commit e6f48aad153ae901ca3340b3207968e2f9c47f66
author Frieder Schrempf <frieder.schrempf@kontron.de> Wed Sep 29 16:42:41 2021 +0200
committer Stefano Babic <sbabic@denx.de> Thu Oct 07 16:53:50 2021 +0200
tree b998a57bd5a69fbfd9e41533e89a136dd47eb478
parent bc959905df4b31c2b9f77e5745e9d10d229a9bfa

imx: imx6ul: Add support for Kontron Electronics SL/BL i.MX6UL/ULL boards (N63xx/N64xx)

This adds support for i.MX6UL/ULL-based evaluation kits with SoMs by
Kontron Electronics GmbH.

Currently there are the following SoM flavors (SoM-Line):
  * N6310: SOM with i.MX6UL-2, 256MB RAM, 256MB SPI NAND
  * N6311: SOM with i.MX6UL-2, 512MB RAM, 512MB SPI NAND
  * N6411: SOM with i.MX6ULL, 512MB RAM, 512MB SPI NAND

And the according evaluation boards (Board-Line):
  * N6310-S: Baseboard with SOM N6310, eMMC, display (optional), ...
  * N6311-S: Baseboard with SOM N6311, eMMC, display (optional), ...
  * N6411-S: Baseboard with SOM N6411, eMMC, display (optional), ...

Currently U-Boot describes i.MX6UL and i.MX6ULL through separate config
options at compile-time. Though the differences are so minor, that for
the scope of these SoMs we just use a single defconfig that is compatible
with both SoCs.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Stefano Babic <sbabic@denx.de>

arch/arm/dts/imx6ul-kontron-n6x1x-s-u-boot.dtsi

diff --git a/arch/arm/dts/imx6ul-kontron-n6x1x-s-u-boot.dtsi b/arch/arm/dts/imx6ul-kontron-n6x1x-s-u-boot.dtsi
new file mode 100644
index 0000000..39cc6d0
--- /dev/null
+++ b/arch/arm/dts/imx6ul-kontron-n6x1x-s-u-boot.dtsi
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2017 exceet electronics GmbH
+ * Copyright (C) 2018 Kontron Electronics GmbH
+ */
+
+#if defined(CONFIG_FIT)
+
+/ {
+	binman: binman {
+		filename = "flash.bin";
+		pad-byte = <0x00>;
+
+		spl: blob-ext@1 {
+			offset = <0x0>;
+			filename = "SPL";
+		};
+
+		uboot: blob-ext@2 {
+			offset = <0x11000>;
+			filename = "u-boot.img";
+		};
+	};
+};
+
+#endif /* CONFIG_FIT */
+
+/*
+ * To make the PHYs work, we need to set the reset pin once. Afterwards
+ * in Linux we can't assign the shared reset GPIO to the PHYs, as this
+ * would cause Linux to reset both PHYs every time one of them gets
+ * reinitialized.
+ *
+ * Also we disable the second ethernet as it currently doesn't work with
+ * the devicetree setup in U-Boot.
+ */
+
+&fec1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_enet1 &pinctrl_enet1_mdio>;
+	phy-mode = "rmii";
+	phy-handle = <&ethphy1>;
+	phy-reset-gpios = <&gpio5 9 GPIO_ACTIVE_HIGH>;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy1: ethernet-phy@1 {
+			reg = <1>;
+			micrel,led-mode = <0>;
+			clocks = <&clks IMX6UL_CLK_ENET_REF>;
+			clock-names = "rmii-ref";
+		};
+	};
+};
+
+&fec2 {
+	status = "disabled";
+	/delete-property/ phy-handle;
+	/delete-node/ mdio;
+};