da2681 ("arm64: dts: r8a7795: salvator-x: Set drive-strength
  for ravb pins")
* commit 4903987033be ("arm64: dts: r8a7796: salvator-x: Set drive-strength
  for ravb pins")

Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

1 files changed, 16 insertions, 2 deletions

diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index 2bc7ceb2efa4..41e83c8530f7 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -198,8 +198,22 @@
         pinctrl-names = "default";
 
         avb_pins: avb {
-                groups = "avb_mdc";
-                function = "avb";
+                mux {
+                        groups = "avb_link", "avb_phy_int", "avb_mdc",
+                                 "avb_mii";
+                        function = "avb";
+                };
+
+                pins_mdc {
+                        groups = "avb_mdc";
+                        drive-strength = <24>;
+                };
+
+                pins_mii_tx {
+                        pins = "PIN_AVB_TX_CTL", "PIN_AVB_TXC", "PIN_AVB_TD0",
+                               "PIN_AVB_TD1", "PIN_AVB_TD2", "PIN_AVB_TD3";
+                        drive-strength = <12>;
+                };
         };
 
         i2c2_pins: i2c2 {