linux-kernel - [PATCH v4] hwmon: (tmp401) Add OF device ID table

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Message-ID: <20220503114333.456476-1-camel.guo@axis.com>
Date:   Tue, 3 May 2022 13:43:33 +0200
From:   Camel Guo <camel.guo@...s.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>
CC:     Camel Guo <camel.guo@...s.com>, Wolfram Sang <wsa@...nel.org>,
        Javier Martinez Canillas <javierm@...hat.com>,
        <linux-hwmon@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...s.com>
Subject: [PATCH v4] hwmon: (tmp401) Add OF device ID table

This driver doesn't have of_match_table. This makes the kernel module
tmp401.ko lack alias patterns (e.g: of:N*T*Cti,tmp411) to match DT node
of the supported devices hence this kernel module will not be
automatically loaded.

After adding of_match_table to this driver, the folllowing alias will be
added into tmp401.ko.
$ modinfo drivers/hwmon/tmp401.ko
filename: drivers/hwmon/tmp401.ko
......
author:         Hans de Goede <hdegoede@...hat.com>
alias:          of:N*T*Cti,tmp435C*
alias:          of:N*T*Cti,tmp435
alias:          of:N*T*Cti,tmp432C*
alias:          of:N*T*Cti,tmp432
alias:          of:N*T*Cti,tmp431C*
alias:          of:N*T*Cti,tmp431
alias:          of:N*T*Cti,tmp411C*
alias:          of:N*T*Cti,tmp411
alias:          of:N*T*Cti,tmp401C*
alias:          of:N*T*Cti,tmp401
......

Fixes: af503716ac14 ("i2c: core: report OF style module alias for devices registered via OF")
Signed-off-by: Camel Guo <camel.guo@...s.com>
---

Notes:
    v4:
     - Rewrite commit message due to improper description in old one
    v3:
     - Copy commit message from commit 72fc64c68decf119466 ("hwmon: (tmp103)
       Add OF device ID table")
     - Add Fixes tag
    v2:
     - Put evidence and circumstances in commit message

 drivers/hwmon/tmp401.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index b86d9df7105d..52c9e7d3f2ae 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -708,10 +708,21 @@ static int tmp401_probe(struct i2c_client *client)
 	return 0;
 }

+static const struct of_device_id __maybe_unused tmp4xx_of_match[] = {
+	{ .compatible = "ti,tmp401", },
+	{ .compatible = "ti,tmp411", },
+	{ .compatible = "ti,tmp431", },
+	{ .compatible = "ti,tmp432", },
+	{ .compatible = "ti,tmp435", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, tmp4xx_of_match);
+
 static struct i2c_driver tmp401_driver = {
 	.class		= I2C_CLASS_HWMON,
 	.driver = {
 		.name	= "tmp401",
+		.of_match_table = of_match_ptr(tmp4xx_of_match),
 	},
 	.probe_new	= tmp401_probe,
 	.id_table	= tmp401_id,

base-commit: 38d741cb70b30741c0e802cbed7bd9cf4fd15fa4
-- 
2.30.2