linux-kernel - [PATCH 1/1] iio: light: vcnl4035: fixed chip ID check

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Message-Id: <20230427213038.1375404-1-Frank.Li@nxp.com>
Date:   Thu, 27 Apr 2023 17:30:37 -0400
From:   Frank Li <Frank.Li@....com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Petr Machata <petrm@...dia.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Jean Delvare <jdelvare@...e.de>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Parthiban Nallathambi <pn@...x.de>,
        linux-iio@...r.kernel.org (open list:IIO SUBSYSTEM AND DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Cc:     imx@...ts.linux.dev
Subject: [PATCH 1/1] iio: light: vcnl4035: fixed chip ID check

VCNL4035 register(0xE) ID_L and ID_M define as:

 ID_L: 0x80
 ID_H: 7:6 (0:0)
       5:4 (0:0) slave address = 0x60 (7-bit)
           (0:1) slave address = 0x51 (7-bit)
           (1:0) slave address = 0x40 (7-bit)
           (1:0) slave address = 0x41 (7-bit)
       3:0 Version code default	(0:0:0:0)

So just check ID_L.

Fixes: 55707294c4eb ("iio: light: Add support for vishay vcnl4035")

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/iio/light/vcnl4035.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/light/vcnl4035.c b/drivers/iio/light/vcnl4035.c
index 3ed37f6057fb..8b7769930f3b 100644
--- a/drivers/iio/light/vcnl4035.c
+++ b/drivers/iio/light/vcnl4035.c
@@ -413,7 +413,7 @@ static int vcnl4035_init(struct vcnl4035_data *data)
 		return ret;
 	}
 
-	if (id != VCNL4035_DEV_ID_VAL) {
+	if ((id & 0xff) != VCNL4035_DEV_ID_VAL) {
 		dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",
 			id, VCNL4035_DEV_ID_VAL);
 		return -ENODEV;
-- 
2.34.1