board/tq: Add common mmc API

Reduce code duplication by adding a default implementation

Signed-off-by: Max Merchel <Max.Merchel@ew.tq-group.com>

board/tq/common/Kconfig

@@ -8,3 +8,6 @@
 config TQ_COMMON_BB
 	bool
 	default y
+
+config TQ_COMMON_SDMMC
+	bool

board/tq/common/Makefile

@@ -6,3 +6,4 @@
 #
 
 obj-$(CONFIG_TQ_COMMON_BB) += tq_bb.o
+obj-$(CONFIG_TQ_COMMON_SDMMC) += tq_sdmmc.o

board/tq/common/tq_sdmmc.c

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright (C) 2018-2026 TQ-Systems GmbH <u-boot@ew.tq-group.com>,
+ * D-82229 Seefeld, Germany.
+ */
+
+#include <command.h>
+#include <env.h>
+#include <mmc.h>
+#include <stdbool.h>
+#include <vsprintf.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include <linux/errno.h>
+
+#include "tq_bb.h"
+
+static int check_mmc_autodetect(void)
+{
+	/* NO or unset: 0 / YES: 1 */
+	return (env_get_yesno("mmcautodetect") > 0);
+}
+
+/* This should be defined for each board */
+__weak int mmc_map_to_kernel_blk(int dev_no)
+{
+	return dev_no;
+}
+
+void board_late_mmc_env_init(void)
+{
+	char cmd[32];
+	u32 dev_no;
+
+	dev_no = mmc_get_env_dev();
+
+	if (!check_mmc_autodetect())
+		return;
+
+	env_set_ulong("mmcdev", dev_no);
+	env_set_ulong("mmcblkdev", mmc_map_to_kernel_blk(dev_no));
+
+	snprintf(cmd, ARRAY_SIZE(cmd), "mmc dev %d", dev_no);
+	run_command(cmd, 0);
+}