board/gateworks/venice/spl.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2021 Gateworks Corporation
  */

 #include <common.h>
 #include <cpu_func.h>
 #include <hang.h>
 #include <i2c.h>
 #include <init.h>
 #include <spl.h>
 #include <asm/mach-imx/gpio.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx8mm_pins.h>
 #include <asm/arch/imx8mn_pins.h>
 #include <asm/arch/imx8mp_pins.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/mach-imx/boot_mode.h>
 #include <asm/mach-imx/mxc_i2c.h>
 #include <asm/arch/ddr.h>
 #include <asm-generic/gpio.h>
 #include <asm/sections.h>
 #include <dm/uclass.h>
 #include <dm/device.h>
 #include <dm/pinctrl.h>
 #include <linux/delay.h>
 #include <power/bd71837.h>
 #include <power/mp5416.h>
 #include <power/pca9450.h>

 #include "eeprom.h"
 #include "lpddr4_timing.h"

 #define PCIE_RSTN IMX_GPIO_NR(4, 6)

 static void spl_dram_init(int size)
 {
 	struct dram_timing_info *dram_timing;

 	switch (size) {
 #ifdef CONFIG_IMX8MM
 	case 512:
 		dram_timing = &dram_timing_512mb;
 		break;
 	case 1024:
 		dram_timing = &dram_timing_1gb;
 		break;
 	case 2048:
 		dram_timing = &dram_timing_2gb;
 		break;
 	case 4096:
 		dram_timing = &dram_timing_4gb;
 		break;
 	default:
 		printf("Unknown DDR configuration: %d MiB\n", size);
 		dram_timing = &dram_timing_1gb;
 		size = 1024;
 #elif CONFIG_IMX8MN
 	case 1024:
 		dram_timing = &dram_timing_1gb_single_die;
 		break;
 	case 2048:
 		if (!strcmp(eeprom_get_model(), "GW7902-SP466-A") ||
 		    !strcmp(eeprom_get_model(), "GW7902-SP466-B")) {
 			dram_timing = &dram_timing_2gb_dual_die;
 		} else {
 			dram_timing = &dram_timing_2gb_single_die;
 		}
 		break;
 	default:
 		printf("Unknown DDR configuration: %d MiB\n", size);
 		dram_timing = &dram_timing_2gb_dual_die;
 		size = 2048;
 #elif CONFIG_IMX8MP
 	case 1024:
 		dram_timing = &dram_timing_1gb_single_die;
 		break;
 	case 4096:
 		dram_timing = &dram_timing_4gb_dual_die;
 		break;
 	default:
 		printf("Unknown DDR configuration: %d GiB\n", size);
 		dram_timing = &dram_timing_4gb_dual_die;
 		size = 4096;
 #endif
 	}

 	printf("DRAM    : LPDDR4 ");
 	if (size > 512)
 		printf("%d GiB", size / 1024);
 	else
 		printf("%d MiB", size);
 	printf(" %dMT/s %dMHz\n",
 	       dram_timing->fsp_msg[0].drate,
 	       dram_timing->fsp_msg[0].drate / 2);
 	ddr_init(dram_timing);
 }

 /*
  * Model specific PMIC adjustments necessary prior to DRAM init
  *
  * Note that we can not use pmic dm drivers here as we have a generic
  * venice dt that does not have board-specific pmic's defined.
  *
  * Instead we must use dm_i2c so we a helpers to give us
  * clrsetbit functions we would otherwise have if we could use PMIC dm
  * drivers.
  */
 static int dm_i2c_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
 {
 	int ret;
 	u8 val;

 	ret = dm_i2c_read(dev, reg, &val, 1);
 	if (ret)
 		return ret;
 	val = (val & ~clr) | set;

 	return dm_i2c_write(dev, reg, &val, 1);
 }

 static int power_init_board(void)
 {
 	const char *model = eeprom_get_model();
 	struct udevice *bus;
 	struct udevice *dev;
 	int ret;

 	if ((!strncmp(model, "GW71", 4)) ||
 	    (!strncmp(model, "GW72", 4)) ||
 	    (!strncmp(model, "GW73", 4)) ||
 	    (!strncmp(model, "GW7905", 6))) {
 		ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
 		if (ret) {
 			printf("PMIC    : failed I2C1 probe: %d\n", ret);
 			return ret;
 		}
 		ret = dm_i2c_probe(bus, 0x69, 0, &dev);
 		if (ret) {
 			printf("PMIC    : failed probe: %d\n", ret);
 			return ret;
 		}
 #ifdef CONFIG_IMX8MM
 		puts("PMIC    : MP5416 (IMX8MM)\n");

