board/compulab/imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2018 NXP
  * Copyright 2020 Linaro
  */

 #include <common.h>
 #include <env.h>
 #include <extension_board.h>
 #include <hang.h>
 #include <i2c.h>
 #include <init.h>
 #include <miiphy.h>
 #include <netdev.h>

 #include <asm/arch/clock.h>
 #include <asm/arch/imx8mm_pins.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/mach-imx/gpio.h>
 #include <asm/mach-imx/mxc_i2c.h>
 #include <asm/sections.h>

 #include "ddr/ddr.h"

 DECLARE_GLOBAL_DATA_PTR;

 int board_phys_sdram_size(phys_size_t *size)
 {
 	struct lpddr4_tcm_desc *lpddr4_tcm_desc =
 		(struct lpddr4_tcm_desc *)TCM_DATA_CFG;

 	switch (lpddr4_tcm_desc->size) {
 	case 4096:
 	case 2048:
 	case 1024:
 		*size = (1L << 20) * lpddr4_tcm_desc->size;
 		break;
 	default:
 		printf("%s: DRAM size %uM is not supported\n",
 		       __func__,
 		       lpddr4_tcm_desc->size);
 		hang();
 		break;
 	};

 	return 0;
 }

 /* IOT_GATE-iMX8 extension boards ID */
 typedef enum {
 	IOT_GATE_EXT_EMPTY, /* No extension */
 	IOT_GATE_EXT_CAN,   /* CAN bus */
 	IOT_GATE_EXT_IED,   /* Bridge */
 	IOT_GATE_EXT_POE,   /* POE */
 	IOT_GATE_EXT_POEV2, /* POEv2 */
 } iot_gate_imx8_ext;

 typedef enum {
 	IOT_GATE_IMX8_CARD_ID_EMPTY = 0,  /* card id - uninhabited */
 	IOT_GATE_IMX8_CARD_ID_DI4O4 = 1,  /* Card ID - IED-DI4O4   */
 	IOT_GATE_IMX8_CARD_ID_RS_485 = 2, /* Card ID - IED-RS485   */
 	IOT_GATE_IMX8_CARD_ID_TPM = 3,    /* Card ID - IED-TPM     */
 	IOT_GATE_IMX8_CARD_ID_CAN = 4,    /* Card ID - IED-CAN     */
 	IOT_GATE_IMX8_CARD_ID_CL420 = 5,  /* Card ID - IED-CL420   */
 	IOT_GATE_IMX8_CARD_ID_RS_232 = 6, /* Card ID - IED-RS232   */
 } iot_gate_imx8_ied_ext;

 static int setup_fec(void)
 {
 	if (IS_ENABLED(CONFIG_FEC_MXC)) {
 		struct iomuxc_gpr_base_regs *gpr =
 			(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;

 		/* Use 125M anatop REF_CLK1 for ENET1, not from external */
 		clrsetbits_le32(&gpr->gpr[1], 0x2000, 0);
 	}

 	return 0;
 }

 int board_phy_config(struct phy_device *phydev)
 {
 	if (IS_ENABLED(CONFIG_FEC_MXC)) {
 		/* enable rgmii rxc skew and phy mode select to RGMII copper */
 		phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x1f);
 		phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x8);

 		phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x00);
 		phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x82ee);
 		phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
 		phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x100);

 		if (phydev->drv->config)
 			phydev->drv->config(phydev);
 	}
 	return 0;
 }

 int board_init(void)
 {
 	if (IS_ENABLED(CONFIG_FEC_MXC))
 		setup_fec();

 	return 0;
 }

 int board_mmc_get_env_dev(int devno)
 {
 	return devno;
 }

 #define IOT_GATE_IMX8_EXT_I2C 3 /* I2C ID of the extension board */
 #define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM 0x54 /* I2C address of the EEPROM */

 /* I2C address of the EEPROM in the POE extension */
 #define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POE 0x50
 #define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POEV2 0x51
 #define IOT_GATE_IMX8_EXT_I2C_ADDR_GPIO 0x22 /* I2C address of the GPIO
 						extender */

 static int iot_gate_imx8_ext_id = IOT_GATE_EXT_EMPTY; /* Extension board ID */
 static int iot_gate_imx8_ext_ied_id [3] = {
 	IOT_GATE_IMX8_CARD_ID_EMPTY,
 	IOT_GATE_IMX8_CARD_ID_EMPTY,
 	IOT_GATE_IMX8_CARD_ID_EMPTY };

