linux-kernel - [PATCH 1/2] pinctrl: mcp23s08: Extend match support for OF tables

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Message-Id: <20230902090937.32195-2-biju.das.jz@bp.renesas.com>
Date:   Sat,  2 Sep 2023 10:09:36 +0100
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Biju Das <biju.das.jz@...renesas.com>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Biju Das <biju.das.au@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 1/2] pinctrl: mcp23s08: Extend match support for OF tables

The driver has OF match table, still it uses ID lookup table for
retrieving match data. Currently the driver is working on the
assumption that a I2C device registered via OF will always match a
legacy I2C device ID. The correct approach is to have an OF device ID
table using of_device_match_data() if the devices are registered via OF.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
 drivers/pinctrl/pinctrl-mcp23s08_i2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-mcp23s08_i2c.c b/drivers/pinctrl/pinctrl-mcp23s08_i2c.c
index 3dd1bd8e73eb..393d9b099cc5 100644
--- a/drivers/pinctrl/pinctrl-mcp23s08_i2c.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08_i2c.c
@@ -10,9 +10,8 @@
 
 static int mcp230xx_probe(struct i2c_client *client)
 {
-	const struct i2c_device_id *id = i2c_client_get_device_id(client);
 	struct device *dev = &client->dev;
-	unsigned int type = id->driver_data;
+	unsigned int type;
 	struct mcp23s08 *mcp;
 	int ret;
 
@@ -20,6 +19,7 @@ static int mcp230xx_probe(struct i2c_client *client)
 	if (!mcp)
 		return -ENOMEM;
 
+	type = (uintptr_t)i2c_get_match_data(client);
 	switch (type) {
 	case MCP_TYPE_008:
 		mcp->regmap = devm_regmap_init_i2c(client, &mcp23x08_regmap);
-- 
2.25.1