[PATCH V2 09/17] arm: j721e: Add support for selecting DT based on EEPROM

Sinthu Raja
2021-11-02T14:23:42Z

Enable support for selecting DTB from FIT within SPL based on the
board name read from EEPROM. This will help to use single defconfig
for both EVM and SK.

Also print FDT model name and board name read from EEPROM on SPL debug
console. This is useful to verify that right dtb is loaded in each boot
stage.

Signed-off-by: Sinthu Raja <sinthu.raja@ti.com>
---

No changes in V2.

arch/arm/mach-k3/j721e_init.c | 62 +++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)

diff --git a/arch/arm/mach-k3/j721e_init.c b/arch/arm/mach-k3/j721e_init.c
index 78d80be175..53ea4692f6 100644
--- a/arch/arm/mach-k3/j721e_init.c
+++ b/arch/arm/mach-k3/j721e_init.c
@@ -21,6 +21,7 @@
#include <dm/pinctrl.h>
#include <mmc.h>
#include <remoteproc.h>
+#include <dm/root.h>

#ifdef CONFIG_SPL_BUILD
#ifdef CONFIG_K3_LOAD_SYSFW
@@ -135,6 +136,59 @@ static void store_boot_info_from_rom(void)
sizeof(struct rom_extended_boot_data));
}

+#ifdef CONFIG_SPL_OF_LIST
+void do_dt_magic(void)
+{
+ int ret, rescan, mmc_dev = -1;
+ static struct mmc *mmc;
+
+ if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT))
+ do_board_detect();
+
+ /*
+ * Board detection has been done.
+ * Let us see if another dtb wouldn't be a better match
+ * for our board
+ */
+ if (IS_ENABLED(CONFIG_CPU_V7R)) {
+ ret = fdtdec_resetup(&rescan);
+ if (!ret && rescan) {
+ dm_uninit();
+ dm_init_and_scan(true);
+ }
+ }
+
+ /*
+ * Because of multi DTB configuration, the MMC device has
+ * to be re-initialized after reconfiguring FDT inorder to
+ * boot from MMC. Do this when boot mode is MMC and ROM has
+ * not loaded SYSFW.
+ */
+ switch (spl_boot_device()) {
+ case BOOT_DEVICE_MMC1:
+ mmc_dev = 0;
+ break;
+ case BOOT_DEVICE_MMC2:
+ case BOOT_DEVICE_MMC2_2:
+ mmc_dev = 1;
+ break;
+ }
+
+ if (mmc_dev > 0 && !is_rom_loaded_sysfw(&bootdata)) {
+ ret = mmc_init_device(mmc_dev);
+ if (!ret) {
+ mmc = find_mmc_device(mmc_dev);
+ if (mmc) {
+ ret = mmc_init(mmc);
+ if (ret) {
+ printf("mmc init failed with error: %d\n", ret);
+ }
+ }
+ }
+ }
+}
+#endif
+
void board_init_f(ulong dummy)
{
#if defined(CONFIG_K3_J721E_DDRSS) || defined(CONFIG_K3_LOAD_SYSFW)
@@ -180,6 +234,10 @@ void board_init_f(ulong dummy)
k3_sysfw_loader(is_rom_loaded_sysfw(&bootdata),
k3_mmc_stop_clock, k3_mmc_restart_clock);

+#ifdef CONFIG_SPL_OF_LIST
+ do_dt_magic();
+#endif
+
/*
* Force probe of clk_k3 driver here to ensure basic default clock
* configuration is always done.
@@ -210,6 +268,10 @@ void board_init_f(ulong dummy)
preloader_console_init();
#endif

+#if defined(CONFIG_DISPLAY_BOARDINFO)
+ show_board_info();
+#endif
+
/* Output System Firmware version info */
k3_sysfw_print_ver();

--
2.31.1