 /*
  * iot_gate_imx8_detect_ext() - extended board detection
  * The detection is done according to the detected I2C devices.
  */
 static void iot_gate_imx8_detect_ext(void)
 {
 	int ret;
 	struct udevice *i2c_bus, *i2c_dev;

 	ret = uclass_get_device_by_seq(UCLASS_I2C, IOT_GATE_IMX8_EXT_I2C,
 				       &i2c_bus);
 	if (ret) {
 		printf("%s: Failed getting i2c device\n", __func__);
 		return;
 	}

 	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POE, 0,
 			   &i2c_dev);
 	if (!ret) {
 		iot_gate_imx8_ext_id = IOT_GATE_EXT_POE;
 		return;
 	}

 	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POEV2, 0,
 			   &i2c_dev);
 	if (!ret) {
 		iot_gate_imx8_ext_id = IOT_GATE_EXT_POEV2;
 		return;
 	}

 	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM, 0,
 			   &i2c_dev);
 	if (ret){
 		iot_gate_imx8_ext_id = IOT_GATE_EXT_EMPTY;
 		return;
 	}
 	/* Only the bridge extension includes the GPIO extender */
 	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_GPIO, 0,
 			   &i2c_dev);
 	if (ret) /* GPIO extender not detected */
 		iot_gate_imx8_ext_id = IOT_GATE_EXT_CAN;
 	else /* GPIO extender detected */
 		iot_gate_imx8_ext_id = IOT_GATE_EXT_IED;
 }

 static iomux_v3_cfg_t const iot_gate_imx8_ext_ied_pads[] = {
 	IMX8MM_PAD_NAND_ALE_GPIO3_IO0	 | MUX_PAD_CTRL(PAD_CTL_PE),
 	IMX8MM_PAD_NAND_CE0_B_GPIO3_IO1	 | MUX_PAD_CTRL(PAD_CTL_PE),
 	IMX8MM_PAD_NAND_DATA00_GPIO3_IO6 | MUX_PAD_CTRL(PAD_CTL_PE),
 	IMX8MM_PAD_NAND_DATA01_GPIO3_IO7 | MUX_PAD_CTRL(PAD_CTL_PE),
 	IMX8MM_PAD_NAND_DATA02_GPIO3_IO8 | MUX_PAD_CTRL(PAD_CTL_PE),
 	IMX8MM_PAD_NAND_DATA03_GPIO3_IO9 | MUX_PAD_CTRL(PAD_CTL_PE),
 };

 static iomux_v3_cfg_t const iot_gate_imx8_ext_poev2_pads[] = {
 	IMX8MM_PAD_SAI3_TXD_GPIO5_IO1	 | MUX_PAD_CTRL(PAD_CTL_PE |
 							PAD_CTL_PUE),
 };

 /* Extension board bridge GPIOs */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_I0 IMX_GPIO_NR(3, 0) /* IN 0 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_I1 IMX_GPIO_NR(3, 1) /* IN 1 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_I2 IMX_GPIO_NR(3, 6) /* IN 2 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_I3 IMX_GPIO_NR(3, 7) /* IN 3 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_O0 IMX_GPIO_NR(3, 8) /* OUT 0 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_O1 IMX_GPIO_NR(3, 9) /* OUT 1 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_O2 IMX_GPIO_NR(6, 9) /* OUT 2 */
 #define IOT_GATE_IMX8_GPIO_EXT_IED_O3 IMX_GPIO_NR(6, 10)/* OUT 3 */

 /* Extension board POE GPIOs */
 #define IOT_GATE_IMX8_GPIO_EXT_POE_MUX IMX_GPIO_NR(5, 1)/* USB_MUX */

 /*
  * iot_gate_imx8_update_pinmux() - update the pinmux
  * Update the pinmux according to the detected extended board.
  */
 static void iot_gate_imx8_update_pinmux(void)
 {
 	if (iot_gate_imx8_ext_id == IOT_GATE_EXT_POEV2) {
 		imx_iomux_v3_setup_multiple_pads(iot_gate_imx8_ext_poev2_pads,
 				ARRAY_SIZE(iot_gate_imx8_ext_poev2_pads));
 		gpio_request(IOT_GATE_IMX8_GPIO_EXT_POE_MUX, "poev2_usb-mux");
 		/* Update USB MUX state */
 		gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_POE_MUX, 1);

 		return;
 	}
 	if (iot_gate_imx8_ext_id != IOT_GATE_EXT_IED)
 		return;

 	imx_iomux_v3_setup_multiple_pads(iot_gate_imx8_ext_ied_pads,
 					 ARRAY_SIZE(iot_gate_imx8_ext_ied_pads));

