board: purism: add the Purism Librem5 phone

Initial commit of Librem5 u-boot and SPL

Signed-off-by: Angus Ainslie <angus@akkea.ca>
Co-developed-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Reviewed-by: Fabio Estevam <festevam@denx.de>

arch/arm/dts/Makefile

@@ -974,7 +974,8 @@ dtb-$(CONFIG_ARCH_IMX8M) += \
 	imx8mp-venice-gw74xx.dtb \
 	imx8mp-verdin-wifi-dev.dtb \
 	imx8mq-pico-pi.dtb \
-	imx8mq-kontron-pitx-imx8m.dtb
+	imx8mq-kontron-pitx-imx8m.dtb \
+	imx8mq-librem5-r4.dtb
 
 dtb-$(CONFIG_ARCH_IMX9) += \
 	imx93-11x11-evk.dtb

arch/arm/dts/imx8mq-librem5-r4-u-boot.dtsi

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+#include "imx8mq-u-boot.dtsi"
+
+&pinctrl_uart1 {
+	u-boot,dm-spl;
+};
+
+&uart1 { /* console */
+	u-boot,dm-spl;
+};
+
+&binman {
+	/delete-node/ signed-hdmi;
+
+	signed-hdmi {
+		filename = "signed_hdmi.bin";
+
+		signed-dp-imx8m {
+			filename = "signed_dp_imx8m.bin";
+			type = "blob-ext";
+		};
+	};
+};

arch/arm/dts/imx8mq-librem5-r4.dts

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+// Copyright (C) 2020 Purism SPC <kernel@puri.sm>
+
+/dts-v1/;
+
+#include "imx8mq-librem5.dtsi"
+
+/ {
+	model = "Purism Librem 5r4";
+	compatible = "purism,librem5r4", "purism,librem5", "fsl,imx8mq";
+};
+
+&accel_gyro {
+	mount-matrix =  "1",  "0",  "0",
+			"0",  "1",  "0",
+			"0",  "0", "-1";
+};
+
+&bat {
+	maxim,rsns-microohm = <1667>;
+};
+
+&bq25895 {
+	ti,battery-regulation-voltage = <4200000>; /* uV */
+	ti,charge-current = <1500000>; /* uA */
+	ti,termination-current = <144000>;  /* uA */
+};
+
+&led_backlight {
+	led-max-microamp = <25000>;
+};
+
+&proximity {
+	proximity-near-level = <10>;
+};

arch/arm/mach-imx/imx8m/Kconfig

@@ -269,6 +269,14 @@ config TARGET_IMX8MP_RSB3720A1_6G
 	select IMX8MP
 	select SUPPORT_SPL
 	select IMX8M_LPDDR4
+
+config TARGET_LIBREM5
+	bool "Purism Librem5 Phone"
+	select BINMAN
+	select IMX8MQ
+	select SUPPORT_SPL
+	select IMX8M_LPDDR4
+
 endchoice
 
 source "board/advantech/imx8mp_rsb3720a1/Kconfig"
@@ -290,6 +298,7 @@ source "board/kontron/sl-mx8mm/Kconfig"
 source "board/menlo/mx8menlo/Kconfig"
 source "board/phytec/phycore_imx8mm/Kconfig"
 source "board/phytec/phycore_imx8mp/Kconfig"
+source "board/purism/librem5/Kconfig"
 source "board/ronetix/imx8mq-cm/Kconfig"
 source "board/technexion/pico-imx8mq/Kconfig"
 source "board/variscite/imx8mn_var_som/Kconfig"

board/purism/librem5/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_LIBREM5
+
+config SYS_BOARD
+	default "librem5"
+
+config SYS_VENDOR
+	default "purism"
+
+config SYS_CONFIG_NAME
+	default "librem5"
+
+config IMX_CONFIG
+	default "board/purism/librem5/imximage-8mq-lpddr4.cfg"
+
+endif

board/purism/librem5/MAINTAINERS

@@ -0,0 +1,8 @@
+PURISM LIBREM5 PHONE
+M:	Angus Ainslie <angus@akkea.ca>
+R:	kernel@puri.sm
+S:	Supported
+F:	arch/arm/dts/imx8mq-librem5*
+F:	board/purism/librem5/
+F:	configs/librem5_defconfig
+F:	include/configs/librem5.h

board/purism/librem5/Makefile

@@ -0,0 +1,13 @@
+#
+# Copyright 2017 NXP
+# Copyright 2019 Purism
+#
+# SPDX-License-Identifier:      GPL-2.0+
+#
+
+obj-y += librem5.o
+
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing.o lpddr4_timing_b0.o
+endif

board/purism/librem5/imximage-8mq-lpddr4.cfg

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2021 NXP
+ */
+
+FIT
+BOOT_FROM	sd
+SIGNED_HDMI     signed_hdmi.bin
+LOADER		u-boot-spl-ddr.bin	0x7E1000

