nfc: s3fwrn5: reduce the EN_WAIT_TIME

The delay of 20ms is enough to enable and
wake up the Samsung's nfc chip.

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
index ae26594..9a64eea 100644 (file)
--- a/drivers/nfc/s3fwrn5/i2c.c
+++ b/drivers/nfc/s3fwrn5/i2c.c
@@ -19,7 +19,7 @@
 
 #define S3FWRN5_I2C_DRIVER_NAME "s3fwrn5_i2c"
 
-#define S3FWRN5_EN_WAIT_TIME 150
+#define S3FWRN5_EN_WAIT_TIME 20
 
 struct s3fwrn5_i2c_phy {
        struct i2c_client *i2c_dev;
@@ -40,7 +40,7 @@ static void s3fwrn5_i2c_set_wake(void *phy_id, bool wake)
 
        mutex_lock(&phy->mutex);
        gpio_set_value(phy->gpio_fw_wake, wake);
-       msleep(S3FWRN5_EN_WAIT_TIME/2);
+       msleep(S3FWRN5_EN_WAIT_TIME);
        mutex_unlock(&phy->mutex);
 }
 
@@ -63,7 +63,7 @@ static void s3fwrn5_i2c_set_mode(void *phy_id, enum s3fwrn5_mode mode)
        if (mode != S3FWRN5_MODE_COLD) {
                msleep(S3FWRN5_EN_WAIT_TIME);
                gpio_set_value(phy->gpio_en, 0);
-               msleep(S3FWRN5_EN_WAIT_TIME/2);
+               msleep(S3FWRN5_EN_WAIT_TIME);
        }
 
        phy->irq_skip = true;