linux-kernel - [PATCH 7/8] tty: st-asc: Use devm_clk_get

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Message-Id: <20240822033924.32397-8-liulei.rjpt@vivo.com>
Date: Thu, 22 Aug 2024 11:39:11 +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>,
	Thierry Reding <thierry.reding@...il.com>,
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	Claudiu Beznea <claudiu.beznea@...on.dev>,
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	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Lei Liu <liulei.rjpt@...o.com>,
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	Lino Sanfilippo <l.sanfilippo@...bus.com>,
	Erwan Le Ray <erwan.leray@...s.st.com>,
	linux-mips@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
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Cc: opensource.kernel@...o.com
Subject: [PATCH 7/8] tty: st-asc: 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/st-asc.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index f91753a40a69..df666766d50e 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -706,17 +706,13 @@ static int asc_init_port(struct asc_port *ascport,
 
 	spin_lock_init(&port->lock);
 
-	ascport->clk = devm_clk_get(&pdev->dev, NULL);
+	ascport->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 
 	if (WARN_ON(IS_ERR(ascport->clk)))
 		return -EINVAL;
-	/* ensure that clk rate is correct by enabling the clk */
-	ret = clk_prepare_enable(ascport->clk);
-	if (ret)
-		return ret;
+
 	ascport->port.uartclk = clk_get_rate(ascport->clk);
 	WARN_ON(ascport->port.uartclk == 0);
-	clk_disable_unprepare(ascport->clk);
 
 	ascport->pinctrl = devm_pinctrl_get(&pdev->dev);
 	if (IS_ERR(ascport->pinctrl)) {
-- 
2.34.1