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@nxp.com>
Link: https://lore.kernel.org/r/20230501143605.1615549-1-Frank.Li@nxp.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/light/vcnl4035.c b/drivers/iio/light/vcnl4035.c
index 14e29330e972eb91f094a284913fb57e79e50572..94f5d611e98c3c80225737dd837a3d25d834aa9d 100644 (file)
--- a/drivers/iio/light/vcnl4035.c
+++ b/drivers/iio/light/vcnl4035.c
@@ -8,6 +8,7 @@
  * TODO: Proximity
  */
 #include <linux/bitops.h>
+#include <linux/bitfield.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
@@ -42,6 +43,7 @@
 #define VCNL4035_ALS_PERS_MASK         GENMASK(3, 2)
 #define VCNL4035_INT_ALS_IF_H_MASK     BIT(12)
 #define VCNL4035_INT_ALS_IF_L_MASK     BIT(13)
+#define VCNL4035_DEV_ID_MASK           GENMASK(7, 0)
 
 /* Default values */
 #define VCNL4035_MODE_ALS_ENABLE       BIT(0)
@@ -413,6 +415,7 @@ static int vcnl4035_init(struct vcnl4035_data *data)
                return ret;
        }
 
+       id = FIELD_GET(VCNL4035_DEV_ID_MASK, id);
        if (id != VCNL4035_DEV_ID_VAL) {
                dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",
                        id, VCNL4035_DEV_ID_VAL);