board/purism/librem5/librem5.c

@@ -0,0 +1,425 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ * Copyright 2021 Purism
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <miiphy.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm-generic/gpio.h>
+#include <asm/arch/sys_proto.h>
+#include <fsl_esdhc.h>
+#include <mmc.h>
+#include <asm/arch/imx8mq_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/arch/clock.h>
+#include <asm/mach-imx/video.h>
+#include <fuse.h>
+#include <i2c.h>
+#include <spl.h>
+#include <usb.h>
+#include <dwc3-uboot.h>
+#include <linux/delay.h>
+#include <linux/bitfield.h>
+#include <power/regulator.h>
+#include <usb/xhci.h>
+#include "librem5.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_early_init_f(void)
+{
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_LOAD_ENV_FROM_MMC_BOOT_PARTITION)
+uint board_mmc_get_env_part(struct mmc *mmc)
+{
+	uint part = (mmc->part_config >> 3) & PART_ACCESS_MASK;
+
+	if (part == 7)
+		part = 0;
+	return part;
+}
+#endif
+
+int tps65982_wait_for_app(int timeout, int timeout_step)
+{
+	int ret;
+	char response[6];
+	struct udevice *udev, *bus;
+
+	log_debug("%s: starting\n", __func__);
+
+	/* Set the i2c bus */
+	ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
+	if (ret) {
+		log_err("%s: No bus %d\n", __func__, 0);
+		return 1;
+	}
+
+	ret = i2c_get_chip(bus, 0x3f, 1, &udev);
+	if (ret) {
+		log_err("%s: setting chip offset failed %d\n", __func__, ret);
+		return 1;
+	}
+
+	while (timeout > 0) {
+		ret = dm_i2c_read(udev, 0x03, (u8 *)response, 5);
+		log_debug("tps65982 mode %s\n", response);
+		if (response[1] == 'A')
+			return 0;
+		mdelay(timeout_step);
+		timeout -= timeout_step;
+		log_debug("tps65982 waited %d ms %c\n", timeout_step, response[1]);
+	}
+
+	return 1;
+}
+
+int tps65982_clear_dead_battery(void)
+{
+	int ret;
+	char cmd[5] = "\04DBfg";
+	struct udevice *udev, *bus;
+
+	log_debug("%s: starting\n", __func__);
+
+	/* Set the i2c bus */
+	ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
+	if (ret) {
+		log_err("%s: No bus %d\n", __func__, 0);
+		return 1;
+	}
+
+	ret = i2c_get_chip(bus, 0x3f, 1, &udev);
+	if (ret) {
+		log_err("%s: setting chip offset failed %d\n", __func__, ret);
+		return 1;
+	}
+
+	/* clearing the dead battery flag when not in dead battery condition
+	 * is a no-op, so there's no need to check if it's in effect
+	 */
+	ret = dm_i2c_write(udev, 0x08, cmd, 5);
+	if (ret) {
+		log_err("%s: writing 4CC command failed %d", __func__, ret);
+		return 1;
+	}
+
+	return 0;
+}
+
+#define TPS_POWER_STATUS_PWROPMODE(x)	    FIELD_GET(GENMASK(3, 2), x)
+
+#define TPS_PDO_CONTRACT_TYPE(x)	FIELD_GET(GENMASK(31, 30), x)
+#define TPS_PDO_CONTRACT_FIXED	0
+#define TPS_PDO_CONTRACT_BATTERY	1
+#define TPS_PDO_CONTRACT_VARIABLE	2
+
+#define TPS_TYPEC_PWR_MODE_USB	0
+#define TPS_TYPEC_PWR_MODE_1_5A	1
+#define TPS_TYPEC_PWR_MODE_3_0A	2
+#define TPS_TYPEC_PWR_MODE_PD	3
+
+#define TPS_PDO_FIXED_CONTRACT_MAX_CURRENT(x)	(FIELD_GET(GENMASK(9, 0), x) * 10)
+#define TPS_PDO_VAR_CONTRACT_MAX_CURRENT(x)	(FIELD_GET(GENMASK(9, 0), x) * 10)
+#define TPS_PDO_BAT_CONTRACT_MAX_VOLTAGE(x)	(FIELD_GET(GENMASK(29, 20), x) * 50)
+#define TPS_PDO_BAT_CONTRACT_MAX_POWER(x)	(FIELD_GET(GENMASK(9, 0), x) * 250)
+
+int tps65982_get_max_current(void)
+{
+	int ret;
+	u8 buf[7];
+	u8 pwr_status;
+	u32 contract;
+	int type, mode;
+	struct udevice *udev, *bus;
+
+	log_debug("%s: starting\n", __func__);
+
+	/* Set the i2c bus */
+	ret = uclass_get_device_by_seq(UCLASS_I2C, 0, &bus);
+	if (ret) {
+		log_debug("%s: No bus %d\n", __func__, 0);
+		return -1;
+	}
+
+	ret = i2c_get_chip(bus, 0x3f, 1, &udev);
+	if (ret) {
+		log_debug("%s: setting chip offset failed %d\n", __func__, ret);
+		return -1;
+	}
+
+	ret = dm_i2c_read(udev, 0x3f, buf, 3);
+	if (ret) {
+		log_debug("%s: reading pwr_status failed %d\n", __func__, ret);
+		return -1;
+	}
+
+	pwr_status = buf[1];
+
+	if (!(pwr_status & 1))
+		return 0;
+
+	mode = TPS_POWER_STATUS_PWROPMODE(pwr_status);
+	switch (mode) {
+	case TPS_TYPEC_PWR_MODE_1_5A:
+		return 1500;
+	case TPS_TYPEC_PWR_MODE_3_0A:
+		return 3000;
+	case TPS_TYPEC_PWR_MODE_PD:
+		ret = dm_i2c_read(udev, 0x34, buf, 7);
+		if (ret) {
+			log_debug("%s: reading active contract failed %d\n", __func__, ret);
+			return -1;
+		}
+
+		contract = buf[1] + (buf[2] << 8) + (buf[3] << 16) + (buf[4] << 24);
+
+		type = TPS_PDO_CONTRACT_TYPE(contract);
+
+		switch (type) {
+		case TPS_PDO_CONTRACT_FIXED:
+			return TPS_PDO_FIXED_CONTRACT_MAX_CURRENT(contract);
+		case TPS_PDO_CONTRACT_BATTERY:
+			return 1000 * TPS_PDO_BAT_CONTRACT_MAX_POWER(contract)
+				/ TPS_PDO_BAT_CONTRACT_MAX_VOLTAGE(contract);
+		case TPS_PDO_CONTRACT_VARIABLE:
+			return TPS_PDO_VAR_CONTRACT_MAX_CURRENT(contract);
+		default:
+			log_debug("Unknown contract type: %d\n", type);
+			return -1;
+		}
+	case TPS_TYPEC_PWR_MODE_USB:
+		return 500;
+	default:
+		log_debug("Unknown power mode: %d\n", mode);
