1 files changed, 71 insertions, 0 deletions
diff --git a/board/microsoft/surface-2/board-info.c b/board/microsoft/surface-2/board-info.c
new file mode 100644
index 00000000000..95a4accdc90
--- /dev/null
+++ b/board/microsoft/surface-2/board-info.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  (C) Copyright 2025
+ *  Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <stdio.h>
+#include <env.h>
+#include <spl_gpio.h>
+
+#include <asm/gpio.h>
+#include <asm/arch/pinmux.h>
+#include <linux/string.h>
+
+static int id_gpio_get_value(u32 pingrp, u32 pin)
+{
+	/* Configure pinmux */
+	pinmux_set_func(pingrp, PMUX_FUNC_KBC);
+	pinmux_set_pullupdown(pingrp, PMUX_PULL_DOWN);
+	pinmux_tristate_enable(pingrp);
+	pinmux_set_io(pingrp, PMUX_PIN_INPUT);
+
+	/*
+	 * Since this function may be called
+	 * during DM reload we should use SPL
+	 * GPIO functions which do not depend
+	 * on DM.
+	 */
+	spl_gpio_input(NULL, pin);
+	return spl_gpio_get_value(NULL, pin);
+}
+
+static int get_board_id(void)
+{
+	u32 pcb_id0, pcb_id1, pcb_id2, pcb_id3, pcb_id4, board_id;
+
+	pcb_id0 = id_gpio_get_value(PMUX_PINGRP_KB_COL0_PQ0, TEGRA_GPIO(Q, 0));
+	pcb_id1 = id_gpio_get_value(PMUX_PINGRP_KB_COL1_PQ1, TEGRA_GPIO(Q, 1));
+	pcb_id2 = id_gpio_get_value(PMUX_PINGRP_KB_COL2_PQ2, TEGRA_GPIO(Q, 2));
+	pcb_id3 = id_gpio_get_value(PMUX_PINGRP_KB_COL3_PQ3, TEGRA_GPIO(Q, 3));
+	pcb_id4 = id_gpio_get_value(PMUX_PINGRP_KB_COL4_PQ4, TEGRA_GPIO(Q, 4));
+
+	/* Construct board ID */
+	board_id = pcb_id4 << 4 | pcb_id3 << 3 | pcb_id2 << 2 | pcb_id1 << 1 | pcb_id0;
+
+	log_debug("[SURFACE-2]: Board ID %02x\n", board_id);
+
+	return board_id & 0x1f;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	char dt_name[64] = { 0 };
+
+	snprintf(dt_name, sizeof(dt_name), "tegra114-microsoft-surface-2-%02x.dtb",
+		 get_board_id());
+
+	if (!strcmp(name, dt_name))
+		return 0;
+
+	return -1;
+}
+
+void nvidia_board_late_init(void)
+{
+	char dt_path[64] = { 0 };
+
+	snprintf(dt_path, sizeof(dt_path), "tegra114-microsoft-surface-2-%02x.dtb",
+		 get_board_id());
+	env_set("fdtfile", dt_path);
+}