 		/* set VDD_ARM SW3 to 0.92V for 1.6GHz */
 		dm_i2c_reg_write(dev, MP5416_VSET_SW3,
 				 BIT(7) | MP5416_VSET_SW3_SVAL(920000));
 #elif CONFIG_IMX8MP
 		puts("PMIC    : MP5416 (IMX8MP)\n");

 		/* set VDD_ARM SW3 to 0.95V for 1.6GHz */
 		dm_i2c_reg_write(dev, MP5416_VSET_SW3,
 				 BIT(7) | MP5416_VSET_SW3_SVAL(950000));
 		/* set VDD_SOC SW1 to 0.95V for 1.6GHz */
 		dm_i2c_reg_write(dev, MP5416_VSET_SW1,
 				 BIT(7) | MP5416_VSET_SW1_SVAL(950000));
 #endif
 	}

 	else if (!strncmp(model, "GW74", 4)) {
 		ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
 		if (ret) {
 			printf("PMIC    : failed I2C1 probe: %d\n", ret);
 			return ret;
 		}
 		ret = dm_i2c_probe(bus, 0x25, 0, &dev);
 		if (ret) {
 			printf("PMIC    : failed probe: %d\n", ret);
 			return ret;
 		}
 		puts("PMIC    : PCA9450\n");

 		/* BUCKxOUT_DVS0/1 control BUCK123 output */
 		dm_i2c_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);

 		/* Buck 1 DVS control through PMIC_STBY_REQ */
 		dm_i2c_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);

 		/* Set DVS1 to 0.85v for suspend */
 		dm_i2c_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x14);

 		/* increase VDD_SOC to 0.95V before first DRAM access */
 		dm_i2c_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x1C);

 		/* Kernel uses OD/OD freq for SOC */
 		/* To avoid timing risk from SOC to ARM, increase VDD_ARM to OD voltage 0.95v */
 		dm_i2c_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x1C);
 	}

 	else if ((!strncmp(model, "GW7901", 6)) ||
 		 (!strncmp(model, "GW7902", 6)) ||
 		 (!strncmp(model, "GW7903", 6)) ||
 		 (!strncmp(model, "GW7904", 6))) {
 		if (!strncmp(model, "GW7902", 6))
 			ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
 		else
 			ret = uclass_get_device_by_seq(UCLASS_I2C, 1, &bus);
 		if (ret) {
 			printf("PMIC    : failed I2C2 probe: %d\n", ret);
 			return ret;
 		}
 		ret = dm_i2c_probe(bus, 0x4b, 0, &dev);
 		if (ret) {
 			printf("PMIC    : failed probe: %d\n", ret);
 			return ret;
 		}
 		puts("PMIC    : BD71847\n");

 		/* unlock the PMIC regs */
 		dm_i2c_reg_write(dev, BD718XX_REGLOCK, 0x1);

 		/* set switchers to forced PWM mode */
 		dm_i2c_clrsetbits(dev, BD718XX_BUCK1_CTRL, 0, 0x8);
 		dm_i2c_clrsetbits(dev, BD718XX_BUCK2_CTRL, 0, 0x8);
 		dm_i2c_clrsetbits(dev, BD718XX_1ST_NODVS_BUCK_CTRL, 0, 0x8);
 		dm_i2c_clrsetbits(dev, BD718XX_2ND_NODVS_BUCK_CTRL, 0, 0x8);
 		dm_i2c_clrsetbits(dev, BD718XX_3RD_NODVS_BUCK_CTRL, 0, 0x8);
 		dm_i2c_clrsetbits(dev, BD718XX_4TH_NODVS_BUCK_CTRL, 0, 0x8);

 		/* increase VDD_0P95 (VDD_GPU/VPU/DRAM) to 0.975v for 1.5Ghz DDR */
 		dm_i2c_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83);

 		/* increase VDD_SOC to 0.85v before first DRAM access */
 		dm_i2c_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f);

 		/* increase VDD_ARM to 0.92v for 800 and 1600Mhz */
 		dm_i2c_reg_write(dev, BD718XX_BUCK2_VOLT_RUN, 0x16);

