commit bd42c17591daa78c7fbf074ba939ba502255291b
author developer <developer@mediatek.com> Mon Jul 18 17:51:30 2022 +0800
committer developer <developer@mediatek.com> Tue Jul 19 11:11:23 2022 +0800
tree ce4bf0e8fa236b63235c0f45ac6539c6213907c8
parent 8970ccb628fb11bb4057b89685052de3e7d27ec7

[][add reset option to disable reset for debug]

[Description]
Add reset option for quickly debug purpose
-- echo 0 to disable reset when err occur
-- echo 2 to recovery reset after echo 0
-- echo 1 force to reset

[Release-log]

Change-Id: I98b8eea32bf3de9a4f1e705a6a87f2f798560bc6
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6263896

target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_dbg.c

diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_dbg.c b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_dbg.c
index 38d2b53..0d5ca16 100755
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_dbg.c
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_dbg.c
@@ -319,10 +319,42 @@
 				    size_t len, loff_t *off)
 {
 	struct mtk_eth *eth = file->private_data;
+	char buf[8] = "";
+	int count = len;
+	unsigned long dbg_level = 0;
+
+	len = min(count, sizeof(buf) - 1);
+	if (copy_from_user(buf, ptr, len))
+		return -EFAULT;
+
+	buf[len] = '\0';
+	if (kstrtoul(buf, 0, &dbg_level))
+		return -EINVAL;
 
-	atomic_inc(&force);
-	schedule_work(&eth->pending_work);
-	return len;
+	switch(dbg_level)
+	{
+		case 0:
+			if (atomic_read(&reset_lock) == 0)
+				atomic_inc(&reset_lock);
+			break;
+		case 1:
+			if (atomic_read(&force) == 0)
+				atomic_inc(&force);
+			schedule_work(&eth->pending_work);
+			break;
+		case 2:
+			if (atomic_read(&reset_lock) == 1)
+				atomic_dec(&reset_lock);
+			break;
+		default:
+			pr_info("Usage: echo [level] > /sys/kernel/debug/mtketh/reset\n");
+			pr_info("Commands:	 [level] \n");
+			pr_info("			   0	 disable reset \n");
+			pr_info("			   1	 force reset \n");
+			pr_info("			   2	 enable reset\n");
+			break;
+	}
+	return count;
 }
 
 static const struct file_operations fops_reg_w = {