From: Bongsu Jeon <bongsu.jeon@xxxxxxxxxxx>
The delay of 20ms is enough to enable and
wake up the Samsung's nfc chip.
Acked-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Signed-off-by: Bongsu Jeon <bongsu.jeon@xxxxxxxxxxx>
---
drivers/nfc/s3fwrn5/i2c.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
index ae26594..9a64eea 100644
--- 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;
--
1.9.1
