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From:   Biju Das <biju.das.jz@bp.renesas.com>
To:     Linus Walleij <linus.walleij@linaro.org>
Cc:     Biju Das <biju.das.jz@bp.renesas.com>, linux-gpio@vger.kernel.org,
        linux-kernel@vger.kernel.org, Biju Das <biju.das.au@gmail.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v3 1/3] pinctrl: mcp23s08_i2c: Extend match support for OF tables
Date:   Sun, 24 Sep 2023 18:23:18 +0100
Message-Id: <20230924172320.15165-2-biju.das.jz@bp.renesas.com>
In-Reply-To: <20230924172320.15165-1-biju.das.jz@bp.renesas.com>
References: <20230924172320.15165-1-biju.das.jz@bp.renesas.com>
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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@bp.renesas.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2->v3:
 * Added Rb tag from Andy.
v1->v2:
 * Arranged variable declaration in reverse xmas tree.
---
 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..41ea2650a7e4 100644
--- a/drivers/pinctrl/pinctrl-mcp23s08_i2c.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08_i2c.c
@@ -10,16 +10,16 @@
 
 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;
 	struct mcp23s08 *mcp;
+	unsigned int type;
 	int ret;
 
 	mcp = devm_kzalloc(dev, sizeof(*mcp), GFP_KERNEL);
 	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