Commit 337da149 authored by Bongsu Jeon's avatar Bongsu Jeon Committed by Jakub Kicinski
Browse files

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: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarBongsu Jeon <bongsu.jeon@samsung.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 36d07620

drivers/nfc/s3fwrn5/i2c.c

+3 −3
Original line number Diff line number Diff line
@@ -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;