+		return -1;
+	}
+}
+
+int init_tps65982(void)
+{
+	log_debug("%s: starting\n", __func__);
+
+	if (tps65982_wait_for_app(500, 100)) {
+		log_err("tps65982 APP boot failed\n");
+		return 1;
+	}
+
+	log_info("tps65982 boot successful\n");
+	return 0;
+}
+
+int bq25895_set_iinlim(int current)
+{
+	u8 val, iinlim;
+	int ret;
+	struct udevice *udev, *bus;
+
+	/* Set the i2c bus */
+	ret = uclass_get_device_by_seq(UCLASS_I2C, 3, &bus);
+	if (ret) {
+		log_err("%s: No bus 3\n", __func__);
+		return ret;
+	}
+
+	ret = i2c_get_chip(bus, 0x6a, 1, &udev);
+	if (ret) {
+		log_err("%s: setting chip offset failed %d\n", __func__, ret);
+		return ret;
+	}
+
+	if (current > 3250)
+		current = 3250;
+	if (current < 100)
+		current = 100;
+
+	val = dm_i2c_reg_read(udev, 0x00);
+	iinlim = ((current - 100) / 50) & 0x3f;
+	val = (val & 0xc0) | iinlim;
+	dm_i2c_reg_write(udev, 0x00, val);
+	log_debug("REG00 0x%x\n", val);
+
+	return 0;
+}
+
+bool bq25895_battery_present(void)
+{
+	u8 val;
+	int ret;
+	struct udevice *udev, *bus;
+
+	/* Set the i2c bus */
+	ret = uclass_get_device_by_seq(UCLASS_I2C, 3, &bus);
+	if (ret) {
+		log_err("%s: No bus 3\n", __func__);
+		return ret;
+	}
+
+	ret = i2c_get_chip(bus, 0x6a, 1, &udev);
+	if (ret) {
+		log_err("%s: setting chip offset failed %d\n", __func__, ret);
+		return ret;
+	}
+
+	/* note that this may return false negatives when there's
+	 * no external power applied and the battery voltage is below
+	 * Vsys. this isn't a problem when used for clearing the dead
+	 * battery flag though, since it's certain that there's an external
+	 * power applied in this case
+	 */
+	val = dm_i2c_reg_read(udev, 0x0e) & 0x7f;
+	if (val == 0x00 || val == 0x7f)
+		return false;
+
+	return true;
+}
+
+/*
+ * set some safe defaults for the battery charger
+ */
+int init_charger_bq25895(void)
+{
+	u8 val;
+	int iinlim, ret;
+	struct udevice *udev, *bus;
+
+	/* Set the i2c bus */
+	ret = uclass_get_device_by_seq(UCLASS_I2C, 3, &bus);
+	if (ret) {
+		log_debug("%s: No bus 3\n", __func__);
+		return ret;
+	}
+
+	ret = i2c_get_chip(bus, 0x6a, 1, &udev);
+	if (ret) {
+		log_debug("%s: setting chip offset failed %d\n", __func__, ret);
+		return ret;
+	}
+
+	val = dm_i2c_reg_read(udev, 0x0b);
+	log_debug("REG0B 0x%x\n", val);
+
+	log_debug("VBUS_STAT 0x%x\n", val >> 5);
+	switch (val >> 5) {
+	case 0:
+		log_debug("VBUS not detected\n");
+		break;
+	case 1:
+		log_debug("USB SDP IINLIM 500mA\n");
+		break;
+	case 2:
+		log_debug("USB CDP IINLIM 1500mA\n");
+		break;
+	case 3:
+		log_debug("USB DCP IINLIM 3500mA\n");
+		break;
+	case 4:
+		log_debug("MAXCHARGE IINLIM 1500mA\n");
+		break;
+	case 5:
+		log_debug("Unknown IINLIM 500mA\n");
+		break;
+	case 6:
+		log_debug("DIVIDER IINLIM > 1000mA\n");
+		break;
+	case 7:
+		log_debug("OTG\n");
+		break;
+	};
+
+	log_debug("CHRG_STAT 0x%x\n", (val >> 3) & 0x3);
+	log_debug("PG_STAT 0x%x\n", (val >> 2) & 1);
+	log_debug("SDP_STAT 0x%x\n", (val >> 1) & 1);
+	log_debug("VSYS_STAT 0x%x\n", val & 1);
+
+	val = dm_i2c_reg_read(udev, 0x00);
+	log_debug("REG00 0x%x\n", val);
+	iinlim = 100 + (val & 0x3f) * 50;
+	log_debug("IINLIM %d mA\n", iinlim);
+	log_debug("EN_HIZ 0x%x\n", (val >> 7) & 1);
+	log_debug("EN_ILIM 0x%x\n", (val >> 6) & 1);
+
+	/* set 1.6A charge limit */
+	dm_i2c_reg_write(udev, 0x04, 0x19);
+
+	/* re-enable charger */
+	val = dm_i2c_reg_read(udev, 0x03);
+	val = val | 0x10;
+	dm_i2c_reg_write(udev, 0x03, val);
+
+	return 0;
+}
+
+int board_init(void)
+{
+	struct udevice *dev;
+	int tps_ret;
+
+	if (IS_ENABLED(CONFIG_USB_DWC3) || IS_ENABLED(CONFIG_USB_XHCI_IMX8M)) {
+		log_debug("%s: initializing USB clk\n", __func__);
+
+		/* init_usb_clk won't enable the second clock if it's a USB boot */
+		if (is_usb_boot()) {
+			clock_enable(CCGR_USB_CTRL2, 1);
+			clock_enable(CCGR_USB_PHY2, 1);
+		}
+
+		printf("Enabling regulator-hub\n");
+		if (!regulator_get_by_devname("regulator-hub", &dev)) {
+			if (regulator_set_enable(dev, true))
+				pr_err("Failed to enable regulator-hub\n");
+		}
+	}
+
+	tps_ret = init_tps65982();
+	init_charger_bq25895();
+
+	if (!tps_ret) {
+		int current = tps65982_get_max_current();
+
+		if (current > 500)
+			bq25895_set_iinlim(current);
+
+		if (bq25895_battery_present())
+			tps65982_clear_dead_battery();
+	}
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	if (IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG)) {
+		u32 rev;
+		char rev_str[3];
+
+		env_set("board_name", "librem5");
+		if (fuse_read(9, 0, &rev)) {
+			env_set("board_rev", BOARD_REV_ERROR);
+		} else if (rev == 0) {
+			env_set("board_rev", BOARD_REV_UNKNOWN);
+		} else if (rev > 0) {
+			sprintf(rev_str, "%u", rev);
+			env_set("board_rev", rev_str);
+		}
+
+		printf("Board name: %s\n", env_get("board_name"));
+		printf("Board rev:  %s\n", env_get("board_rev"));
+	}
+
+	if (is_usb_boot()) {
+		puts("USB Boot\n");
+		env_set("bootcmd", "fastboot 0");
+	}
+
+	return 0;
+}

