linux-kernel - [PATCH 3/8] tty: 8250_uniphier: Use devm_clk_get

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Message-Id: <20240822033924.32397-4-liulei.rjpt@vivo.com>
Date: Thu, 22 Aug 2024 11:39:07 +0800
From: Lei Liu <liulei.rjpt@...o.com>
To: Paul Cercueil <paul@...pouillou.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
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Cc: opensource.kernel@...o.com
Subject: [PATCH 3/8] tty: 8250_uniphier: Use devm_clk_get_enabled() helpers

The devm_clk_get_enabled() helpers:
    - call devm_clk_get()
    - call clk_prepare_enable() and register what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids calls to clk_disable_unprepare().

Signed-off-by: Lei Liu <liulei.rjpt@...o.com>
---
 drivers/tty/serial/8250/8250_uniphier.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c
index 670d2ca0f757..6ddc4262d22b 100644
--- a/drivers/tty/serial/8250/8250_uniphier.c
+++ b/drivers/tty/serial/8250/8250_uniphier.c
@@ -180,16 +180,12 @@ static int uniphier_uart_probe(struct platform_device *pdev)
 
 	memset(&up, 0, sizeof(up));
 
-	priv->clk = devm_clk_get(dev, NULL);
+	priv->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(priv->clk)) {
 		dev_err(dev, "failed to get clock\n");
 		return PTR_ERR(priv->clk);
 	}
 
-	ret = clk_prepare_enable(priv->clk);
-	if (ret)
-		return ret;
-
 	up.port.uartclk = clk_get_rate(priv->clk);
 
 	spin_lock_init(&priv->atomic_write_lock);
@@ -222,7 +218,6 @@ static int uniphier_uart_probe(struct platform_device *pdev)
 	ret = serial8250_register_8250_port(&up);
 	if (ret < 0) {
 		dev_err(dev, "failed to register 8250 port\n");
-		clk_disable_unprepare(priv->clk);
 		return ret;
 	}
 	priv->line = ret;
@@ -237,7 +232,6 @@ static void uniphier_uart_remove(struct platform_device *pdev)
 	struct uniphier8250_priv *priv = platform_get_drvdata(pdev);
 
 	serial8250_unregister_port(priv->line);
-	clk_disable_unprepare(priv->clk);
 }
 
 static int __maybe_unused uniphier_uart_suspend(struct device *dev)
-- 
2.34.1