1 files changed, 47 insertions, 0 deletions
diff --git a/cmd/hwrev.c b/cmd/hwrev.c
new file mode 100644
index 0000000000..e58c591be6
--- /dev/null
+++ b/cmd/hwrev.c
@@ -0,0 +1,47 @@
+/*
+ * (C) Copyright 2020 Hardkernel Co., Ltd
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <adc.h>
+
+#define check_range(min,max,val) (val > 0 && val > min && val < max ? 1 : 0)
+
+int do_hwrev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	unsigned int hwrev_adc;
+
+	if (adc_channel_single_shot("saradc", 0, &hwrev_adc)) {
+		printf("board hw rev failed\n");
+		return CMD_RET_FAILURE;
+	}
+
+	/* rev 1.1 */
+	if (check_range(898, 978, hwrev_adc)) {
+		env_set("hwrev", "v11");
+		env_set("dtb_name", "rk3326-odroidgo2-linux-v11.dtb");
+	}
+	/* rev 1.0 */
+	else if (check_range(816, 896, hwrev_adc)) {
+		env_set("hwrev", "v10");
+		env_set("dtb_name", "rk3326-odroidgo2-linux.dtb");
+	}
+	/* engineer samples */
+	else {
+		env_set("hwrev", "v00");
+		env_set("dtb_name", "rk3326-odroidgo2-linux.dtb");
+	}
+
+	debug("adc0 (hw rev) %d\n", hwrev_adc);
+
+	return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(
+	hwrev, 1, 1, do_hwrev,
+	"check hw revision of OGA",
+	""
+);