diff mbox series

[net-next,2/3] nfc: s3fwrn5: reduce the EN_WAIT_TIME

Message ID 1606404819-30647-2-git-send-email-bongsu.jeon@samsung.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series [net-next,1/3] nfc: s3fwrn5: use signed integer for parsing GPIO numbers | expand

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Commit Message

Bongsu Jeon Nov. 26, 2020, 3:33 p.m. UTC
From: Bongsu Jeon <bongsu.jeon@samsung.com>

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

Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
---
 drivers/nfc/s3fwrn5/i2c.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Krzysztof Kozlowski Nov. 26, 2020, 5:03 p.m. UTC | #1
On Fri, Nov 27, 2020 at 12:33:38AM +0900, bongsu.jeon2@gmail.com wrote:
> From: Bongsu Jeon <bongsu.jeon@samsung.com>
> 
> The delay of 20ms is enough to enable and
> wake up the Samsung's nfc chip.
> 
> Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
> ---
>  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 @@
>  

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof
diff mbox series

Patch

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;