 		/* Lock the PMIC regs */
 		dm_i2c_reg_write(dev, BD718XX_REGLOCK, 0x11);
 	}

 	return 0;
 }

 void board_init_f(ulong dummy)
 {
 	struct udevice *bus, *dev;
 	int i, ret;
 	int dram_sz;

 	arch_cpu_init();

 	init_uart_clk(1);

 	timer_init();

 	/* Clear the BSS. */
 	memset(__bss_start, 0, __bss_end - __bss_start);

 	ret = spl_early_init();
 	if (ret) {
 		debug("spl_early_init() failed: %d\n", ret);
 		hang();
 	}

 	preloader_console_init();

 	enable_tzc380();

 	/* need to hold PCIe switch in reset otherwise it can lock i2c bus EEPROM is on */
 	gpio_request(PCIE_RSTN, "perst#");
 	gpio_direction_output(PCIE_RSTN, 0);

 	/*
 	 * probe GSC device
 	 *
 	 * On a board with a missing/depleted backup battery for GSC, the
 	 * board may be ready to probe the GSC before its firmware is
 	 * running. Wait here for 50ms for the GSC firmware to let go of
 	 * the SCL/SDA lines to avoid the i2c driver spamming
 	 * 'Arbitration lost' I2C errors
 	 */
 	if (!uclass_get_device_by_seq(UCLASS_I2C, 0, &bus)) {
 		if (!pinctrl_select_state(bus, "gpio")) {
 			struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
 			struct gpio_desc *scl_gpio = &i2c_bus->scl_gpio;
 			struct gpio_desc *sda_gpio = &i2c_bus->sda_gpio;

 			dm_gpio_set_dir_flags(scl_gpio, GPIOD_IS_IN);
 			dm_gpio_set_dir_flags(sda_gpio, GPIOD_IS_IN);
 			for (i = 0; i < 5; i++) {
 				if (dm_gpio_get_value(scl_gpio) &&
 				    dm_gpio_get_value(sda_gpio))
 					break;
 				mdelay(10);
 			}
 			pinctrl_select_state(bus, "default");
 		}
 	}
 	/* Wait indefiniately until the GSC probes */
 	while (1) {
 		if (!uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(gsc), &dev))
 			break;
 		mdelay(1);
 	}
 	dram_sz = venice_eeprom_init(0);

 	/* PMIC */
 	power_init_board();

 	/* DDR initialization */
 	spl_dram_init(dram_sz);

 	board_init_r(NULL, 0);
 }

 /* determine prioritized order of boot devices to load U-Boot from */
 void board_boot_order(u32 *spl_boot_list)
 {
 	int i = 0;

 	/*
 	 * If the SPL was loaded via serial loader, we try to get
 	 * U-Boot proper via USB SDP.
 	 */
 	if (spl_boot_device() == BOOT_DEVICE_BOARD) {
 #ifdef CONFIG_IMX8MM
 		spl_boot_list[i++] = BOOT_DEVICE_BOARD;
 #else
 		spl_boot_list[i++] = BOOT_DEVICE_BOOTROM;
 #endif
 	}

 	/* we have only eMMC in default venice dt */
 	spl_boot_list[i++] = BOOT_DEVICE_MMC1;
 }

 /* return boot device based on where the SPL was loaded from */
 int spl_board_boot_device(enum boot_device boot_dev_spl)
 {
 	switch (boot_dev_spl) {
 	case USB_BOOT:
 		return BOOT_DEVICE_BOARD;
 	/* SDHC2 */
 	case SD2_BOOT:
 	case MMC2_BOOT:
 		return BOOT_DEVICE_MMC1;
 	/* SDHC3 */
 	case SD3_BOOT:
 	case MMC3_BOOT:
 		return BOOT_DEVICE_MMC2;
 	default:
 		return BOOT_DEVICE_NONE;
 	}
 }

 unsigned long spl_mmc_get_uboot_raw_sector(struct mmc *mmc, unsigned long raw_sect)
 {
 	if (!IS_SD(mmc)) {
 		switch (EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config)) {
 		case 1:
 		case 2:
 			if (IS_ENABLED(CONFIG_IMX8MN) || IS_ENABLED(CONFIG_IMX8MP))
 				raw_sect -= 32 * 2;
 			break;
 		}
 	}

 	return raw_sect;
 }

 const char *spl_board_loader_name(u32 boot_device)
 {
 	switch (boot_device) {
 	/* SDHC2 */
 	case BOOT_DEVICE_MMC1:
 		return "eMMC";
 	/* SDHC3 */
 	case BOOT_DEVICE_MMC2:
 		return "SD card";
 	default:
 		return NULL;
 	}
 }

 void spl_board_init(void)
 {
 	arch_misc_init();
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2021 Gateworks Corporation
	*/