 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I0, "ied-di4o4_i0");
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I0);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I1, "ied-di4o4_i1");
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I1);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I2, "ied-di4o4_i2");
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I2);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I3, "ied-di4o4_i3");
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I3);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O0, "ied-di4o4_o0");
 	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O0, 0);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O1, "ied-di4o4_o1");
 	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O1, 0);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O2, "ied-di4o4_o2");
 	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O2, 0);
 	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O3, "ied-di4o4_o3");
 	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O3, 0);
 }

 #define IOT_GATE_IMX8_GPIO_S0B0 IMX_GPIO_NR(6, 0) /* Slot ID slot 0 bit 0 */
 #define IOT_GATE_IMX8_GPIO_S0B1 IMX_GPIO_NR(6, 1) /* Slot ID slot 0 bit 1 */
 #define IOT_GATE_IMX8_GPIO_S0B2 IMX_GPIO_NR(6, 2) /* Slot ID slot 0 bit 2 */
 #define IOT_GATE_IMX8_GPIO_S1B0 IMX_GPIO_NR(6, 3) /* Slot ID slot 1 bit 0 */
 #define IOT_GATE_IMX8_GPIO_S1B1 IMX_GPIO_NR(6, 4) /* Slot ID slot 1 bit 1 */
 #define IOT_GATE_IMX8_GPIO_S1B2 IMX_GPIO_NR(6, 5) /* Slot ID slot 1 bit 2 */
 #define IOT_GATE_IMX8_GPIO_S2B0 IMX_GPIO_NR(6, 6) /* Slot ID slot 2 bit 0 */
 #define IOT_GATE_IMX8_GPIO_S2B1 IMX_GPIO_NR(6, 7) /* Slot ID slot 2 bit 1 */
 #define IOT_GATE_IMX8_GPIO_S2B2 IMX_GPIO_NR(6, 8) /* Slot ID slot 2 bit 2 */

 /*
  * iot_gate_imx8_update_ext_ied()
  * Update device tree of the extended board IED-BASE.
  * The device tree is updated according to the detected sub modules.
  *
  * Return 0 for success, 1 for failure.
  */
 static int iot_gate_imx8_update_ext_ied(void)
 {
 	int revision;

 	if (iot_gate_imx8_ext_id != IOT_GATE_EXT_IED)
 		return 0;

 	/* ID GPIO initializations */
 	if (gpio_request(IOT_GATE_IMX8_GPIO_S0B0, "id_s0b0") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S0B1, "id_s0b1") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S0B2, "id_s0b2") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S1B0, "id_s1b0") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S1B1, "id_s1b1") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S1B2, "id_s1b2") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S2B0, "id_s2b0") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S2B1, "id_s2b1") ||
 	    gpio_request(IOT_GATE_IMX8_GPIO_S2B2, "id_s2b2")) {
 		printf("%s: ID GPIO request failure\n", __func__);
 		return 1;
 	}
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B0);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B1);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B2);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B0);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B1);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B2);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B0);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B1);
 	gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B2);

 	/* Get slot 0 card ID */
 	revision =	gpio_get_value(IOT_GATE_IMX8_GPIO_S0B0)		|
 			gpio_get_value(IOT_GATE_IMX8_GPIO_S0B1) << 1	|
 			gpio_get_value(IOT_GATE_IMX8_GPIO_S0B2) << 2;
 	iot_gate_imx8_ext_ied_id[0] = revision;

 	/* Get slot 1 card ID */
 	revision =	gpio_get_value(IOT_GATE_IMX8_GPIO_S1B0)		|
 			gpio_get_value(IOT_GATE_IMX8_GPIO_S1B1) << 1	|
 			gpio_get_value(IOT_GATE_IMX8_GPIO_S1B2) << 2;
 	iot_gate_imx8_ext_ied_id[1] = revision;

