linux-kernel - [PATCH v1 2/3] auxdisplay: ht16k33: Make use of device_get_match

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Message-Id: <20230221133307.20287-3-andriy.shevchenko@linux.intel.com>
Date:   Tue, 21 Feb 2023 15:33:06 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Raul E Rangel <rrangel@...omium.org>,
        Wolfram Sang <wsa@...nel.org>, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-usb@...r.kernel.org
Cc:     Robin van der Gracht <robin@...tonic.nl>,
        Miguel Ojeda <ojeda@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v1 2/3] auxdisplay: ht16k33: Make use of device_get_match_data()

Switching to use device_get_match_data() helps getting of
i2c_of_match_device() API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/auxdisplay/ht16k33.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index 02425991c159..8e2fd2291ea4 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -60,7 +60,8 @@
 #define HT16K33_FB_SIZE		(HT16K33_MATRIX_LED_MAX_COLS * BYTES_PER_ROW)
 
 enum display_type {
-	DISP_MATRIX = 0,
+	DISP_UNKNOWN = 0,
+	DISP_MATRIX,
 	DISP_QUAD_7SEG,
 	DISP_QUAD_14SEG,
 };
@@ -675,6 +676,7 @@ static int ht16k33_seg_probe(struct device *dev, struct ht16k33_priv *priv,
 		return err;
 
 	switch (priv->type) {
+	default:
 	case DISP_MATRIX:
 		/* not handled here */
 		err = -EINVAL;
@@ -713,7 +715,6 @@ static int ht16k33_seg_probe(struct device *dev, struct ht16k33_priv *priv,
 static int ht16k33_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
-	const struct of_device_id *id;
 	struct ht16k33_priv *priv;
 	uint32_t dft_brightness;
 	int err;
@@ -728,9 +729,8 @@ static int ht16k33_probe(struct i2c_client *client)
 		return -ENOMEM;
 
 	priv->client = client;
-	id = i2c_of_match_device(dev->driver->of_match_table, client);
-	if (id)
-		priv->type = (uintptr_t)id->data;
+	priv->type = (uintptr_t)device_get_match_data(dev);
+
 	i2c_set_clientdata(client, priv);
 
 	err = ht16k33_initialize(priv);
@@ -771,6 +771,9 @@ static int ht16k33_probe(struct i2c_client *client)
 		/* Segment Display */
 		err = ht16k33_seg_probe(dev, priv, dft_brightness);
 		break;
+	default:
+		/* Unknown display; enumerated via user space? */
+		err = 0;
 	}
 	return err;
 }
@@ -795,6 +798,8 @@ static void ht16k33_remove(struct i2c_client *client)
 		device_remove_file(&client->dev, &dev_attr_map_seg7);
 		device_remove_file(&client->dev, &dev_attr_map_seg14);
 		break;
+	default:
+		break;
 	}
 }
 
-- 
2.39.1