nfc: s3fwrn5: use signed integer for parsing GPIO numbers

GPIOs - as returned by of_get_named_gpio() and used by the gpiolib - are
signed integers, where negative number indicates error.  The return
value of of_get_named_gpio() should not be assigned to an unsigned int
because in case of !CONFIG_GPIOLIB such number would be a valid GPIO.

Fixes: c04c674fadeb ("nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201123162351.209100-1-krzk@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
index dc99528..d0a3bd9 100644 (file)
--- a/drivers/nfc/s3fwrn5/i2c.c
+++ b/drivers/nfc/s3fwrn5/i2c.c
@@ -26,8 +26,8 @@ struct s3fwrn5_i2c_phy {
        struct i2c_client *i2c_dev;
        struct nci_dev *ndev;
 
-       unsigned int gpio_en;
-       unsigned int gpio_fw_wake;
+       int gpio_en;
+       int gpio_fw_wake;
 
        struct mutex mutex;