 	/* Get slot 2 card ID */
 	revision =	gpio_get_value(IOT_GATE_IMX8_GPIO_S2B0)		|
 			gpio_get_value(IOT_GATE_IMX8_GPIO_S2B1) << 1	|
 			gpio_get_value(IOT_GATE_IMX8_GPIO_S2B2) << 2;
 	iot_gate_imx8_ext_ied_id[2] = revision;

 	return 0;
 }

 int board_fix_fdt(void *rw_fdt_blob)
 {
 	return 0;
 }

 int extension_board_scan(struct list_head *extension_list)
 {
 	struct extension *extension = NULL;
 	int i;
 	int ret = 0;

 	iot_gate_imx8_detect_ext(); /* Extended board detection */

 	switch(iot_gate_imx8_ext_id) {
 	case IOT_GATE_EXT_EMPTY:
 		break;
 	case IOT_GATE_EXT_CAN:
 		extension = calloc(1, sizeof(struct extension));
 		snprintf(extension->name, sizeof(extension->name),
 			 "IOT_GATE_EXT_CAN");
 		break;
 	case IOT_GATE_EXT_IED:
 		extension = calloc(1, sizeof(struct extension));
 		snprintf(extension->name, sizeof(extension->name),
 			 "IOT_GATE_EXT_IED");
 		snprintf(extension->overlay, sizeof(extension->overlay),
 			 "imx8mm-cl-iot-gate-ied.dtbo");
 		break;
 	case IOT_GATE_EXT_POE:
 		extension = calloc(1, sizeof(struct extension));
 		snprintf(extension->name, sizeof(extension->name),
 			 "IOT_GATE_EXT_POE");
 		break;
 	case IOT_GATE_EXT_POEV2:
 		extension = calloc(1, sizeof(struct extension));
 		snprintf(extension->name, sizeof(extension->name),
 			 "IOT_GATE_EXT_POEV2");
 		break;
 	default:
 		printf("IOT_GATE-iMX8 extension board: unknown\n");
 		break;
 	}

 	if (extension) {
 		snprintf(extension->owner, sizeof(extension->owner),
 			 "Compulab");
 		list_add_tail(&extension->list, extension_list);
 		ret = 1;
 	} else
 		return ret;

 	iot_gate_imx8_update_pinmux();

 	iot_gate_imx8_update_ext_ied();
 	for (i=0; i<ARRAY_SIZE(iot_gate_imx8_ext_ied_id); i++) {
 		extension = NULL;
 		switch (iot_gate_imx8_ext_ied_id[i]) {
 		case IOT_GATE_IMX8_CARD_ID_EMPTY:
 			break;
 		case IOT_GATE_IMX8_CARD_ID_RS_485:
 			extension = calloc(1, sizeof(struct extension));
 			snprintf(extension->name, sizeof(extension->name),
 				 "IOT_GATE_IMX8_CARD_ID_RS_485");
 			break;
 		case IOT_GATE_IMX8_CARD_ID_RS_232:
 			extension = calloc(1, sizeof(struct extension));
 			snprintf(extension->name, sizeof(extension->name),
 				 "IOT_GATE_IMX8_CARD_ID_RS_232");
 			break;
 		case IOT_GATE_IMX8_CARD_ID_CAN:
 			extension = calloc(1, sizeof(struct extension));
 			snprintf(extension->name, sizeof(extension->name),
 				 "IOT_GATE_IMX8_CARD_ID_CAN");
 			snprintf(extension->overlay, sizeof(extension->overlay),
 				 "imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
 			break;
 		case IOT_GATE_IMX8_CARD_ID_TPM:
 			extension = calloc(1, sizeof(struct extension));
 			snprintf(extension->name, sizeof(extension->name),
 				 "IOT_GATE_IMX8_CARD_ID_TPM");
 			snprintf(extension->overlay, sizeof(extension->overlay),
 				 "imx8mm-cl-iot-gate-ied-tpm%d.dtbo", i);
 			break;
 		case IOT_GATE_IMX8_CARD_ID_CL420:
 			extension = calloc(1, sizeof(struct extension));
 			snprintf(extension->name, sizeof(extension->name),
 				 "IOT_GATE_IMX8_CARD_ID_CL420");
 			snprintf(extension->overlay, sizeof(extension->overlay),
 				 "imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
 			break;
 		case IOT_GATE_IMX8_CARD_ID_DI4O4:
 			extension = calloc(1, sizeof(struct extension));
 			snprintf(extension->name, sizeof(extension->name),
 				 "IOT_GATE_IMX8_CARD_ID_DI4O4");
 			break;
 		default:
 			printf("%s: invalid slot %d card ID: %d\n",
 			       __func__, i, iot_gate_imx8_ext_ied_id[i]);
 			break;
 		}
 		if (extension) {
 			snprintf(extension->owner, sizeof(extension->owner),
 				 "Compulab");
 			snprintf(extension->other, sizeof(extension->other),
 				 "On slot %d", i);
 			list_add_tail(&extension->list, extension_list);
 			ret = ret + 1;
 		}
 	}