board/purism/librem5/librem5.h

@@ -0,0 +1,181 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2021 Purism
+ */
+
+#ifndef __LIBREM5_H__
+#define __LIBREM5_H__
+
+#define CAMERA_EN IMX_GPIO_NR(1, 0)
+#define SD_EN IMX_GPIO_NR(1, 3)
+#define AUDIO_EN IMX_GPIO_NR(1, 4)
+#define DSI_EN IMX_GPIO_NR(1, 5)
+#define SMC_EN IMX_GPIO_NR(1, 6)
+#define TYPEC_MUX_EN IMX_GPIO_NR(1, 11)
+#define HUB_NRESET IMX_GPIO_NR(1, 12)
+#define HUB_EN IMX_GPIO_NR(1, 14)
+#define VOL_UP IMX_GPIO_NR(1, 16)
+#define VOL_DOWN IMX_GPIO_NR(1, 17)
+#define DSI_BIAS_EN IMX_GPIO_NR(1, 20)
+#define FLASH_EN IMX_GPIO_NR(1, 23)
+#define WWAN_NRESET IMX_GPIO_NR(3, 1)
+#define CHG_EN IMX_GPIO_NR(3, 2)
+#define CHG_OTG_OUT_EN IMX_GPIO_NR(3, 4)
+#define WIFI_EN IMX_GPIO_NR(3, 10)
+#define GPS_EN IMX_GPIO_NR(3, 12)
+#define BL_EN IMX_GPIO_NR(3, 14)
+#define WWAN_EN IMX_GPIO_NR(3, 18)
+#define NFC_EN IMX_GPIO_NR(4, 28)
+#define LED_G IMX_GPIO_NR(5, 2)
+#define LED_R IMX_GPIO_NR(5, 3)
+#define LED_B IMX_GPIO_NR(1, 13)
+#define MOTO IMX_GPIO_NR(5, 5)
+#define SPI1_SCLK IMX_GPIO_NR(5, 6)
+#define SPI1_MOSI IMX_GPIO_NR(5, 7)
+#define SPI1_MISO IMX_GPIO_NR(5, 8)
+#define SPI1_SS0 IMX_GPIO_NR(5, 9)
+
+#define UART1_TX IMX_GPIO_NR(5, 23)
+#define UART1_RX IMX_GPIO_NR(5, 22)
+#define UART2_TX IMX_GPIO_NR(5, 25)
+#define UART2_RX IMX_GPIO_NR(5, 24)
+#define UART3_TX IMX_GPIO_NR(5, 27)
+#define UART3_RX IMX_GPIO_NR(5, 26)
+#define UART4_TX IMX_GPIO_NR(5, 11)
+#define UART4_RX IMX_GPIO_NR(5, 10)
+
+#define TPS_RESET IMX_GPIO_NR(3, 24)
+
+#define PURISM_VID	0x316d
+#define PURISM_PID	0x4c05
+
+#define BOARD_REV_ERROR		"unknown"
+#define BOARD_REV_BIRCH		"1"
+#define BOARD_REV_CHESTNUT	"2"
+#define BOARD_REV_DOGWOOD	"3"
+#define BOARD_REV_EVERGREEN	"4"
+/* Could be ASPEN, BIRCH or CHESTNUT. assume CHESTNUT */
+#define BOARD_REV_UNKNOWN	BOARD_REV_CHESTNUT
+
+#ifdef CONFIG_SPL_BUILD
+static const iomux_v3_cfg_t configure_pads[] = {
+	IMX8MQ_PAD_GPIO1_IO00__GPIO1_IO0 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_GPIO1_IO03__GPIO1_IO3 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_GPIO1_IO04__GPIO1_IO4 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_GPIO1_IO05__GPIO1_IO5 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_GPIO1_IO06__GPIO1_IO6 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_GPIO1_IO11__GPIO1_IO11 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_GPIO1_IO12__GPIO1_IO12 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_GPIO1_IO13__GPIO1_IO13 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_GPIO1_IO14__GPIO1_IO14 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_ENET_MDC__GPIO1_IO16 | MUX_PAD_CTRL(PAD_CTL_PUE),
+	IMX8MQ_PAD_ENET_MDIO__GPIO1_IO17 | MUX_PAD_CTRL(PAD_CTL_PUE),
+	IMX8MQ_PAD_ENET_TD1__GPIO1_IO20 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_ENET_TXC__GPIO1_IO23 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_CE0_B__GPIO3_IO1 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_CE1_B__GPIO3_IO2 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_CE3_B__GPIO3_IO4 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_DATA04__GPIO3_IO10 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_DATA06__GPIO3_IO12 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_DQS__GPIO3_IO14 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_NAND_WP_B__GPIO3_IO18 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_SAI3_RXFS__GPIO4_IO28 | MUX_PAD_CTRL(PAD_CTL_DSE6),
+	IMX8MQ_PAD_SAI3_MCLK__GPIO5_IO2 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_SPDIF_TX__GPIO5_IO3 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+	IMX8MQ_PAD_SAI5_RXD3__GPIO3_IO24 | MUX_PAD_CTRL(PAD_CTL_DSE6) | MUX_MODE_SION,
+};
+
+static inline void init_pinmux(void)
+{
+	imx_iomux_v3_setup_multiple_pads(configure_pads, ARRAY_SIZE(configure_pads));
+
+	gpio_request(LED_R, "LED_R");
+	gpio_request(LED_G, "LED_G");
+	gpio_request(LED_B, "LED_B");
+	gpio_request(VOL_UP, "VOL_UP");
+	gpio_request(VOL_DOWN, "VOL_DOWN");
+
+	gpio_request(NFC_EN, "NFC_EN");
+	gpio_request(CHG_EN, "CHG_EN");
+	gpio_request(CHG_OTG_OUT_EN, "CHG_OTG_OUT_EN");
+
+	gpio_request(TYPEC_MUX_EN, "TYPEC_MUX_EN");
+
+	gpio_request(TPS_RESET, "TPS_RESET");
+
+	gpio_request(WWAN_EN, "WWAN_EN");
+	gpio_request(WWAN_NRESET, "WWAN_NRESET");
+
+	gpio_request(HUB_EN, "HUB_EN");
+	gpio_request(HUB_NRESET, "HUB_NRESET");
+	gpio_request(SD_EN, "SD_EN");
+	gpio_request(AUDIO_EN, "AUDIO_EN");
+	gpio_request(DSI_EN, "DSI_EN");
+	gpio_request(SMC_EN, "SMC_EN");
+	gpio_request(CAMERA_EN, "CAMERA_EN");
+	gpio_request(FLASH_EN, "FLASH_EN");
+	gpio_request(DSI_BIAS_EN, "DSI_BIAS_EN");
+	gpio_request(GPS_EN, "GPS_EN");
+	gpio_request(BL_EN, "BL_EN");
+#ifndef CONSOLE_ON_UART4
+	gpio_request(WIFI_EN, "WIFI_EN");
+	gpio_direction_output(WIFI_EN, 0);
+#endif /* CONSOLE_ON_UART4 */
+	gpio_direction_input(VOL_UP);
+	gpio_direction_input(VOL_DOWN);
+
+	/* ensure charger is in the automated mode */
+	gpio_direction_output(NFC_EN, 0);
+	gpio_direction_output(CHG_EN, 0);
+	gpio_direction_output(CHG_OTG_OUT_EN, 0);
+
+	gpio_direction_input(TYPEC_MUX_EN);
+
+	gpio_direction_output(TPS_RESET, 0);
+
+	gpio_direction_output(WWAN_EN, 0);
+	gpio_direction_output(WWAN_NRESET, 1);
+
+	gpio_direction_output(HUB_EN, 1);
+	gpio_direction_output(HUB_NRESET, 1);
+	mdelay(10);
+	gpio_direction_output(SD_EN, 1);
+	gpio_direction_output(SMC_EN, 0);
+	gpio_direction_output(CAMERA_EN, 0);
+	gpio_direction_output(FLASH_EN, 0);
+	gpio_direction_output(DSI_BIAS_EN, 0);
+	gpio_direction_output(GPS_EN, 0);
+	gpio_direction_output(BL_EN, 0);
+
+	/* turn these on for i2c busses */
+	gpio_direction_output(AUDIO_EN, 1);
+	gpio_direction_output(DSI_EN, 1);
+}
+#endif /* CONFIG_SPL_BUILD */
+
+#define USB1_BASE_ADDR         0x38100000
+#define USB2_BASE_ADDR         0x38200000
+#define USB1_PHY_BASE_ADDR     0x381F0000
+#define USB2_PHY_BASE_ADDR     0x382F0000
+
+#define USB_PHY_CTRL0			0xF0040
+#define USB_PHY_CTRL0_REF_SSP_EN	BIT(2)
+#define USB_PHY_CTRL0_SSC_RANGE_MASK	GENMASK(23, 21)
+#define USB_PHY_CTRL0_SSC_RANGE_4003PPM	(0x2 << 21)
+
+#define USB_PHY_CTRL1			0xF0044
+#define USB_PHY_CTRL1_RESET		BIT(0)
+#define USB_PHY_CTRL1_COMMONONN		BIT(1)
+#define USB_PHY_CTRL1_ATERESET		BIT(3)
+#define USB_PHY_CTRL1_VDATSRCENB0	BIT(19)
+#define USB_PHY_CTRL1_VDATDETENB0	BIT(20)
+
+#define USB_PHY_CTRL2			0xF0048
+#define USB_PHY_CTRL2_TXENABLEN0	BIT(8)
+
+#define USB_PHY_CTRL6			0x18
+#define USB_PHY_CTRL6_RXTERM_OVERRIDE_SEL	BIT(29)
+
+extern struct dram_timing_info dram_timing_b0;
+
+#endif

