linux-kernel - [PATCH v1 1/1] serial: 8250_dw: Use devm_clk_get_optional

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Message-Id: <20230919195513.3197930-1-andriy.shevchenko@linux.intel.com>
Date:   Tue, 19 Sep 2023 22:55:13 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Cc:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Andi Shyti <andi.shyti@...ux.intel.com>
Subject: [PATCH v1 1/1] serial: 8250_dw: Use devm_clk_get_optional_enabled()

Use devm_clk_get_optional_enabled() to simplify the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@...ux.intel.com>
---
 drivers/tty/serial/8250/8250_dw.c | 27 +++------------------------
 1 file changed, 3 insertions(+), 24 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index f4cafca1a7da..bdd7ed282061 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -498,11 +498,6 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
 	}
 }
 
-static void dw8250_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static void dw8250_reset_control_assert(void *data)
 {
 	reset_control_assert(data);
@@ -598,23 +593,15 @@ static int dw8250_probe(struct platform_device *pdev)
 	device_property_read_u32(dev, "clock-frequency", &p->uartclk);
 
 	/* If there is separate baudclk, get the rate from it. */
-	data->clk = devm_clk_get_optional(dev, "baudclk");
+	data->clk = devm_clk_get_optional_enabled(dev, "baudclk");
 	if (data->clk == NULL)
-		data->clk = devm_clk_get_optional(dev, NULL);
+		data->clk = devm_clk_get_optional_enabled(dev, NULL);
 	if (IS_ERR(data->clk))
 		return PTR_ERR(data->clk);
 
 	INIT_WORK(&data->clk_work, dw8250_clk_work_cb);
 	data->clk_notifier.notifier_call = dw8250_clk_notifier_cb;
 
-	err = clk_prepare_enable(data->clk);
-	if (err)
-		return dev_err_probe(dev, err, "could not enable optional baudclk\n");
-
-	err = devm_add_action_or_reset(dev, dw8250_clk_disable_unprepare, data->clk);
-	if (err)
-		return err;
-
 	if (data->clk)
 		p->uartclk = clk_get_rate(data->clk);
 
@@ -622,18 +609,10 @@ static int dw8250_probe(struct platform_device *pdev)
 	if (!p->uartclk)
 		return dev_err_probe(dev, -EINVAL, "clock rate not defined\n");
 
-	data->pclk = devm_clk_get_optional(dev, "apb_pclk");
+	data->pclk = devm_clk_get_optional_enabled(dev, "apb_pclk");
 	if (IS_ERR(data->pclk))
 		return PTR_ERR(data->pclk);
 
-	err = clk_prepare_enable(data->pclk);
-	if (err)
-		return dev_err_probe(dev, err, "could not enable apb_pclk\n");
-
-	err = devm_add_action_or_reset(dev, dw8250_clk_disable_unprepare, data->pclk);
-	if (err)
-		return err;
-
 	data->rst = devm_reset_control_get_optional_exclusive(dev, NULL);
 	if (IS_ERR(data->rst))
 		return PTR_ERR(data->rst);
-- 
2.40.0.1.gaa8946217a0b