[PATCH v3] ARM: imx6: DHCOM i.MX6 PDK: Convert to DM_ETH

[Harald Seiler]

Use DM_ETH instead of legacy networking.  Add VIO as a fixed regulator
to the relevant device-trees and augment the FEC node with properties
for the reset GPIO.

It should be noted that the relevant properties for the reset GPIO
already exist in the PHY node but U-Boot currently ignores those and
only supports the bus-level reset properties in the FEC node.

Signed-off-by: Harald Seiler <hws at denx.de>
---

Notes:
    Changes in v2:
      - Move reset and VIO to device-tree.
      - Always enable the clock, not just if CONFIG_FEC_MXC=y.
    
    Changes in v3:
      - Rename the dt file to imx6qdl-dhcom-pdk2-u-boot.dtsi because the PHY is
        pdk2 specific.
      - More verbose commit message.

 arch/arm/dts/imx6dl-dhcom-pdk2-u-boot.dtsi  |  6 +++
 arch/arm/dts/imx6q-dhcom-pdk2-u-boot.dtsi   |  2 +
 arch/arm/dts/imx6qdl-dhcom-pdk2-u-boot.dtsi | 22 +++++++++
 board/dhelectronics/dh_imx6/dh_imx6.c       | 51 +--------------------
 configs/dh_imx6_defconfig                   |  2 +
 5 files changed, 34 insertions(+), 49 deletions(-)
 create mode 100644 arch/arm/dts/imx6dl-dhcom-pdk2-u-boot.dtsi
 create mode 100644 arch/arm/dts/imx6qdl-dhcom-pdk2-u-boot.dtsi

diff --git a/arch/arm/dts/imx6dl-dhcom-pdk2-u-boot.dtsi b/arch/arm/dts/imx6dl-dhcom-pdk2-u-boot.dtsi
new file mode 100644
index 000000000000..fc7dffea2a69
--- /dev/null
+++ b/arch/arm/dts/imx6dl-dhcom-pdk2-u-boot.dtsi
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: (GPL-2.0+)
+/*
+ * Copyright (C) 2020 Harald Seiler <hws at denx.de>
+ */
+
+#include "imx6qdl-dhcom-pdk2-u-boot.dtsi"
diff --git a/arch/arm/dts/imx6q-dhcom-pdk2-u-boot.dtsi b/arch/arm/dts/imx6q-dhcom-pdk2-u-boot.dtsi
index b94231edb3fb..026342df5a4a 100644
--- a/arch/arm/dts/imx6q-dhcom-pdk2-u-boot.dtsi
+++ b/arch/arm/dts/imx6q-dhcom-pdk2-u-boot.dtsi
@@ -3,6 +3,8 @@
  * Copyright (C) 2019 Claudius Heine <ch at denx.de>
  */
 
+#include "imx6qdl-dhcom-pdk2-u-boot.dtsi"
+
 / {
 	wdt-reboot {
 		compatible = "wdt-reboot";
diff --git a/arch/arm/dts/imx6qdl-dhcom-pdk2-u-boot.dtsi b/arch/arm/dts/imx6qdl-dhcom-pdk2-u-boot.dtsi
new file mode 100644
index 000000000000..88840bb45920
--- /dev/null
+++ b/arch/arm/dts/imx6qdl-dhcom-pdk2-u-boot.dtsi
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: (GPL-2.0+)
+/*
+ * Copyright (C) 2020 Harald Seiler <hws at denx.de>
+ */
+
+/ {
+	fec_vio: regulator-fec {
+		compatible = "regulator-fixed";
+
+		regulator-name = "fec-vio";
+		gpio = <&gpio1 7 GPIO_ACTIVE_HIGH>;
+		regulator-always-on;
+	};
+};
+
+&fec {
+	phy-reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
+	phy-reset-duration = <1>;
+	phy-reset-post-delay = <10>;
+
+	phy-supply = <&fec_vio>;
+};
diff --git a/board/dhelectronics/dh_imx6/dh_imx6.c b/board/dhelectronics/dh_imx6/dh_imx6.c
index 33ce7e8ff115..b6f8b11a10cc 100644
--- a/board/dhelectronics/dh_imx6/dh_imx6.c
+++ b/board/dhelectronics/dh_imx6/dh_imx6.c
@@ -28,10 +28,7 @@
 #include <fsl_esdhc_imx.h>
 #include <fuse.h>
 #include <i2c_eeprom.h>
-#include <miiphy.h>
 #include <mmc.h>
-#include <net.h>
-#include <netdev.h>
 #include <usb.h>
 #include <usb/ehci-ci.h>
 
@@ -52,24 +49,6 @@ int overwrite_console(void)
 	return 1;
 }
 
-#ifdef CONFIG_FEC_MXC
-static void eth_phy_reset(void)
-{
-	/* Reset PHY */
-	gpio_direction_output(IMX_GPIO_NR(5, 0) , 0);
-	udelay(500);
-	gpio_set_value(IMX_GPIO_NR(5, 0), 1);
-
-	/* Enable VIO */
-	gpio_direction_output(IMX_GPIO_NR(1, 7) , 0);
-
-	/*
-	 * KSZ9021 PHY needs at least 10 mSec after PHY reset
-	 * is released to stabilize
-	 */
-	mdelay(10);
-}
-
 static int setup_fec_clock(void)
 {
 	struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
@@ -80,34 +59,6 @@ static int setup_fec_clock(void)
 	return enable_fec_anatop_clock(0, ENET_50MHZ);
 }
 
-int board_eth_init(bd_t *bis)
-{
-	uint32_t base = IMX_FEC_BASE;
-	struct mii_dev *bus = NULL;
-	struct phy_device *phydev = NULL;
-
-	gpio_request(IMX_GPIO_NR(5, 0), "PHY-reset");
-	gpio_request(IMX_GPIO_NR(1, 7), "VIO");
-
-	setup_fec_clock();
-
-	eth_phy_reset();
-
-	bus = fec_get_miibus(base, -1);
-	if (!bus)
-		return -EINVAL;
-
-	/* Scan PHY 0 */
-	phydev = phy_find_by_mask(bus, 0xf, PHY_INTERFACE_MODE_RGMII);
-	if (!phydev) {
-		printf("Ethernet PHY not found!\n");
-		return -EINVAL;
-	}
-
-	return fec_probe(bis, -1, base, bus, phydev);
-}
-#endif
-
 #ifdef CONFIG_USB_EHCI_MX6
 static void setup_usb(void)
 {
@@ -190,6 +141,8 @@ int board_init(void)
 
 	setup_dhcom_mac_from_fuse();
 
+	setup_fec_clock();
+
 	return 0;
 }
 
diff --git a/configs/dh_imx6_defconfig b/configs/dh_imx6_defconfig
index cbfc3c394e7d..40de1d82031b 100644
--- a/configs/dh_imx6_defconfig
+++ b/configs/dh_imx6_defconfig
@@ -74,6 +74,8 @@ CONFIG_SPI_FLASH_MTD=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y
+CONFIG_DM_ETH=y
+CONFIG_DM_MDIO=y
 CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_PINCTRL=y
-- 
2.26.0