board/purism/librem5/spl.c

@@ -0,0 +1,592 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ * Copyright 2021 Purism
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx8mq_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/clock.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <fsl_esdhc_imx.h>
+#include <mmc.h>
+#include <power/pmic.h>
+#include <power/bd71837.h>
+#include <hang.h>
+#include <init.h>
+#include <spl.h>
+#include <usb.h>
+#include <dwc3-uboot.h>
+#include <linux/delay.h>
+#include "librem5.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void spl_dram_init(void)
+{
+	/* ddr init */
+	if ((get_cpu_rev() & 0xfff) == CHIP_REV_2_1)
+		ddr_init(&dram_timing);
+	else
+		ddr_init(&dram_timing_b0);
+}
+
+int spl_board_boot_device(enum boot_device boot_dev_spl)
+{
+	log_debug("%s : starting\n", __func__);
+
+	switch (boot_dev_spl) {
+	case SD1_BOOT:
+	case MMC1_BOOT:
+		return BOOT_DEVICE_MMC1;
+	case USB_BOOT:
+		return BOOT_DEVICE_BOARD;
+	default:
+		return BOOT_DEVICE_NONE;
+	}
+}
+
+#define ECSPI_PAD_CTRL (PAD_CTL_DSE2 | PAD_CTL_HYS)
+
+static const iomux_v3_cfg_t ecspi_pads[] = {
+	IMX8MQ_PAD_ECSPI1_SCLK__ECSPI1_SCLK | MUX_PAD_CTRL(ECSPI_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI1_SS0__GPIO5_IO9 | MUX_PAD_CTRL(ECSPI_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI1_MOSI__ECSPI1_MOSI | MUX_PAD_CTRL(ECSPI_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI1_MISO__ECSPI1_MISO | MUX_PAD_CTRL(ECSPI_PAD_CTRL),
+};
+
+int board_ecspi_init(void)
+{
+	imx_iomux_v3_setup_multiple_pads(ecspi_pads, ARRAY_SIZE(ecspi_pads));
+
+	return 0;
+}
+
+int board_spi_cs_gpio(unsigned int bus, unsigned int cs)
+{
+	return (bus == 0 && cs == 0) ? (SPI1_SS0) : -1;
+}
+
+#define I2C_PAD_CTRL	(PAD_CTL_PUE | PAD_CTL_ODE | PAD_CTL_DSE7 | PAD_CTL_FSEL3)
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C1_SCL__I2C1_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C1_SCL__GPIO5_IO14 | PC,
+		.gp = IMX_GPIO_NR(5, 14),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C1_SDA__I2C1_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C1_SDA__GPIO5_IO15 | PC,
+		.gp = IMX_GPIO_NR(5, 15),
+	},
+};
+
+struct i2c_pads_info i2c_pad_info2 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C2_SCL__I2C2_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C2_SCL__GPIO5_IO16 | PC,
+		.gp = IMX_GPIO_NR(5, 16),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C2_SDA__I2C2_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C2_SDA__GPIO5_IO17 | PC,
+		.gp = IMX_GPIO_NR(5, 17),
+	},
+};
+
+struct i2c_pads_info i2c_pad_info3 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C3_SCL__I2C3_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C3_SCL__GPIO5_IO18 | PC,
+		.gp = IMX_GPIO_NR(5, 18),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C3_SDA__I2C3_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C3_SDA__GPIO5_IO19 | PC,
+		.gp = IMX_GPIO_NR(5, 19),
+	},
+};
+
+struct i2c_pads_info i2c_pad_info4 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C4_SCL__I2C4_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C4_SCL__GPIO5_IO20 | PC,
+		.gp = IMX_GPIO_NR(5, 20),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C4_SDA__I2C4_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C4_SDA__GPIO5_IO21 | PC,
+		.gp = IMX_GPIO_NR(5, 21),
+	},
+};
+
+#define UART_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_FSEL1)
+
+static const iomux_v3_cfg_t uart_pads[] = {
+	IMX8MQ_PAD_UART1_RXD__UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART1_TXD__UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART2_RXD__UART2_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART2_TXD__UART2_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART3_RXD__UART3_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART3_TXD__UART3_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI2_SCLK__UART4_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI2_MOSI__UART4_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+#define USDHC1_PWR_GPIO IMX_GPIO_NR(2, 10)
+#define USDHC2_PWR_GPIO IMX_GPIO_NR(2, 19)
+
+int board_mmc_getcd(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret = 0;
+
+	switch (cfg->esdhc_base) {
+	case USDHC1_BASE_ADDR:
+		ret = 1;
+		break;
+	case USDHC2_BASE_ADDR:
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+#define USDHC_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | \
+			 PAD_CTL_FSEL1)
+#define USDHC_GPIO_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_DSE1)
+
+static const iomux_v3_cfg_t usdhc1_pads[] = {
+	IMX8MQ_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA4__USDHC1_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA5__USDHC1_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA6__USDHC1_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA7__USDHC1_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_RESET_B__GPIO2_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static const iomux_v3_cfg_t usdhc2_pads[] = {
+	IMX8MQ_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0x16 */
+	IMX8MQ_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_RESET_B__GPIO2_IO19 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+};
+
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+	{USDHC1_BASE_ADDR, 0, 8},
+	{USDHC2_BASE_ADDR, 0, 4},
+};
+
+int board_mmc_init(struct bd_info *bis)
+{
+	int i, ret;
+	/*
+	 * According to the board_mmc_init() the following map is done:
+	 * (U-Boot device node)    (Physical Port)
+	 * mmc0                    USDHC1
+	 * mmc1                    USDHC2
+	 */
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		log_debug("Initializing FSL USDHC port %d\n", i);
+		switch (i) {
+		case 0:
+			init_clk_usdhc(0);
+			usdhc_cfg[0].sdhc_clk = mxc_get_clock(USDHC1_CLK_ROOT);
+			imx_iomux_v3_setup_multiple_pads(usdhc1_pads,
+							 ARRAY_SIZE(usdhc1_pads));
+			gpio_request(USDHC1_PWR_GPIO, "usdhc1_reset");
+			gpio_direction_output(USDHC1_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC1_PWR_GPIO, 1);
+			break;
+		case 1:
+			init_clk_usdhc(1);
+			usdhc_cfg[1].sdhc_clk = mxc_get_clock(USDHC2_CLK_ROOT);
+			imx_iomux_v3_setup_multiple_pads(usdhc2_pads,
+							 ARRAY_SIZE(usdhc2_pads));
+			gpio_request(USDHC2_PWR_GPIO, "usdhc2_reset");
+			gpio_direction_output(USDHC2_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC2_PWR_GPIO, 1);
+			break;
+		default:
+			log_err("Warning: USDHC controller(%d) not supported\n", i + 1);
+			return -EINVAL;
+		}
+
+		ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+#define LDO_VOLT_EN                     BIT(6)
+
+/*
+ * Disable the charger - it will be re-enabled in u-boot
+ */
+void disable_charger_bq25895(void)
+{
+	u8 val;
+	int timeout = 1000; // ms
+
+	/* Set the i2c bus */
+	i2c_set_bus_num(3);
+
+	/* disable ship mode if BATFET_DLY is set */
+	val = i2c_reg_read(0x6a, 0x09);
+	log_debug("REG09 0x%x\n", val);
+	if (val & 0x28) {
+		val = val & ~0x28;
+		i2c_reg_write(0x6a, 0x09, val);
+	}
+
+	/* disable and trigger DPDM, ICO, HVDCP and MaxCharge */
+	val = i2c_reg_read(0x6a, 0x02);
+	log_debug("REG02 0x%x\n", val);
+	val &= 0xe0;
+	i2c_reg_write(0x6a, 0x02, val);
+
+	/* disable charger and enable BAT_LOADEN */
+	val = i2c_reg_read(0x6a, 0x03);
+	log_debug("REG03 0x%x\n", val);
+	val = (val | 0x80) & ~0x10;
+	i2c_reg_write(0x6a, 0x03, val);
+
+	mdelay(10);
+
+	/* force ADC conversions */
+	val = i2c_reg_read(0x6a, 0x02);