         return ret;
 }

 int board_late_init(void)
 {
 	if (IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)) {
 		env_set("board_name", "IOT-GATE-IMX8");
 		env_set("board_rev", "SBC-IOTMX8");
 	}

 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2018 NXP
	* Copyright 2020 Linaro
	*/

	#include <common.h>
	#include <env.h>
	#include <extension_board.h>
	#include <hang.h>
	#include <i2c.h>
	#include <init.h>
	#include <miiphy.h>
	#include <netdev.h>

	#include <asm/arch/clock.h>
	#include <asm/arch/imx8mm_pins.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/global_data.h>
	#include <asm/io.h>
	#include <asm/mach-imx/gpio.h>
	#include <asm/mach-imx/mxc_i2c.h>
	#include <asm/sections.h>

	#include "ddr/ddr.h"

	DECLARE_GLOBAL_DATA_PTR;

	int board_phys_sdram_size(phys_size_t *size)
	{
	struct lpddr4_tcm_desc *lpddr4_tcm_desc =
	(struct lpddr4_tcm_desc *)TCM_DATA_CFG;

	switch (lpddr4_tcm_desc->size) {
	case 4096:
	case 2048:
	case 1024:
	size = (1L << 20) lpddr4_tcm_desc->size;
	break;
	default:
	printf("%s: DRAM size %uM is not supported\n",
	__func__,
	lpddr4_tcm_desc->size);
	hang();
	break;
	};

	return 0;
	}

	/* IOT_GATE-iMX8 extension boards ID */
	typedef enum {
	IOT_GATE_EXT_EMPTY, /* No extension */
	IOT_GATE_EXT_CAN, /* CAN bus */
	IOT_GATE_EXT_IED, /* Bridge */
	IOT_GATE_EXT_POE, /* POE */
	IOT_GATE_EXT_POEV2, /* POEv2 */
	} iot_gate_imx8_ext;

	typedef enum {
	IOT_GATE_IMX8_CARD_ID_EMPTY = 0, /* card id - uninhabited */
	IOT_GATE_IMX8_CARD_ID_DI4O4 = 1, /* Card ID - IED-DI4O4 */
	IOT_GATE_IMX8_CARD_ID_RS_485 = 2, /* Card ID - IED-RS485 */
	IOT_GATE_IMX8_CARD_ID_TPM = 3, /* Card ID - IED-TPM */
	IOT_GATE_IMX8_CARD_ID_CAN = 4, /* Card ID - IED-CAN */
	IOT_GATE_IMX8_CARD_ID_CL420 = 5, /* Card ID - IED-CL420 */
	IOT_GATE_IMX8_CARD_ID_RS_232 = 6, /* Card ID - IED-RS232 */
	} iot_gate_imx8_ied_ext;

	static int setup_fec(void)
	{
	if (IS_ENABLED(CONFIG_FEC_MXC)) {
	struct iomuxc_gpr_base_regs *gpr =
	(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;

	/* Use 125M anatop REF_CLK1 for ENET1, not from external */
	clrsetbits_le32(&gpr->gpr[1], 0x2000, 0);
	}

	return 0;
	}

	int board_phy_config(struct phy_device *phydev)
	{
	if (IS_ENABLED(CONFIG_FEC_MXC)) {
	/* enable rgmii rxc skew and phy mode select to RGMII copper */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x1f);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x8);

	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x00);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x82ee);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x100);

	if (phydev->drv->config)
	phydev->drv->config(phydev);
	}
	return 0;
	}

	int board_init(void)
	{
	if (IS_ENABLED(CONFIG_FEC_MXC))
	setup_fec();

	return 0;
	}

	int board_mmc_get_env_dev(int devno)
	{
	return devno;
	}

	#define IOT_GATE_IMX8_EXT_I2C 3 /* I2C ID of the extension board */
	#define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM 0x54 /* I2C address of the EEPROM */

