mtd: rawnand: arasan: Use helper function devm_clk_get_enabled()

Since commit 7ef9651 ("clk: Provide new devm_clk helpers for prepared
and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be
replaced by devm_clk_get_enabled() when driver enables (and possibly
prepares) the clocks for the whole lifetime of the device. Moreover, it is
no longer necessary to unprepare and disable the clocks explicitly, so drop
the label "disable_bus_clk" and "disable_controller_clk".

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230821031737.1973183-3-lizetao1@huawei.com

Author: Li Zetao

drivers/mtd/nand/raw/arasan-nand-controller.c

@@ -1440,55 +1440,36 @@ static int anfc_probe(struct platform_device *pdev)
 
 	anfc_reset(nfc);
 
-	nfc->controller_clk = devm_clk_get(&pdev->dev, "controller");
+	nfc->controller_clk = devm_clk_get_enabled(&pdev->dev, "controller");
 	if (IS_ERR(nfc->controller_clk))
 		return PTR_ERR(nfc->controller_clk);
 
-	nfc->bus_clk = devm_clk_get(&pdev->dev, "bus");
+	nfc->bus_clk = devm_clk_get_enabled(&pdev->dev, "bus");
 	if (IS_ERR(nfc->bus_clk))
 		return PTR_ERR(nfc->bus_clk);
 
-	ret = clk_prepare_enable(nfc->controller_clk);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(nfc->bus_clk);
-	if (ret)
-		goto disable_controller_clk;
-
 	ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
 	if (ret)
-		goto disable_bus_clk;
+		return ret;
 
 	ret = anfc_parse_cs(nfc);
 	if (ret)
-		goto disable_bus_clk;
+		return ret;
 
 	ret = anfc_chips_init(nfc);
 	if (ret)
-		goto disable_bus_clk;
+		return ret;
 
 	platform_set_drvdata(pdev, nfc);
 
 	return 0;
-
-disable_bus_clk:
-	clk_disable_unprepare(nfc->bus_clk);
-
-disable_controller_clk:
-	clk_disable_unprepare(nfc->controller_clk);
-
-	return ret;
 }
 
 static void anfc_remove(struct platform_device *pdev)
 {
 	struct arasan_nfc *nfc = platform_get_drvdata(pdev);
 
 	anfc_chips_cleanup(nfc);
-
-	clk_disable_unprepare(nfc->bus_clk);
-	clk_disable_unprepare(nfc->controller_clk);
 }
 
 static const struct of_device_id anfc_ids[] = {