1 files changed, 74 insertions, 0 deletions
diff --git a/arch/arm/boards/nxp-imx8mn-evk/board.c b/arch/arm/boards/nxp-imx8mn-evk/board.c
new file mode 100644
index 0000000000..3e90ba284c
--- /dev/null
+++ b/arch/arm/boards/nxp-imx8mn-evk/board.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Ahmad Fatoum, Pengutronix
+ */
+
+#include <bootsource.h>
+#include <common.h>
+#include <deep-probe.h>
+#include <init.h>
+#include <linux/phy.h>
+#include <linux/sizes.h>
+#include <mach/imx/bbu.h>
+#include <envfs.h>
+
+#define PHY_ID_AR8031	0x004dd074
+#define AR_PHY_ID_MASK	0xffffffff
+
+static int ar8031_phy_fixup(struct phy_device *phydev)
+{
+	/*
+	 * Enable 1.8V(SEL_1P5_1P8_POS_REG) on
+	 * Phy control debug reg 0
+	 */
+	phy_write(phydev, 0x1d, 0x1f);
+	phy_write(phydev, 0x1e, 0x8);
+
+	/* rgmii tx clock delay enable */
+	phy_write(phydev, 0x1d, 0x05);
+	phy_write(phydev, 0x1e, 0x100);
+
+	return 0;
+}
+
+static int imx8mn_evk_probe(struct device *dev)
+{
+	int emmc_bbu_flag = 0;
+	int sd_bbu_flag = 0;
+
+	if (bootsource_get() == BOOTSOURCE_MMC) {
+		if (bootsource_get_instance() == 2) {
+			of_device_enable_path("/chosen/environment-emmc");
+			emmc_bbu_flag = BBU_HANDLER_FLAG_DEFAULT;
+		} else {
+			of_device_enable_path("/chosen/environment-sd");
+			sd_bbu_flag = BBU_HANDLER_FLAG_DEFAULT;
+		}
+	} else {
+		of_device_enable_path("/chosen/environment-emmc");
+		emmc_bbu_flag = BBU_HANDLER_FLAG_DEFAULT;
+	}
+
+	imx8m_bbu_internal_mmc_register_handler("SD", "/dev/mmc1.barebox", sd_bbu_flag);
+	imx8m_bbu_internal_mmcboot_register_handler("eMMC", "/dev/mmc2", emmc_bbu_flag);
+	imx8m_bbu_internal_flexspi_nor_register_handler("QSPI", "/dev/m25p0.barebox", 0);
+
+	phy_register_fixup_for_uid(PHY_ID_AR8031, AR_PHY_ID_MASK,
+				   ar8031_phy_fixup);
+
+	return 0;
+}
+
+static const struct of_device_id imx8mn_evk_of_match[] = {
+	{ .compatible = "fsl,imx8mn-evk" },
+	{ .compatible = "fsl,imx8mn-ddr4-evk" },
+	{ /* sentinel */ },
+};
+BAREBOX_DEEP_PROBE_ENABLE(imx8mn_evk_of_match);
+
+static struct driver imx8mn_evkboard_driver = {
+	.name = "board-imx8mn-evk",
+	.probe = imx8mn_evk_probe,
+	.of_compatible = DRV_OF_COMPAT(imx8mn_evk_of_match),
+};
+coredevice_platform_driver(imx8mn_evkboard_driver);