[PATCH 4.19 048/175] hwmon: (amc6821) add of_match table

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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Josua Mayer <josua@xxxxxxxxxxxxx>

[ Upstream commit 3f003fda98a7a8d5f399057d92e6ed56b468657c ]

Add of_match table for "ti,amc6821" compatible string.
This fixes automatic driver loading by userspace when using device-tree,
and if built as a module like major linux distributions do.

While devices probe just fine with i2c_device_id table, userspace can't
match the "ti,amc6821" compatible string from dt with the plain
"amc6821" device id. As a result, the kernel module can not be loaded.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Josua Mayer <josua@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240307-amc6821-of-match-v1-1-5f40464a3110@xxxxxxxxxxxxx
[groeck: Cleaned up patch description]
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/hwmon/amc6821.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index 46b4e35fd5555..b562337df7b3c 100644
--- a/drivers/hwmon/amc6821.c
+++ b/drivers/hwmon/amc6821.c
@@ -1003,10 +1003,21 @@ static const struct i2c_device_id amc6821_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, amc6821_id);
 
+static const struct of_device_id __maybe_unused amc6821_of_match[] = {
+	{
+		.compatible = "ti,amc6821",
+		.data = (void *)amc6821,
+	},
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, amc6821_of_match);
+
 static struct i2c_driver amc6821_driver = {
 	.class = I2C_CLASS_HWMON,
 	.driver = {
 		.name	= "amc6821",
+		.of_match_table = of_match_ptr(amc6821_of_match),
 	},
 	.probe = amc6821_probe,
 	.id_table = amc6821_id,
-- 
2.43.0







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