1 files changed, 108 insertions, 0 deletions
diff --git a/board/friendlyarm/nanopi2/hwrev.c b/board/friendlyarm/nanopi2/hwrev.c
new file mode 100644
index 0000000000..b1e23a48a8
--- /dev/null
+++ b/board/friendlyarm/nanopi2/hwrev.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) Guangzhou FriendlyARM Computer Tech. Co., Ltd.
+ * (http://www.friendlyarm.com)
+ */
+
+#include <config.h>
+#include <common.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+#include <asm/arch/nexell.h>
+#include <asm/arch/nx_gpio.h>
+
+/* Board revision list: <PCB3 | PCB2 | PCB1>
+ *  0b000 - NanoPi 2
+ *  0b001 - NanoPC-T2
+ *  0b010 - NanoPi S2
+ *  0b011 - Smart4418
+ *  0b100 - NanoPi Fire 2A
+ *  0b111 - NanoPi M2A
+ *
+ * Extented revision:
+ *  0b001 - Smart4418-SDK
+ */
+#define __IO_GRP		2	/* GPIO_C */
+#define __IO_PCB1		26
+#define __IO_PCB2		27
+#define __IO_PCB3		25
+
+static int pcb_rev = -1;
+static int base_rev;
+
+static void bd_hwrev_config_gpio(void)
+{
+	int gpios[3][2] = {
+		{ __IO_PCB1, 1 },
+		{ __IO_PCB2, 1 },
+		{ __IO_PCB3, 1 },
+	};
+	int i;
+
+	/* gpio input mode, pull-down */
+	for (i = 0; i < 3; i++) {
+		nx_gpio_set_pad_function(__IO_GRP, gpios[i][0], gpios[i][1]);
+		nx_gpio_set_output_enable(__IO_GRP, gpios[i][0], 0);
+		nx_gpio_set_pull_mode(__IO_GRP, gpios[i][0], 0);
+	}
+}
+
+void bd_hwrev_init(void)
+{
+	if (pcb_rev >= 0)
+		return;
+
+	bd_hwrev_config_gpio();
+
+	pcb_rev  = nx_gpio_get_input_value(__IO_GRP, __IO_PCB1);
+	pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB2) << 1;
+	pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB3) << 2;
+}
+
+/* Get extended revision for SmartXX18 */
+void bd_base_rev_init(void)
+{
+	struct udevice *dev;
+	u8 val = 0;
+
+	if (pcb_rev != 0x3)
+		return;
+
+#define PCA9536_I2C_BUS     2
+#define PCA9636_I2C_ADDR    0x41
+	if (i2c_get_chip_for_busnum
+				(PCA9536_I2C_BUS, PCA9636_I2C_ADDR, 1, &dev))
+		return;
+
+	if (!dm_i2c_read(dev, 0, &val, 1))
+		base_rev = (val & 0xf);
+}
+
+/* To override __weak symbols */
+u32 get_board_rev(void)
+{
+	return (base_rev << 8) | pcb_rev;
+}
+
+const char *get_board_name(void)
+{
+	bd_hwrev_init();
+
+	switch (pcb_rev) {
+	case 0:
+		return "NanoPi 2";
+	case 1:
+		return "NanoPC-T2";
+	case 2:
+		return "NanoPi S2";
+	case 3:
+		return "Smart4418";
+	case 4:
+		return "NanoPi Fire 2A";
+	case 7:
+		return "NanoPi M2A";
+	default:
+		return "s5p4418-X";
+	}
+}