	/* I2C address of the EEPROM in the POE extension */
	#define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POE 0x50
	#define IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POEV2 0x51
	#define IOT_GATE_IMX8_EXT_I2C_ADDR_GPIO 0x22 /* I2C address of the GPIO
	extender */

	static int iot_gate_imx8_ext_id = IOT_GATE_EXT_EMPTY; /* Extension board ID */
	static int iot_gate_imx8_ext_ied_id [3] = {
	IOT_GATE_IMX8_CARD_ID_EMPTY,
	IOT_GATE_IMX8_CARD_ID_EMPTY,
	IOT_GATE_IMX8_CARD_ID_EMPTY };

	/*
	* iot_gate_imx8_detect_ext() - extended board detection
	* The detection is done according to the detected I2C devices.
	*/
	static void iot_gate_imx8_detect_ext(void)
	{
	int ret;
	struct udevice i2c_bus, i2c_dev;

	ret = uclass_get_device_by_seq(UCLASS_I2C, IOT_GATE_IMX8_EXT_I2C,
	&i2c_bus);
	if (ret) {
	printf("%s: Failed getting i2c device\n", __func__);
	return;
	}

	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POE, 0,
	&i2c_dev);
	if (!ret) {
	iot_gate_imx8_ext_id = IOT_GATE_EXT_POE;
	return;
	}

	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM_POEV2, 0,
	&i2c_dev);
	if (!ret) {
	iot_gate_imx8_ext_id = IOT_GATE_EXT_POEV2;
	return;
	}

	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_EEPROM, 0,
	&i2c_dev);
	if (ret){
	iot_gate_imx8_ext_id = IOT_GATE_EXT_EMPTY;
	return;
	}
	/* Only the bridge extension includes the GPIO extender */
	ret = dm_i2c_probe(i2c_bus, IOT_GATE_IMX8_EXT_I2C_ADDR_GPIO, 0,
	&i2c_dev);
	if (ret) /* GPIO extender not detected */
	iot_gate_imx8_ext_id = IOT_GATE_EXT_CAN;
	else /* GPIO extender detected */
	iot_gate_imx8_ext_id = IOT_GATE_EXT_IED;
	}

	static iomux_v3_cfg_t const iot_gate_imx8_ext_ied_pads[] = {
	IMX8MM_PAD_NAND_ALE_GPIO3_IO0 \| MUX_PAD_CTRL(PAD_CTL_PE),
	IMX8MM_PAD_NAND_CE0_B_GPIO3_IO1 \| MUX_PAD_CTRL(PAD_CTL_PE),
	IMX8MM_PAD_NAND_DATA00_GPIO3_IO6 \| MUX_PAD_CTRL(PAD_CTL_PE),
	IMX8MM_PAD_NAND_DATA01_GPIO3_IO7 \| MUX_PAD_CTRL(PAD_CTL_PE),
	IMX8MM_PAD_NAND_DATA02_GPIO3_IO8 \| MUX_PAD_CTRL(PAD_CTL_PE),
	IMX8MM_PAD_NAND_DATA03_GPIO3_IO9 \| MUX_PAD_CTRL(PAD_CTL_PE),
	};

	static iomux_v3_cfg_t const iot_gate_imx8_ext_poev2_pads[] = {
	IMX8MM_PAD_SAI3_TXD_GPIO5_IO1 \| MUX_PAD_CTRL(PAD_CTL_PE \|
	PAD_CTL_PUE),
	};

	/* Extension board bridge GPIOs */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_I0 IMX_GPIO_NR(3, 0) /* IN 0 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_I1 IMX_GPIO_NR(3, 1) /* IN 1 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_I2 IMX_GPIO_NR(3, 6) /* IN 2 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_I3 IMX_GPIO_NR(3, 7) /* IN 3 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_O0 IMX_GPIO_NR(3, 8) /* OUT 0 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_O1 IMX_GPIO_NR(3, 9) /* OUT 1 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_O2 IMX_GPIO_NR(6, 9) /* OUT 2 */
	#define IOT_GATE_IMX8_GPIO_EXT_IED_O3 IMX_GPIO_NR(6, 10)/* OUT 3 */

	/* Extension board POE GPIOs */
	#define IOT_GATE_IMX8_GPIO_EXT_POE_MUX IMX_GPIO_NR(5, 1)/* USB_MUX */