	#include <common.h>
	#include <cpu_func.h>
	#include <hang.h>
	#include <i2c.h>
	#include <init.h>
	#include <spl.h>
	#include <asm/mach-imx/gpio.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/imx8mm_pins.h>
	#include <asm/arch/imx8mn_pins.h>
	#include <asm/arch/imx8mp_pins.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/mach-imx/boot_mode.h>
	#include <asm/mach-imx/mxc_i2c.h>
	#include <asm/arch/ddr.h>
	#include <asm-generic/gpio.h>
	#include <asm/sections.h>
	#include <dm/uclass.h>
	#include <dm/device.h>
	#include <dm/pinctrl.h>
	#include <linux/delay.h>
	#include <power/bd71837.h>
	#include <power/mp5416.h>
	#include <power/pca9450.h>

	#include "eeprom.h"
	#include "lpddr4_timing.h"

	#define PCIE_RSTN IMX_GPIO_NR(4, 6)

	static void spl_dram_init(int size)
	{
	struct dram_timing_info *dram_timing;

	switch (size) {
	#ifdef CONFIG_IMX8MM
	case 512:
	dram_timing = &dram_timing_512mb;
	break;
	case 1024:
	dram_timing = &dram_timing_1gb;
	break;
	case 2048:
	dram_timing = &dram_timing_2gb;
	break;
	case 4096:
	dram_timing = &dram_timing_4gb;
	break;
	default:
	printf("Unknown DDR configuration: %d MiB\n", size);
	dram_timing = &dram_timing_1gb;
	size = 1024;
	#elif CONFIG_IMX8MN
	case 1024:
	dram_timing = &dram_timing_1gb_single_die;
	break;
	case 2048:
	if (!strcmp(eeprom_get_model(), "GW7902-SP466-A") \|\|
	!strcmp(eeprom_get_model(), "GW7902-SP466-B")) {
	dram_timing = &dram_timing_2gb_dual_die;
	} else {
	dram_timing = &dram_timing_2gb_single_die;
	}
	break;
	default:
	printf("Unknown DDR configuration: %d MiB\n", size);
	dram_timing = &dram_timing_2gb_dual_die;
	size = 2048;
	#elif CONFIG_IMX8MP
	case 1024:
	dram_timing = &dram_timing_1gb_single_die;
	break;
	case 4096:
	dram_timing = &dram_timing_4gb_dual_die;
	break;
	default:
	printf("Unknown DDR configuration: %d GiB\n", size);
	dram_timing = &dram_timing_4gb_dual_die;
	size = 4096;
	#endif
	}

	printf("DRAM : LPDDR4 ");
	if (size > 512)
	printf("%d GiB", size / 1024);
	else
	printf("%d MiB", size);
	printf(" %dMT/s %dMHz\n",
	dram_timing->fsp_msg[0].drate,
	dram_timing->fsp_msg[0].drate / 2);
	ddr_init(dram_timing);
	}

	/*
	* Model specific PMIC adjustments necessary prior to DRAM init
	*
	* Note that we can not use pmic dm drivers here as we have a generic
	* venice dt that does not have board-specific pmic's defined.
	*
	* Instead we must use dm_i2c so we a helpers to give us
	* clrsetbit functions we would otherwise have if we could use PMIC dm
	* drivers.
	*/
	static int dm_i2c_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
	{
	int ret;
	u8 val;

	ret = dm_i2c_read(dev, reg, &val, 1);
	if (ret)
	return ret;
	val = (val & ~clr) \| set;

	return dm_i2c_write(dev, reg, &val, 1);
	}

	static int power_init_board(void)
	{
	const char *model = eeprom_get_model();
	struct udevice *bus;
	struct udevice *dev;
	int ret;

	if ((!strncmp(model, "GW71", 4)) \|\|
	(!strncmp(model, "GW72", 4)) \|\|
	(!strncmp(model, "GW73", 4)) \|\|
	(!strncmp(model, "GW7905", 6))) {
	ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
	if (ret) {
	printf("PMIC : failed I2C1 probe: %d\n", ret);
	return ret;
	}
	ret = dm_i2c_probe(bus, 0x69, 0, &dev);
	if (ret) {
	printf("PMIC : failed probe: %d\n", ret);
	return ret;
	}
	#ifdef CONFIG_IMX8MM
	puts("PMIC : MP5416 (IMX8MM)\n");

