[PATCHv2] arm64: dts: r8a7795: salvator-x: Set drive-strength for ravb pins

* [PATCHv2] arm64: dts: r8a7795: salvator-x: Set drive-strength for ravb pins
@ 2016-12-05 17:43 Niklas Söderlund
  2016-12-08 13:31 ` Simon Horman
  2016-12-09 10:05 ` Geert Uytterhoeven
  0 siblings, 2 replies; 5+ messages in thread
From: Niklas Söderlund @ 2016-12-05 17:43 UTC (permalink / raw)
  To: Simon Horman, Magnus Damm
  Cc: linux-renesas-soc, Geert Uytterhoeven, Niklas Söderlund

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.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---

Changes since v1:
- Only set drive-strength for output pins, thanks Geert.
- Add all used pin groups to the mux section.

 arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index b1eab68..784ced9 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -225,8 +225,22 @@
 	};
 
 	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>;
+		};
 	};
 
 	du_pins: du {
-- 
2.10.2

^ permalink raw reply related	[flat|nested] 5+ messages in thread