Jonas SchwöbelandSvyatoslav Ryhel
e69e2dc7f5
Surface 2 is a Surface-series Windows RT hybrid tablet computer created by Microsoft. Surface 2 uses a 1.7 GHz quad-core Nvidia Tegra 4 chipset with 2 GB of RAM, features 10.6 inch FullHD ClearType HD screen with 16:9 aspect ratio and 32/64 GB of internal memory that can be supplemented with a microSDXC card giving up to 64 GB of additional storage. Signed-off-by: Jonas Schwöbel <jonasschwoebel@yahoo.de> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2025
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* Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <stdio.h>
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#include <env.h>
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#include <spl_gpio.h>
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#include <asm/gpio.h>
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#include <asm/arch/pinmux.h>
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#include <linux/string.h>
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static int id_gpio_get_value(u32 pingrp, u32 pin)
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{
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/* Configure pinmux */
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pinmux_set_func(pingrp, PMUX_FUNC_KBC);
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pinmux_set_pullupdown(pingrp, PMUX_PULL_DOWN);
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pinmux_tristate_enable(pingrp);
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pinmux_set_io(pingrp, PMUX_PIN_INPUT);
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/*
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* Since this function may be called
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* during DM reload we should use SPL
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* GPIO functions which do not depend
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* on DM.
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*/
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spl_gpio_input(NULL, pin);
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return spl_gpio_get_value(NULL, pin);
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}
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static int get_board_id(void)
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{
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u32 pcb_id0, pcb_id1, pcb_id2, pcb_id3, pcb_id4, board_id;
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pcb_id0 = id_gpio_get_value(PMUX_PINGRP_KB_COL0_PQ0, TEGRA_GPIO(Q, 0));
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pcb_id1 = id_gpio_get_value(PMUX_PINGRP_KB_COL1_PQ1, TEGRA_GPIO(Q, 1));
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pcb_id2 = id_gpio_get_value(PMUX_PINGRP_KB_COL2_PQ2, TEGRA_GPIO(Q, 2));
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pcb_id3 = id_gpio_get_value(PMUX_PINGRP_KB_COL3_PQ3, TEGRA_GPIO(Q, 3));
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pcb_id4 = id_gpio_get_value(PMUX_PINGRP_KB_COL4_PQ4, TEGRA_GPIO(Q, 4));
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/* Construct board ID */
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board_id = pcb_id4 << 4 | pcb_id3 << 3 | pcb_id2 << 2 | pcb_id1 << 1 | pcb_id0;
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log_debug("[SURFACE-2]: Board ID %02x\n", board_id);
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return board_id & 0x1f;
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}
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int board_fit_config_name_match(const char *name)
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{
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char dt_name[64] = { 0 };
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snprintf(dt_name, sizeof(dt_name), "tegra114-microsoft-surface-2-%02x.dtb",
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get_board_id());
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if (!strcmp(name, dt_name))
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return 0;
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return -1;
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}
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void nvidia_board_late_init(void)
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{
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char dt_path[64] = { 0 };
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snprintf(dt_path, sizeof(dt_path), "tegra114-microsoft-surface-2-%02x.dtb",
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get_board_id());
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env_set("fdtfile", dt_path);
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}
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