+	log_debug("REG02 0x%x\n", val);
+	val = (val | 0x80) & ~0x40;
+	i2c_reg_write(0x6a, 0x02, val);
+
+	do {
+		mdelay(10);
+		timeout -= 10;
+	} while ((i2c_reg_read(0x6a, 0x02) & 0x80) && (timeout > 0));
+
+	/* enable STAT pin */
+	val = i2c_reg_read(0x6a, 0x07);
+	log_debug("REG07 0x%x\n", val);
+	val = val & ~0x40;
+	i2c_reg_write(0x6a, 0x07, val);
+
+	/* check VBUS */
+	val = i2c_reg_read(0x6a, 0x11);
+	log_debug("VBUS good %d\n", (val >> 7) & 1);
+	log_debug("VBUS mV %d\n", (val & 0x7f) * 100 + 2600);
+
+	/* check VBAT */
+	val = i2c_reg_read(0x6a, 0x0e);
+	log_debug("VBAT mV %d\n", (val & 0x7f) * 20 + 2304);
+
+	/* limit the VINDPM to 3.9V  */
+	i2c_reg_write(0x6a, 0x0d, 0x8d);
+
+	/* set the max voltage to 4.192V */
+	val = i2c_reg_read(0x6a, 0x6);
+	val = (val & ~0xFC) | 0x16 << 2;
+	i2c_reg_write(0x6a, 0x6, val);
+
+	/* set the SYS_MIN to 3.7V */
+	val = i2c_reg_read(0x6a, 0x3);
+	val = val | 0xE;
+	i2c_reg_write(0x6a, 0x3, val);
+
+	/* disable BAT_LOADEN */
+	val = i2c_reg_read(0x6a, 0x03);
+	log_debug("REG03 0x%x\n", val);
+	val = val & ~0x80;
+	i2c_reg_write(0x6a, 0x03, val);
+}
+
+#define I2C_PMIC	0
+
+int power_bd71837_init(unsigned char bus)
+{
+	static const char name[] = BD718XX_REGULATOR_DRIVER;
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		log_err("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	p->name = name;
+	p->interface = I2C_PMIC;
+	p->number_of_regs = BD718XX_MAX_REGISTER;
+	p->hw.i2c.addr = CONFIG_POWER_BD71837_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	return 0;
+}
+
+int power_init_board(void)
+{
+	struct pmic *p;
+	int ldo[] = {BD718XX_LDO5_VOLT, BD718XX_LDO6_VOLT,
+		     BD71837_LDO7_VOLT};
+	u32 val;
+	int i, rv;
+
+	/* Set the i2c bus */
+	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+
+	/*
+	 * Init PMIC
+	 */
+	rv = power_bd71837_init(CONFIG_POWER_BD71837_I2C_BUS);
+	if (rv) {
+		log_err("%s: power_bd71837_init(%d) error %d\n", __func__,
+			CONFIG_POWER_BD71837_I2C_BUS, rv);
+		goto out;
+	}
+
+	p = pmic_get(BD718XX_REGULATOR_DRIVER);
+	if (!p) {
+		log_err("%s: pmic_get(%s) failed\n", __func__, BD718XX_REGULATOR_DRIVER);
+		rv = -ENODEV;
+		goto out;
+	}
+
+	rv = pmic_probe(p);
+	if (rv) {
+		log_err("%s: pmic_probe() error %d\n", __func__, rv);
+		goto out;
+	}
+
+	/*
+	 * Unlock all regs
+	 */
+	pmic_reg_write(p, BD718XX_REGLOCK, 0);
+
+	/* find the reset cause */
+	pmic_reg_read(p, 0x29, &val);
+	log_debug("%s: reset cause %d\n", __func__, val);
+
+	/*
+	 * Reconfigure default voltages and disable:
+	 * - BUCK3: VDD_GPU_0V9 (1.00 -> 0.90)
+	 * - BUCK4: VDD_VPU_0V9 (1.00 -> 0.90)
+	 */
+	pmic_reg_write(p, BD71837_BUCK3_VOLT_RUN, 0x14);
+	pmic_reg_write(p, BD71837_BUCK4_VOLT_RUN, 0x14);
+
+	/*
+	 * Enable PHYs voltages: LDO5-7
+	 */
+	for (i = 0; i < ARRAY_SIZE(ldo); i++) {
+		rv = pmic_reg_read(p, ldo[i], &val);
+		if (rv) {
+			log_err("%s: pmic_read(%x) error %d\n", __func__,
+				ldo[i], rv);
+			continue;
+		}
+
+		pmic_reg_write(p, ldo[i], val | LDO_VOLT_EN);
+	}
+
+	udelay(500);
+
+	rv = 0;
+out:
+	return rv;
+}
+
+int usb_gadget_handle_interrupts(void)
+{
+	dwc3_uboot_handle_interrupt(0);
+	return 0;
+}
+
+static void dwc3_nxp_usb_phy_init(struct dwc3_device *dwc3)
+{
+	u32 RegData;
+
+	RegData = readl(dwc3->base + USB_PHY_CTRL1);
+	RegData &= ~(USB_PHY_CTRL1_VDATSRCENB0 | USB_PHY_CTRL1_VDATDETENB0 |
+			USB_PHY_CTRL1_COMMONONN);
+	RegData |= USB_PHY_CTRL1_RESET | USB_PHY_CTRL1_ATERESET;
+	writel(RegData, dwc3->base + USB_PHY_CTRL1);
+
+	RegData = readl(dwc3->base + USB_PHY_CTRL0);
+	RegData |= USB_PHY_CTRL0_REF_SSP_EN;
+	RegData &= ~USB_PHY_CTRL0_SSC_RANGE_MASK;
+	RegData |= USB_PHY_CTRL0_SSC_RANGE_4003PPM;
+	writel(RegData, dwc3->base + USB_PHY_CTRL0);
+
+	RegData = readl(dwc3->base + USB_PHY_CTRL2);
+	RegData |= USB_PHY_CTRL2_TXENABLEN0;
+	writel(RegData, dwc3->base + USB_PHY_CTRL2);
+
+	RegData = readl(dwc3->base + USB_PHY_CTRL1);
+	RegData &= ~(USB_PHY_CTRL1_RESET | USB_PHY_CTRL1_ATERESET);
+	writel(RegData, dwc3->base + USB_PHY_CTRL1);
+
+	/* Disable rx term override */
+	RegData = readl(dwc3->base + USB_PHY_CTRL6);
+	RegData &= ~USB_PHY_CTRL6_RXTERM_OVERRIDE_SEL;
+	writel(RegData, dwc3->base + USB_PHY_CTRL6);
+}
+
+static struct dwc3_device dwc3_device0_data = {
+	.maximum_speed = USB_SPEED_HIGH,
+	.base = USB1_BASE_ADDR,
+	.dr_mode = USB_DR_MODE_PERIPHERAL,
+	.index = 0,
+};
+
+static struct dwc3_device dwc3_device1_data = {
+	.maximum_speed = USB_SPEED_HIGH,
+	.base = USB2_BASE_ADDR,
+	.dr_mode = USB_DR_MODE_HOST,
+	.index = 1,
+};
+
+int board_usb_init(int index, enum usb_init_type init)
+{
+	int ret = 0;
+
+	printf("%s : index %d type %d\n", __func__, index, init);
+
+	if (index == 0 && init == USB_INIT_DEVICE) {
+		dwc3_nxp_usb_phy_init(&dwc3_device0_data);
+		ret = dwc3_uboot_init(&dwc3_device0_data);
+	}
+	if (index == 1 && init == USB_INIT_HOST) {
+		dwc3_nxp_usb_phy_init(&dwc3_device1_data);
+		ret = dwc3_uboot_init(&dwc3_device1_data);
+	}
+
+	return ret;
+}
+
+int board_usb_cleanup(int index, enum usb_init_type init)
+{
+	u32 RegData;
+	struct dwc3_device *dwc3;
+
+	printf("%s : %d\n", __func__, index);
+
+	if (index == 0 && init == USB_INIT_DEVICE)
+		dwc3 = &dwc3_device0_data;
+	if (index == 1 && init == USB_INIT_HOST)
+		dwc3 = &dwc3_device1_data;
+
+	dwc3_uboot_exit(index);
+
+	/* reset the phy */
+	RegData = readl(dwc3->base + USB_PHY_CTRL1);
+	RegData &= ~(USB_PHY_CTRL1_VDATSRCENB0 | USB_PHY_CTRL1_VDATDETENB0 |
+			USB_PHY_CTRL1_COMMONONN);
+	RegData |= USB_PHY_CTRL1_RESET | USB_PHY_CTRL1_ATERESET;
+	writel(RegData, dwc3->base + USB_PHY_CTRL1);
+
+	/* enable rx term override */
+	RegData = readl(dwc3->base + USB_PHY_CTRL6);
+	RegData |= USB_PHY_CTRL6_RXTERM_OVERRIDE_SEL;
+	writel(RegData, dwc3->base + USB_PHY_CTRL6);
+
+	return 0;
+}
+
+void spl_board_init(void)
+{
+	if (is_usb_boot())
+		puts("USB Boot\n");
+	else
+		puts("Normal Boot\n");
+}
+
+void board_boot_order(u32 *spl_boot_list)
+{
+	if (is_usb_boot())
+		spl_boot_list[0] = BOOT_DEVICE_BOARD;
+	else
+		spl_boot_list[0] = BOOT_DEVICE_MMC1;
+}
+
+#define WDOG_PAD_CTRL  (PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE)
+
+static const iomux_v3_cfg_t wdog_pads[] = {
+	IMX8MQ_PAD_GPIO1_IO02__WDOG1_WDOG_B | MUX_PAD_CTRL(WDOG_PAD_CTRL),
+};
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;
+
+	arch_cpu_init();
+
+	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
+	set_wdog_reset(wdog);
+
+	init_uart_clk(CONSOLE_UART_CLK);
+	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
+
+#ifdef CONSOLE_ON_UART4
+	gpio_request(WIFI_EN, "WIFI_EN");
+	gpio_direction_output(WIFI_EN, 1);
+#endif
+
+	board_early_init_f();
+
+	timer_init();
+
+	preloader_console_init();
+
+	ret = spl_init();
+	if (ret) {
+		log_err("spl_init() failed: %d\n", ret);
+		hang();
+	}
+
+	enable_tzc380();
+
+	printf("Initializing pinmux\n");
+	init_pinmux();
+	gpio_direction_output(LED_G, 1);
+	gpio_direction_output(MOTO, 1);
+	mdelay(50);
+	gpio_direction_output(MOTO, 0);
+
+	/* Enable and configure i2c buses not used below */
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2);
+	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info3);
+	setup_i2c(3, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info4);
+
+	power_init_board();
+
+	disable_charger_bq25895();
+
+	/* initialize this for M4 even if u-boot doesn't have SF_CMD */
+	printf("Initializing ECSPI\n");
+	board_ecspi_init();
+
+	/* DDR initialization */
+	printf("Initializing DRAM\n");
+	spl_dram_init();
+}