	/* set VDD_ARM SW3 to 0.92V for 1.6GHz */
	dm_i2c_reg_write(dev, MP5416_VSET_SW3,
	BIT(7) \| MP5416_VSET_SW3_SVAL(920000));
	#elif CONFIG_IMX8MP
	puts("PMIC : MP5416 (IMX8MP)\n");

	/* set VDD_ARM SW3 to 0.95V for 1.6GHz */
	dm_i2c_reg_write(dev, MP5416_VSET_SW3,
	BIT(7) \| MP5416_VSET_SW3_SVAL(950000));
	/* set VDD_SOC SW1 to 0.95V for 1.6GHz */
	dm_i2c_reg_write(dev, MP5416_VSET_SW1,
	BIT(7) \| MP5416_VSET_SW1_SVAL(950000));
	#endif
	}

	else if (!strncmp(model, "GW74", 4)) {
	ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
	if (ret) {
	printf("PMIC : failed I2C1 probe: %d\n", ret);
	return ret;
	}
	ret = dm_i2c_probe(bus, 0x25, 0, &dev);
	if (ret) {
	printf("PMIC : failed probe: %d\n", ret);
	return ret;
	}
	puts("PMIC : PCA9450\n");

	/* BUCKxOUT_DVS0/1 control BUCK123 output */
	dm_i2c_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);

	/* Buck 1 DVS control through PMIC_STBY_REQ */
	dm_i2c_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);

	/* Set DVS1 to 0.85v for suspend */
	dm_i2c_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x14);

	/* increase VDD_SOC to 0.95V before first DRAM access */
	dm_i2c_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x1C);

	/* Kernel uses OD/OD freq for SOC */
	/* To avoid timing risk from SOC to ARM, increase VDD_ARM to OD voltage 0.95v */
	dm_i2c_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x1C);
	}

	else if ((!strncmp(model, "GW7901", 6)) \|\|
	(!strncmp(model, "GW7902", 6)) \|\|
	(!strncmp(model, "GW7903", 6)) \|\|
	(!strncmp(model, "GW7904", 6))) {
	if (!strncmp(model, "GW7902", 6))
	ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
	else
	ret = uclass_get_device_by_seq(UCLASS_I2C, 1, &bus);
	if (ret) {
	printf("PMIC : failed I2C2 probe: %d\n", ret);
	return ret;
	}
	ret = dm_i2c_probe(bus, 0x4b, 0, &dev);
	if (ret) {
	printf("PMIC : failed probe: %d\n", ret);
	return ret;
	}
	puts("PMIC : BD71847\n");

	/* unlock the PMIC regs */
	dm_i2c_reg_write(dev, BD718XX_REGLOCK, 0x1);

	/* set switchers to forced PWM mode */
	dm_i2c_clrsetbits(dev, BD718XX_BUCK1_CTRL, 0, 0x8);
	dm_i2c_clrsetbits(dev, BD718XX_BUCK2_CTRL, 0, 0x8);
	dm_i2c_clrsetbits(dev, BD718XX_1ST_NODVS_BUCK_CTRL, 0, 0x8);
	dm_i2c_clrsetbits(dev, BD718XX_2ND_NODVS_BUCK_CTRL, 0, 0x8);
	dm_i2c_clrsetbits(dev, BD718XX_3RD_NODVS_BUCK_CTRL, 0, 0x8);
	dm_i2c_clrsetbits(dev, BD718XX_4TH_NODVS_BUCK_CTRL, 0, 0x8);

	/* increase VDD_0P95 (VDD_GPU/VPU/DRAM) to 0.975v for 1.5Ghz DDR */
	dm_i2c_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83);

	/* increase VDD_SOC to 0.85v before first DRAM access */
	dm_i2c_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f);

	/* increase VDD_ARM to 0.92v for 800 and 1600Mhz */
	dm_i2c_reg_write(dev, BD718XX_BUCK2_VOLT_RUN, 0x16);

