board: phytec: imx8mp: Add PHYTEC phyCORE-i.MX8MP support

Add initial support PHYTEC phyCORE-i.MX8MP SOM.

    Supported features:
     - 2GB LPDDR4 RAM
     - eMMC
     - external SD
     - debug UART2
     - watchdog

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Heiko Schocher <hs@denx.de>

board/phytec/phycore_imx8mp/Kconfig

@@ -0,0 +1,12 @@
+if TARGET_PHYCORE_IMX8MP
+
+config SYS_BOARD
+	default "phycore_imx8mp"
+
+config SYS_VENDOR
+	default "phytec"
+
+config SYS_CONFIG_NAME
+	default "phycore_imx8mp"
+
+endif

board/phytec/phycore_imx8mp/MAINTAINERS

@@ -0,0 +1,9 @@
+phyCORE-i.MX8M Plus
+M:      Teresa Remmet <t.remmet@phytec.de>
+W:      https://www.phytec.eu/product-eu/system-on-modules/phycore-imx-8m-plus/
+S:      Maintained
+F:      arch/arm/dts/imx8mp-phyboard-pollux-rdk.dts
+F:      arch/arm/dts/imx8mp-phyboard-pollux-rdk-u-boot.dtsi
+F:      board/phytec/phycore_imx8mp/
+F:      configs/phycore-imx8mp_defconfig
+F:      include/configs/phycore_imx8mp.h

board/phytec/phycore_imx8mp/Makefile

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright (C) 2020 PHYTEC Messtechnik GmbH
+# Author: Teresa Remmet <t.remmet@phytec.de>
+
+obj-y += phycore-imx8mp.o
+
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing.o
+endif

board/phytec/phycore_imx8mp/phycore-imx8mp.c

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 PHYTEC Messtechnik GmbH
+ * Author: Teresa Remmet <t.remmet@phytec.de>
+ */
+
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <env.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	return 0;
+}
+
+int board_mmc_get_env_dev(int devno)
+{
+	return devno;
+}
+
+int board_late_init(void)
+{
+	switch (get_boot_device()) {
+	case SD2_BOOT:
+		env_set_ulong("mmcdev", 1);
+		break;
+	case MMC3_BOOT:
+		env_set_ulong("mmcdev", 2);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}

board/phytec/phycore_imx8mp/spl.c

@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 PHYTEC Messtechnik GmbH
+ * Author: Teresa Remmet <t.remmet@phytec.de>
+ */
+
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx8mp_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <hang.h>
+#include <init.h>
+#include <log.h>
+#include <power/pmic.h>
+#include <power/pca9450.h>
+#include <spl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int spl_board_boot_device(enum boot_device boot_dev_spl)
+{
+	return BOOT_DEVICE_BOOTROM;
+}
+
+void spl_dram_init(void)
+{
+	ddr_init(&dram_timing);
+}
+
+#define I2C_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | PAD_CTL_PE)
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = MX8MP_PAD_I2C1_SCL__I2C1_SCL | PC,
+		.gpio_mode = MX8MP_PAD_I2C1_SCL__GPIO5_IO14 | PC,
+		.gp = IMX_GPIO_NR(5, 14),
+	},
+	.sda = {
+		.i2c_mode = MX8MP_PAD_I2C1_SDA__I2C1_SDA | PC,
+		.gpio_mode = MX8MP_PAD_I2C1_SDA__GPIO5_IO15 | PC,
+		.gp = IMX_GPIO_NR(5, 15),
+	},
+};
+
+int power_init_board(void)
+{
+	struct pmic *p;
+	int ret;
+
+	ret = power_pca9450_init(0);
+	if (ret)
+		printf("power init failed");
+	p = pmic_get("PCA9450");
+	pmic_probe(p);
+
+	/* BUCKxOUT_DVS0/1 control BUCK123 output */
+	pmic_reg_write(p, PCA9450_BUCK123_DVS, 0x29);
+
+	/* increase VDD_SOC to typical value 0.95V */
+	pmic_reg_write(p, PCA9450_BUCK2OUT_DVS0, 0x1C);
+
+	/* set WDOG_B_CFG to cold reset */
+	pmic_reg_write(p, PCA9450_RESET_CTRL, 0xA1);
+
+	return 0;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	return 0;
+}
+
+#define UART_PAD_CTRL   (PAD_CTL_DSE6 | PAD_CTL_FSEL1)
+#define WDOG_PAD_CTRL   (PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)
+
+static iomux_v3_cfg_t const uart_pads[] = {
+	MX8MP_PAD_UART2_RXD__UART2_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	MX8MP_PAD_UART2_TXD__UART2_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const wdog_pads[] = {
+	MX8MP_PAD_GPIO1_IO02__WDOG1_WDOG_B  | MUX_PAD_CTRL(WDOG_PAD_CTRL),
+};
+
+int board_early_init_f(void)
+{
+	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;
+
+	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
+
+	set_wdog_reset(wdog);
+
+	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
+
+	return 0;
+}
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+
+	arch_cpu_init();
+
+	init_uart_clk(1);
+
+	board_early_init_f();
+
+	ret = spl_early_init();
+	if (ret) {
+		debug("spl_early_init() failed: %d\n", ret);
+		hang();
+	}
+
+	preloader_console_init();
+
+	enable_tzc380();
+
+	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+
+	power_init_board();
+
+	/* DDR initialization */
+	spl_dram_init();
+}