configs/librem5_defconfig

@@ -0,0 +1,152 @@
+CONFIG_ARM=y
+CONFIG_ARCH_IMX8M=y
+CONFIG_SYS_TEXT_BASE=0x40200000
+CONFIG_SPL_GPIO=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_ENV_SIZE=0x2000
+CONFIG_ENV_OFFSET=0x3FE000
+CONFIG_SYS_I2C_MXC_I2C1=y
+CONFIG_SYS_I2C_MXC_I2C2=y
+CONFIG_SYS_I2C_MXC_I2C3=y
+CONFIG_SYS_I2C_MXC_I2C4=y
+CONFIG_DM_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="imx8mq-librem5-r4"
+CONFIG_SPL_TEXT_BASE=0x7E1000
+CONFIG_TARGET_LIBREM5=y
+CONFIG_SPL_MMC=y
+CONFIG_SPL_SERIAL=y
+CONFIG_SPL_DRIVERS_MISC=y
+CONFIG_SPL=y
+CONFIG_IMX_BOOTAUX=y
+CONFIG_SYS_LOAD_ADDR=0x40480000
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_REMAKE_ELF=y
+CONFIG_FIT=y
+CONFIG_FIT_EXTERNAL_OFFSET=0x3000
+CONFIG_SPL_LOAD_FIT=y
+# CONFIG_USE_SPL_FIT_GENERATOR is not set
+CONFIG_OF_SYSTEM_SETUP=y
+CONFIG_BOOTDELAY=0
+CONFIG_SYS_CONSOLE_IS_IN_ENV=y
+# CONFIG_SYS_DEVICE_NULLDEV is not set
+CONFIG_ARCH_MISC_INIT=y
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_BOARD_LATE_INIT=y
+CONFIG_SPL_MAX_SIZE=0x25000
+CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
+CONFIG_SPL_BSS_START_ADDR=0x180000
+CONFIG_SPL_BSS_MAX_SIZE=0x2000
+CONFIG_SPL_BOARD_INIT=y
+# CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
+CONFIG_SPL_STACK=0x187ff0
+CONFIG_SYS_SPL_MALLOC=y
+CONFIG_HAS_CUSTOM_SPL_MALLOC_START=y
+CONFIG_CUSTOM_SYS_SPL_MALLOC_ADDR=0x42200000
+CONFIG_SYS_SPL_MALLOC_SIZE=0x80000
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x300
+CONFIG_SPL_I2C=y
+CONFIG_SPL_POWER=y
+CONFIG_SPL_USB_GADGET=y
+CONFIG_SPL_USB_SDP_SUPPORT=y
+CONFIG_SPL_WATCHDOG=y
+CONFIG_SYS_PROMPT="u-boot=> "
+CONFIG_SYS_MAXARGS=64
+CONFIG_SYS_PBSIZE=1050
+CONFIG_CMD_MEMTEST=y
+CONFIG_SYS_ALT_MEMTEST=y
+CONFIG_CMD_CLK=y
+CONFIG_CMD_FUSE=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_USB_SDP=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_OF_CONTROL=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_SPL_DM=y
+CONFIG_DEVRES=y
+# CONFIG_SPL_BLK is not set
+CONFIG_BUTTON=y
+CONFIG_BUTTON_GPIO=y
+CONFIG_SAVED_DRAM_TIMING_BASE=0x40000000
+CONFIG_DMA=y
+CONFIG_DMA_CHANNELS=y
+CONFIG_USB_FUNCTION_FASTBOOT=y
+CONFIG_FASTBOOT_BUF_ADDR=0x43000000
+CONFIG_FASTBOOT_BUF_SIZE=0x40000000
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_UUU_SUPPORT=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=0
+CONFIG_FASTBOOT_MMC_BOOT_SUPPORT=y
+CONFIG_FASTBOOT_MMC_USER_SUPPORT=y
+CONFIG_FASTBOOT_CMD_OEM_PARTCONF=y
+CONFIG_FASTBOOT_CMD_OEM_BOOTBUS=y
+# CONFIG_SPL_DM_GPIO is not set
+CONFIG_GPIO_HOG=y
+CONFIG_DM_GPIO_LOOKUP_LABEL=y
+CONFIG_MXC_GPIO=y
+CONFIG_DM_I2C=y
+# CONFIG_SPL_DM_I2C is not set
+CONFIG_SPL_SYS_I2C_LEGACY=y
+CONFIG_SYS_I2C_EARLY_INIT=y
+CONFIG_SYS_MXC_I2C1_SPEED=50000
+CONFIG_SYS_MXC_I2C2_SPEED=50000
+CONFIG_SYS_MXC_I2C3_SPEED=50000
+CONFIG_SYS_MXC_I2C4_SPEED=50000
+CONFIG_SYS_I2C_SPEED=50000
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_MISC=y
+CONFIG_PWRSEQ=y
+CONFIG_MMC_BROKEN_CD=y
+# CONFIG_SPL_DM_MMC is not set
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_MMC_IO_VOLTAGE=y
+CONFIG_MMC_UHS_SUPPORT=y
+CONFIG_MMC_HS400_ES_SUPPORT=y
+CONFIG_MMC_HS400_SUPPORT=y
+CONFIG_FSL_USDHC=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_DM_ETH=y
+CONFIG_PHY=y
+CONFIG_PHY_IMX8MQ_USB=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX8M=y
+CONFIG_POWER_LEGACY=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_IMX8M_POWER_DOMAIN=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_POWER_I2C=y
+CONFIG_DM_RESET=y
+CONFIG_MXC_UART=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_MXC_SPI=y
+CONFIG_DM_THERMAL=y
+CONFIG_IMX_TMU=y
+CONFIG_USB=y
+CONFIG_DM_USB_GADGET=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_DWC3=y
+CONFIG_USB_DWC3_GENERIC=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_MANUFACTURER="Purism"
+CONFIG_USB_GADGET_VENDOR_NUM=0x0525
+CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
+CONFIG_SDP_LOADADDR=0x40400000
+CONFIG_USB_FUNCTION_ACM=y

