Add imx93-var-som support
Add support for the Variscite VAR-SOM-IMX93 evaluation kit. The SoM
consists of an NXP iMX93 dual A55 CPU. The SoM is mounted on a Variscite
Symphony SBC.
Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com>
diff --git a/board/variscite/imx93_var_som/spl.c b/board/variscite/imx93_var_som/spl.c
new file mode 100644
index 0000000..502e599
--- /dev/null
+++ b/board/variscite/imx93_var_som/spl.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2022 NXP
+ * Copyright 2023 Variscite Ltd.
+ */
+
+#include <command.h>
+#include <cpu_func.h>
+#include <image.h>
+#include <init.h>
+#include <log.h>
+#include <spl.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/arch/imx93_pins.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/arch-mx7ulp/gpio.h>
+#include <asm/sections.h>
+#include <asm/mach-imx/syscounter.h>
+#include <dm/uclass.h>
+#include <dm/device.h>
+#include <dm/uclass-internal.h>
+#include <dm/device-internal.h>
+#include <linux/delay.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/ccm_regs.h>
+#include <asm/arch/ddr.h>
+#include <power/pmic.h>
+#include <power/pca9450.h>
+#include <asm/arch/trdc.h>
+
+#include "../common/imx9_eeprom.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct var_eeprom eeprom = {0};
+
+int spl_board_boot_device(enum boot_device boot_dev_spl)
+{
+ return BOOT_DEVICE_BOOTROM;
+}
+
+void spl_board_init(void)
+{
+ struct var_eeprom *ep = VAR_EEPROM_DATA;
+
+ puts("Normal Boot\n");
+
+ /* Copy EEPROM contents to DRAM */
+ memcpy(ep, &eeprom, sizeof(*ep));
+}
+
+void spl_dram_init(void)
+{
+ /* EEPROM initialization */
+ var_eeprom_read_header(&eeprom);
+
+ ddr_init(&dram_timing);
+}
+
+int power_init_board(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ if (IS_ENABLED(CONFIG_SPL_DM_PMIC_PCA9450)) {
+ ret = pmic_get("pmic@25", &dev);
+ if (ret == -ENODEV) {
+ puts("No pca9450@25\n");
+ return 0;
+ }
+ if (ret != 0)
+ return ret;
+
+ /* BUCKxOUT_DVS0/1 control BUCK123 output */
+ pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
+
+ /* enable DVS control through PMIC_STBY_REQ */
+ pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);
+
+ pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x18);
+ pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, 0x18);
+
+ /* set standby voltage to 0.65V */
+ pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x4);
+
+ /* I2C_LT_EN*/
+ pmic_reg_write(dev, 0xa, 0x3);
+
+ /* set WDOG_B_CFG to cold reset */
+ pmic_reg_write(dev, PCA9450_RESET_CTRL, 0xA1);
+ }
+
+ return 0;
+}
+
+void board_init_f(ulong dummy)
+{
+ int ret;
+
+ /* Clear the BSS. */
+ memset(__bss_start, 0, __bss_end - __bss_start);
+
+ timer_init();
+
+ arch_cpu_init();
+
+ board_early_init_f();
+
+ spl_early_init();
+
+ preloader_console_init();
+
+ ret = arch_cpu_init();
+ if (ret) {
+ printf("Fail to init Sentinel API\n");
+ } else {
+ printf("SOC: 0x%x\n", gd->arch.soc_rev);
+ printf("LC: 0x%x\n", gd->arch.lifecycle);
+ }
+ power_init_board();
+
+ set_arm_core_max_clk();
+
+ /* Init power of mix */
+ soc_power_init();
+
+ /* Setup TRDC for DDR access */
+ trdc_init();
+
+ /* DDR initialization */
+ spl_dram_init();
+
+ /* Put M33 into CPUWAIT for following kick */
+ ret = m33_prepare();
+ if (!ret)
+ printf("M33 prepare ok\n");
+
+ board_init_r(NULL, 0);
+}