	/*
	* iot_gate_imx8_update_pinmux() - update the pinmux
	* Update the pinmux according to the detected extended board.
	*/
	static void iot_gate_imx8_update_pinmux(void)
	{
	if (iot_gate_imx8_ext_id == IOT_GATE_EXT_POEV2) {
	imx_iomux_v3_setup_multiple_pads(iot_gate_imx8_ext_poev2_pads,
	ARRAY_SIZE(iot_gate_imx8_ext_poev2_pads));
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_POE_MUX, "poev2_usb-mux");
	/* Update USB MUX state */
	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_POE_MUX, 1);

	return;
	}
	if (iot_gate_imx8_ext_id != IOT_GATE_EXT_IED)
	return;

	imx_iomux_v3_setup_multiple_pads(iot_gate_imx8_ext_ied_pads,
	ARRAY_SIZE(iot_gate_imx8_ext_ied_pads));

	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I0, "ied-di4o4_i0");
	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I0);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I1, "ied-di4o4_i1");
	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I1);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I2, "ied-di4o4_i2");
	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I2);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_I3, "ied-di4o4_i3");
	gpio_direction_input(IOT_GATE_IMX8_GPIO_EXT_IED_I3);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O0, "ied-di4o4_o0");
	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O0, 0);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O1, "ied-di4o4_o1");
	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O1, 0);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O2, "ied-di4o4_o2");
	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O2, 0);
	gpio_request(IOT_GATE_IMX8_GPIO_EXT_IED_O3, "ied-di4o4_o3");
	gpio_direction_output(IOT_GATE_IMX8_GPIO_EXT_IED_O3, 0);
	}

	#define IOT_GATE_IMX8_GPIO_S0B0 IMX_GPIO_NR(6, 0) /* Slot ID slot 0 bit 0 */
	#define IOT_GATE_IMX8_GPIO_S0B1 IMX_GPIO_NR(6, 1) /* Slot ID slot 0 bit 1 */
	#define IOT_GATE_IMX8_GPIO_S0B2 IMX_GPIO_NR(6, 2) /* Slot ID slot 0 bit 2 */
	#define IOT_GATE_IMX8_GPIO_S1B0 IMX_GPIO_NR(6, 3) /* Slot ID slot 1 bit 0 */
	#define IOT_GATE_IMX8_GPIO_S1B1 IMX_GPIO_NR(6, 4) /* Slot ID slot 1 bit 1 */
	#define IOT_GATE_IMX8_GPIO_S1B2 IMX_GPIO_NR(6, 5) /* Slot ID slot 1 bit 2 */
	#define IOT_GATE_IMX8_GPIO_S2B0 IMX_GPIO_NR(6, 6) /* Slot ID slot 2 bit 0 */
	#define IOT_GATE_IMX8_GPIO_S2B1 IMX_GPIO_NR(6, 7) /* Slot ID slot 2 bit 1 */
	#define IOT_GATE_IMX8_GPIO_S2B2 IMX_GPIO_NR(6, 8) /* Slot ID slot 2 bit 2 */

	/*
	* iot_gate_imx8_update_ext_ied()
	* Update device tree of the extended board IED-BASE.
	* The device tree is updated according to the detected sub modules.
	*
	* Return 0 for success, 1 for failure.
	*/
	static int iot_gate_imx8_update_ext_ied(void)
	{
	int revision;

	if (iot_gate_imx8_ext_id != IOT_GATE_EXT_IED)
	return 0;

	/* ID GPIO initializations */
	if (gpio_request(IOT_GATE_IMX8_GPIO_S0B0, "id_s0b0") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S0B1, "id_s0b1") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S0B2, "id_s0b2") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S1B0, "id_s1b0") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S1B1, "id_s1b1") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S1B2, "id_s1b2") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S2B0, "id_s2b0") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S2B1, "id_s2b1") \|\|
	gpio_request(IOT_GATE_IMX8_GPIO_S2B2, "id_s2b2")) {
	printf("%s: ID GPIO request failure\n", __func__);
	return 1;
	}
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B0);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B1);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S0B2);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B0);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B1);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S1B2);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B0);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B1);
	gpio_direction_input(IOT_GATE_IMX8_GPIO_S2B2);

	/* Get slot 0 card ID */
	revision = gpio_get_value(IOT_GATE_IMX8_GPIO_S0B0) \|
	gpio_get_value(IOT_GATE_IMX8_GPIO_S0B1) << 1 \|
	gpio_get_value(IOT_GATE_IMX8_GPIO_S0B2) << 2;
	iot_gate_imx8_ext_ied_id[0] = revision;