doc/board/index.rst

@@ -28,6 +28,7 @@ Board-specific doc
    nokia/index
    nxp/index
    openpiton/index
+   purism/index
    qualcomm/index
    rockchip/index
    samsung/index

doc/board/purism/index.rst

@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Purism SPC
+==========
+
+.. toctree::
+   :maxdepth: 2
+
+   librem5

doc/board/purism/librem5.rst

@@ -0,0 +1,60 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Librem5
+==========
+
+U-Boot for the Purism Librem5 phone
+
+Quick Start
+-----------
+
+- Build the ARM Trusted firmware binary
+- Get ddr and hdmi firmware
+- Build U-Boot
+
+Get and Build the ARM Trusted firmware
+--------------------------------------
+
+Note: srctree is U-Boot source directory
+Get ATF from: https://source.puri.sm/Librem5/arm-trusted-firmware
+branch: librem5
+
+.. code-block:: bash
+
+   $ make PLAT=imx8mq CROSS_COMPILE=aarch64-linux-gnu- bl31
+   $ cp build/imx8mq/release/bl31.bin $(builddir)
+
+Get the ddr and display port firmware
+-------------------------------------
+
+.. code-block:: bash
+
+   $ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.15.bin
+   $ chmod +x firmware-imx-8.15.bin
+   $ ./firmware-imx-8.15.bin
+   $ cp firmware-imx-8.15/firmware/hdmi/cadence/signed_dp_imx8m.bin $(builddir)
+   $ cp firmware-imx-8.15/firmware/ddr/synopsys/lpddr4*.bin $(builddir)
+
+Build U-Boot
+------------
+
+.. code-block:: bash
+
+   $ export CROSS_COMPILE=aarch64-linux-gnu-
+   $ make librem5_defconfig
+   $ make ARCH=arm
+
+Burn the flash.bin
+------------------
+
+Use uuu to burn flash.bin. Power on the phone while holding vol+ to get it
+into uuu mode.
+
+.. code-block:: bash
+
+   $ git clone https://source.puri.sm/Librem5/librem5-devkit-tools.git
+   $ cd librem5-devkit-tools
+   $ cp $(builddir)/flash.bin files/u-boot-librem5.imx
+   $ uuu uuu_scripts/u-boot_flash_librem5.lst
+
+Reboot the phone.

include/configs/librem5.h

@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2017 NXP
+ * Copyright 2018 Emcraft Systems
+ * Copyright 2022 Purism
+ *
+ */
+
+#ifndef __LIBREM5_H
+#define __LIBREM5_H
+
+/* #define DEBUG */
+
+#include <version.h>
+#include <linux/sizes.h>
+#include <asm/arch/imx-regs.h>
+
+#define CONFIG_SYS_MONITOR_LEN		(512 * 1024)
+
+#ifdef CONFIG_SPL_BUILD
+
+#define CONFIG_SPL_ABORT_ON_RAW_IMAGE /* For RAW image gives a error info not panic */
+
+#define CONFIG_POWER_BD71837
+#define CONFIG_POWER_BD71837_I2C_BUS	0
+#define CONFIG_POWER_BD71837_I2C_ADDR	0x4B
+
+#endif /* CONFIG_SPL_BUILD*/
+
+#define CONFIG_SYS_FSL_USDHC_NUM	2
+
+#define CONFIG_USBD_HS
+
+#define CONSOLE_ON_UART1
+
+#ifdef CONSOLE_ON_UART1
+#define CONFIG_MXC_UART_BASE		UART1_BASE_ADDR
+#define CONSOLE_UART_CLK		0
+#define CONSOLE		"ttymxc0"
+#elif defined(CONSOLE_ON_UART2)
+#define CONFIG_MXC_UART_BASE		UART2_BASE_ADDR
+#define CONSOLE_UART_CLK		1
+#define CONSOLE		"ttymxc1"
+#elif defined(CONSOLE_ON_UART3)
+#define CONFIG_MXC_UART_BASE		UART3_BASE_ADDR
+#define CONSOLE_UART_CLK		2
+#define CONSOLE		"ttymxc2"
+#elif defined(CONSOLE_ON_UART4)
+#define CONFIG_MXC_UART_BASE		UART4_BASE_ADDR
+#define CONSOLE_UART_CLK		3
+#define CONSOLE		"ttymxc3"
+#else
+#define CONFIG_MXC_UART_BASE		UART1_BASE_ADDR
+#define CONSOLE_UART_CLK		0
+#define CONSOLE		"ttymxc0"
+#endif
+
+#ifndef CONFIG_SPL_BUILD
+#define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0) \
+	func(USB, usb, 0) \
+	func(DHCP, dhcp, na)
+#include <config_distro_bootcmd.h>
+#else
+#define BOOTENV
+#endif
+
+/* Initial environment variables */
+#define CONFIG_EXTRA_ENV_SETTINGS		\
+	"scriptaddr=0x80000000\0" \
+	"pxefile_addr_r=0x80100000\0" \
+	"kernel_addr_r=0x80800000\0" \
+	"fdt_addr_r=0x84800000\0" \
+	"ramdisk_addr_r=0x85000000\0" \
+	"console=" CONSOLE ",115200\0" \
+	"bootargs=u_boot_version=" PLAIN_VERSION "\0" \
+	"stdin=usbacm,serial\0" \
+	"stdout=usbacm,serial\0" \
+	"stderr=usbacm,serial\0" \
+	BOOTENV
+
+/* Link Definitions */
+
+#define CONFIG_SYS_INIT_RAM_ADDR        0x40000000
+#define CONFIG_SYS_INIT_RAM_SIZE        0x80000
+
+#define CONFIG_SYS_SDRAM_BASE           0x40000000
+#define PHYS_SDRAM                      0x40000000
+#define PHYS_SDRAM_SIZE			0xc0000000 /* 3GB LPDDR4 one Rank */
+
+/* Monitor Command Prompt */
+
+#define CONFIG_SYS_FSL_ESDHC_ADDR       0
+
+#endif