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ARM: imx6: DHCOM i.MX6 PDK: Convert to DM_ETH 

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 (reset-gpios, reset-delay-us,
reset-post-delay-us) but U-Boot currently ignores those and only
supports the bus-level reset properties in the FEC node
(phy-reset-gpios, phy-reset-duration, phy-reset-post-delay).

Signed-off-by: Harald Seiler <hws@denx.de>
This commit is contained in:
Harald Seiler 2020-04-15 20:04:53 +02:00 committed by Stefano Babic
parent fe2f432c1c
commit 15df6b31b6
5 changed files with 33 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/dts/imx6dl-dhcom-pdk2-u-boot.dtsi Normal file
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@ -0,0 +1,6 @@
// SPDX-License-Identifier: (GPL-2.0+)
/*
* Copyright (C) 2020 Harald Seiler <hws@denx.de>
*/
#include "imx6qdl-dhcom-pdk2-u-boot.dtsi"

2
arch/arm/dts/imx6q-dhcom-pdk2-u-boot.dtsi
View File

@ -3,6 +3,8 @@
* Copyright (C) 2019 Claudius Heine <ch@denx.de>
*/
#include "imx6qdl-dhcom-pdk2-u-boot.dtsi"
/ {
wdt-reboot {
compatible = "wdt-reboot";

21
arch/arm/dts/imx6qdl-dhcom-pdk2-u-boot.dtsi Normal file
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@ -0,0 +1,21 @@
// SPDX-License-Identifier: (GPL-2.0+)
/*
* Copyright (C) 2020 Harald Seiler <hws@denx.de>
*/
/ {
fec_vio: regulator-fec {
compatible = "regulator-fixed";
regulator-name = "fec-vio";
gpio = <&gpio1 7 GPIO_ACTIVE_LOW>;
};
};
&fec {
phy-reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
phy-reset-duration = <1>;
phy-reset-post-delay = <10>;
phy-supply = <&fec_vio>;
};

51
board/dhelectronics/dh_imx6/dh_imx6.c
View File

@ -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;
}

2
configs/dh_imx6_defconfig
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@ -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