	/* Get slot 1 card ID */
	revision = gpio_get_value(IOT_GATE_IMX8_GPIO_S1B0) \|
	gpio_get_value(IOT_GATE_IMX8_GPIO_S1B1) << 1 \|
	gpio_get_value(IOT_GATE_IMX8_GPIO_S1B2) << 2;
	iot_gate_imx8_ext_ied_id[1] = revision;

	/* Get slot 2 card ID */
	revision = gpio_get_value(IOT_GATE_IMX8_GPIO_S2B0) \|
	gpio_get_value(IOT_GATE_IMX8_GPIO_S2B1) << 1 \|
	gpio_get_value(IOT_GATE_IMX8_GPIO_S2B2) << 2;
	iot_gate_imx8_ext_ied_id[2] = revision;

	return 0;
	}

	int board_fix_fdt(void *rw_fdt_blob)
	{
	return 0;
	}

	int extension_board_scan(struct list_head *extension_list)
	{
	struct extension *extension = NULL;
	int i;
	int ret = 0;

	iot_gate_imx8_detect_ext(); /* Extended board detection */

	switch(iot_gate_imx8_ext_id) {
	case IOT_GATE_EXT_EMPTY:
	break;
	case IOT_GATE_EXT_CAN:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_EXT_CAN");
	break;
	case IOT_GATE_EXT_IED:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_EXT_IED");
	snprintf(extension->overlay, sizeof(extension->overlay),
	"imx8mm-cl-iot-gate-ied.dtbo");
	break;
	case IOT_GATE_EXT_POE:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_EXT_POE");
	break;
	case IOT_GATE_EXT_POEV2:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_EXT_POEV2");
	break;
	default:
	printf("IOT_GATE-iMX8 extension board: unknown\n");
	break;
	}

	if (extension) {
	snprintf(extension->owner, sizeof(extension->owner),
	"Compulab");
	list_add_tail(&extension->list, extension_list);
	ret = 1;
	} else
	return ret;

	iot_gate_imx8_update_pinmux();

	iot_gate_imx8_update_ext_ied();
	for (i=0; i<ARRAY_SIZE(iot_gate_imx8_ext_ied_id); i++) {
	extension = NULL;
	switch (iot_gate_imx8_ext_ied_id[i]) {
	case IOT_GATE_IMX8_CARD_ID_EMPTY:
	break;
	case IOT_GATE_IMX8_CARD_ID_RS_485:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_IMX8_CARD_ID_RS_485");
	break;
	case IOT_GATE_IMX8_CARD_ID_RS_232:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_IMX8_CARD_ID_RS_232");
	break;
	case IOT_GATE_IMX8_CARD_ID_CAN:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_IMX8_CARD_ID_CAN");
	snprintf(extension->overlay, sizeof(extension->overlay),
	"imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
	break;
	case IOT_GATE_IMX8_CARD_ID_TPM:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_IMX8_CARD_ID_TPM");
	snprintf(extension->overlay, sizeof(extension->overlay),
	"imx8mm-cl-iot-gate-ied-tpm%d.dtbo", i);
	break;
	case IOT_GATE_IMX8_CARD_ID_CL420:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_IMX8_CARD_ID_CL420");
	snprintf(extension->overlay, sizeof(extension->overlay),
	"imx8mm-cl-iot-gate-ied-can%d.dtbo", i);
	break;
	case IOT_GATE_IMX8_CARD_ID_DI4O4:
	extension = calloc(1, sizeof(struct extension));
	snprintf(extension->name, sizeof(extension->name),
	"IOT_GATE_IMX8_CARD_ID_DI4O4");
	break;
	default:
	printf("%s: invalid slot %d card ID: %d\n",
	__func__, i, iot_gate_imx8_ext_ied_id[i]);
	break;
	}
	if (extension) {
	snprintf(extension->owner, sizeof(extension->owner),
	"Compulab");
	snprintf(extension->other, sizeof(extension->other),
	"On slot %d", i);
	list_add_tail(&extension->list, extension_list);
	ret = ret + 1;
	}
	}

	return ret;
	}

	int board_late_init(void)
	{
	if (IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)) {
	env_set("board_name", "IOT-GATE-IMX8");
	env_set("board_rev", "SBC-IOTMX8");
	}

	return 0;
	}