	/* Lock the PMIC regs */
	dm_i2c_reg_write(dev, BD718XX_REGLOCK, 0x11);
	}

	return 0;
	}

	void board_init_f(ulong dummy)
	{
	struct udevice bus, dev;
	int i, ret;
	int dram_sz;

	arch_cpu_init();

	init_uart_clk(1);

	timer_init();

	/* Clear the BSS. */
	memset(__bss_start, 0, __bss_end - __bss_start);

	ret = spl_early_init();
	if (ret) {
	debug("spl_early_init() failed: %d\n", ret);
	hang();
	}

	preloader_console_init();

	enable_tzc380();

	/* need to hold PCIe switch in reset otherwise it can lock i2c bus EEPROM is on */
	gpio_request(PCIE_RSTN, "perst#");
	gpio_direction_output(PCIE_RSTN, 0);

	/*
	* probe GSC device
	*
	* On a board with a missing/depleted backup battery for GSC, the
	* board may be ready to probe the GSC before its firmware is
	* running. Wait here for 50ms for the GSC firmware to let go of
	* the SCL/SDA lines to avoid the i2c driver spamming
	* 'Arbitration lost' I2C errors
	*/
	if (!uclass_get_device_by_seq(UCLASS_I2C, 0, &bus)) {
	if (!pinctrl_select_state(bus, "gpio")) {
	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
	struct gpio_desc *scl_gpio = &i2c_bus->scl_gpio;
	struct gpio_desc *sda_gpio = &i2c_bus->sda_gpio;

	dm_gpio_set_dir_flags(scl_gpio, GPIOD_IS_IN);
	dm_gpio_set_dir_flags(sda_gpio, GPIOD_IS_IN);
	for (i = 0; i < 5; i++) {
	if (dm_gpio_get_value(scl_gpio) &&
	dm_gpio_get_value(sda_gpio))
	break;
	mdelay(10);
	}
	pinctrl_select_state(bus, "default");
	}
	}
	/* Wait indefiniately until the GSC probes */
	while (1) {
	if (!uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(gsc), &dev))
	break;
	mdelay(1);
	}
	dram_sz = venice_eeprom_init(0);

	/* PMIC */
	power_init_board();

	/* DDR initialization */
	spl_dram_init(dram_sz);

	board_init_r(NULL, 0);
	}

	/* determine prioritized order of boot devices to load U-Boot from */
	void board_boot_order(u32 *spl_boot_list)
	{
	int i = 0;

	/*
	* If the SPL was loaded via serial loader, we try to get
	* U-Boot proper via USB SDP.
	*/
	if (spl_boot_device() == BOOT_DEVICE_BOARD) {
	#ifdef CONFIG_IMX8MM
	spl_boot_list[i++] = BOOT_DEVICE_BOARD;
	#else
	spl_boot_list[i++] = BOOT_DEVICE_BOOTROM;
	#endif
	}

	/* we have only eMMC in default venice dt */
	spl_boot_list[i++] = BOOT_DEVICE_MMC1;
	}

	/* return boot device based on where the SPL was loaded from */
	int spl_board_boot_device(enum boot_device boot_dev_spl)
	{
	switch (boot_dev_spl) {
	case USB_BOOT:
	return BOOT_DEVICE_BOARD;
	/* SDHC2 */
	case SD2_BOOT:
	case MMC2_BOOT:
	return BOOT_DEVICE_MMC1;
	/* SDHC3 */
	case SD3_BOOT:
	case MMC3_BOOT:
	return BOOT_DEVICE_MMC2;
	default:
	return BOOT_DEVICE_NONE;
	}
	}

	unsigned long spl_mmc_get_uboot_raw_sector(struct mmc *mmc, unsigned long raw_sect)
	{
	if (!IS_SD(mmc)) {
	switch (EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config)) {
	case 1:
	case 2:
	if (IS_ENABLED(CONFIG_IMX8MN) \|\| IS_ENABLED(CONFIG_IMX8MP))
	raw_sect -= 32 * 2;
	break;
	}
	}

	return raw_sect;
	}

	const char *spl_board_loader_name(u32 boot_device)
	{
	switch (boot_device) {
	/* SDHC2 */
	case BOOT_DEVICE_MMC1:
	return "eMMC";
	/* SDHC3 */
	case BOOT_DEVICE_MMC2:
	return "SD card";
	default:
	return NULL;
	}
	}

	void spl_board_init(void)
	{
	arch_misc_init();
	}