[PATCH net-next v2] nfc: s3fwrn5: use devm_clk_get_optional_enabled() helper

[PATCH net-next v2] nfc: s3fwrn5: use devm_clk_get_optional_enabled() helper

[Dmitry Torokhov]

Because we enable the clock immediately after acquiring it in probe,
we can combine the 2 operations and use devm_clk_get_optional_enabled()
helper.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

v2: remove calls to clk_disable_unprepare() as they are not needed anymore

 drivers/nfc/s3fwrn5/i2c.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
index f824dc7099ce..ecdee838d25d 100644
--- a/drivers/nfc/s3fwrn5/i2c.c
+++ b/drivers/nfc/s3fwrn5/i2c.c
@@ -209,27 +209,21 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	phy->clk = devm_clk_get_optional(&client->dev, NULL);
-	if (IS_ERR(phy->clk))
-		return dev_err_probe(&client->dev, PTR_ERR(phy->clk),
-				     "failed to get clock\n");
-
 	/*
 	 * S3FWRN5 depends on a clock input ("XI" pin) to function properly.
 	 * Depending on the hardware configuration this could be an always-on
 	 * oscillator or some external clock that must be explicitly enabled.
 	 * Make sure the clock is running before starting S3FWRN5.
 	 */
-	ret = clk_prepare_enable(phy->clk);
-	if (ret < 0) {
-		dev_err(&client->dev, "failed to enable clock: %d\n", ret);
-		return ret;
-	}
+	phy->clk = devm_clk_get_optional_enabled(&client->dev, NULL);
+	if (IS_ERR(phy->clk))
+		return dev_err_probe(&client->dev, PTR_ERR(phy->clk),
+				     "failed to get clock\n");
 
 	ret = s3fwrn5_probe(&phy->common.ndev, phy, &phy->i2c_dev->dev,
 			    &i2c_phy_ops);
 	if (ret < 0)
-		goto disable_clk;
+		return ret;
 
 	ret = devm_request_threaded_irq(&client->dev, phy->i2c_dev->irq, NULL,
 		s3fwrn5_i2c_irq_thread_fn, IRQF_ONESHOT,
@@ -241,8 +235,6 @@ static int s3fwrn5_i2c_probe(struct i2c_client *client,
 
 s3fwrn5_remove:
 	s3fwrn5_remove(phy->common.ndev);
-disable_clk:
-	clk_disable_unprepare(phy->clk);
 	return ret;
 }
 
@@ -251,7 +243,6 @@ static void s3fwrn5_i2c_remove(struct i2c_client *client)
 	struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client);
 
 	s3fwrn5_remove(phy->common.ndev);
-	clk_disable_unprepare(phy->clk);
 }
 
 static const struct i2c_device_id s3fwrn5_i2c_id_table[] = {
-- 
2.38.0.135.g90850a2211-goog


-- 
Dmitry

Re: [PATCH net-next v2] nfc: s3fwrn5: use devm_clk_get_optional_enabled() helper

[Krzysztof Kozlowski]

On 27/10/2022 03:34, Dmitry Torokhov wrote:
> Because we enable the clock immediately after acquiring it in probe,
> we can combine the 2 operations and use devm_clk_get_optional_enabled()
> helper.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
> 


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH net-next v2] nfc: s3fwrn5: use devm_clk_get_optional_enabled() helper

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Thu, 27 Oct 2022 00:34:02 -0700 you wrote:
> Because we enable the clock immediately after acquiring it in probe,
> we can combine the 2 operations and use devm_clk_get_optional_enabled()
> helper.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
> 
> [...]

Here is the summary with links:
  - [net-next,v2] nfc: s3fwrn5: use devm_clk_get_optional_enabled() helper
    https://git.kernel.org/netdev/net-next/c/f8f797f35a9a

You are awesome, thank you!
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