board: toradex: add Toradex SMARC iMX8MP
Add support for the Toradex SMARC iMX8MP.
Link: https://www.toradex.com/computer-on-modules/smarc-arm-family/nxp-imx-8m-plus
Link: https://www.toradex.com/products/carrier-board/smarc-development-board-kit
Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
diff --git a/board/toradex/smarc-imx8mp/spl.c b/board/toradex/smarc-imx8mp/spl.c
new file mode 100644
index 0000000..32233c0
--- /dev/null
+++ b/board/toradex/smarc-imx8mp/spl.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Copyright (C) 2024 Toradex */
+
+#include <hang.h>
+#include <init.h>
+#include <log.h>
+#include <spl.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/global_data.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <dm/device.h>
+#include <power/pmic.h>
+#include <power/pca9450.h>
+
+#include "lpddr4_timing.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)
+{
+ /*
+ * Try configuring for dual rank memory falling back to single rank
+ */
+ if (!ddr_init(&dram_timing)) {
+ puts("DDR configured as dual rank\n");
+ return;
+ }
+
+ lpddr4_single_rank_training_patch();
+ if (!ddr_init(&dram_timing)) {
+ puts("DDR configured as single rank\n");
+ return;
+ }
+ puts("DDR configuration failed\n");
+}
+
+void spl_board_init(void)
+{
+ arch_misc_init();
+
+ /*
+ * Set GIC clock to 500Mhz for OD VDD_SOC. Kernel driver does
+ * not allow to change it. Should set the clock after PMIC
+ * setting done. Default is 400Mhz (system_pll1_800m with div = 2)
+ * set by ROM for ND VDD_SOC
+ */
+ clock_enable(CCGR_GIC, 0);
+ clock_set_target_val(GIC_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(5));
+ clock_enable(CCGR_GIC, 1);
+
+ puts("Normal Boot\n");
+}
+
+int power_init_board(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ ret = pmic_get("pmic@25", &dev);
+ if (ret == -ENODEV) {
+ puts("No pmic@25\n");
+ return 0;
+ }
+ if (ret < 0)
+ return ret;
+
+ /* BUCKxOUT_DVS0/1 control BUCK123 output */
+ pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
+
+ /*
+ * Increase VDD_SOC to typical value 0.95V before first
+ * DRAM access, set DVS1 to 0.85V for suspend.
+ * Enable DVS control through PMIC_STBY_REQ and
+ * set B1_ENMODE=1 (ON by PMIC_ON_REQ=H)
+ */
+ if (IS_ENABLED(CONFIG_IMX8M_VDD_SOC_850MV))
+ /* set DVS0 to 0.85v for special case */
+ pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x14);
+ else
+ pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x1c);
+
+ pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x14);
+ pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);
+
+ /*
+ * Kernel uses OD/OD freq for SOC.
+ * To avoid timing risk from SOC to ARM,increase VDD_ARM to OD
+ * voltage 0.95V.
+ */
+ pmic_reg_write(dev, PCA9450_BUCK2OUT_DVS0, 0x1c);
+
+ /* set LDO4 and CONFIG2 to enable the I2C level translator */
+ pmic_reg_write(dev, PCA9450_LDO4CTRL, 0x59);
+ pmic_reg_write(dev, PCA9450_CONFIG2, 0x1);
+
+ return 0;
+}
+
+/* Do not use BSS area in this phase */
+void board_init_f(ulong dummy)
+{
+ int ret;
+
+ arch_cpu_init();
+
+ init_uart_clk(3);
+
+ ret = spl_early_init();
+ if (ret) {
+ debug("spl_init() failed: %d\n", ret);
+ hang();
+ }
+
+ preloader_console_init();
+
+ enable_tzc380();
+
+ /* PMIC initialization */
+ power_init_board();
+
+ /* DDR initialization */
+ spl_dram_init();
+}