ARM: dts: imx: Add support for DH electronics i.MX8M Plus DHCOM and PDK2
Add support for DH electronics i.MX8M Plus DHCOM SoM on PDK2 carrier board.
Currently supported are serial console, EQoS and FEC ethernets, eMMC, SD,
SPI NOR and USB 3.0 host.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/board/dhelectronics/dh_imx8mp/common.c b/board/dhelectronics/dh_imx8mp/common.c
new file mode 100644
index 0000000..44456da
--- /dev/null
+++ b/board/dhelectronics/dh_imx8mp/common.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2022 Marek Vasut <marex@denx.de>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm-generic/gpio.h>
+
+#include "lpddr4_timing.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+u8 dh_get_memcfg(void)
+{
+ struct gpio_desc gpio[4];
+ u8 memcfg = 0;
+ ofnode node;
+ int i, ret;
+
+ node = ofnode_path("/config");
+ if (!ofnode_valid(node)) {
+ printf("%s: no /config node?\n", __func__);
+ return BIT(2) | BIT(0);
+ }
+
+ ret = gpio_request_list_by_name_nodev(node,
+ "dh,ram-coding-gpios",
+ gpio, ARRAY_SIZE(gpio),
+ GPIOD_IS_IN);
+ for (i = 0; i < ret; i++)
+ memcfg |= !!dm_gpio_get_value(&(gpio[i])) << i;
+
+ gpio_free_list_nodev(gpio, ret);
+
+ return memcfg;
+}