linux-kernel - [PATCH 5/8] tty: mps2-uart: Use devm_clk_get

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Message-Id: <20240822033924.32397-6-liulei.rjpt@vivo.com>
Date: Thu, 22 Aug 2024 11:39:09 +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 5/8] tty: mps2-uart: 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/mps2-uart.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
index 2a4c09f3a834..e582fd6c4632 100644
--- a/drivers/tty/serial/mps2-uart.c
+++ b/drivers/tty/serial/mps2-uart.c
@@ -550,19 +550,12 @@ static int mps2_init_port(struct platform_device *pdev,
 	mps_port->port.ops = &mps2_uart_pops;
 	mps_port->port.dev = &pdev->dev;
 
-	mps_port->clk = devm_clk_get(&pdev->dev, NULL);
+	mps_port->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(mps_port->clk))
 		return PTR_ERR(mps_port->clk);
 
-	ret = clk_prepare_enable(mps_port->clk);
-	if (ret)
-		return ret;
-
 	mps_port->port.uartclk = clk_get_rate(mps_port->clk);
 
-	clk_disable_unprepare(mps_port->clk);
-
-
 	if (mps_port->flags & UART_PORT_COMBINED_IRQ) {
 		mps_port->port.irq = platform_get_irq(pdev, 0);
 	} else {
-- 
2.34.1