mtd: st_spi_fsm: Use the devm_clk_get_enabled() helper function

Use the devm_clk_get_enabled() helper function instead of hand-writing it.
It saves some line of codes.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/4025ec3980a956b0e776024e88ec960afc457501.1681636580.git.christophe.jaillet@wanadoo.fr

drivers/mtd/devices/st_spi_fsm.c

@@ -2046,34 +2046,26 @@ static int stfsm_probe(struct platform_device *pdev)
 		return PTR_ERR(fsm->base);
 	}
 
-	fsm->clk = devm_clk_get(&pdev->dev, NULL);
+	fsm->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(fsm->clk)) {
 		dev_err(fsm->dev, "Couldn't find EMI clock.\n");
 		return PTR_ERR(fsm->clk);
 	}
 
-	ret = clk_prepare_enable(fsm->clk);
-	if (ret) {
-		dev_err(fsm->dev, "Failed to enable EMI clock.\n");
-		return ret;
-	}
-
 	mutex_init(&fsm->lock);
 
 	ret = stfsm_init(fsm);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to initialise FSM Controller\n");
-		goto err_clk_unprepare;
+		return ret;
 	}
 
 	stfsm_fetch_platform_configs(pdev);
 
 	/* Detect SPI FLASH device */
 	info = stfsm_jedec_probe(fsm);
-	if (!info) {
-		ret = -ENODEV;
-		goto err_clk_unprepare;
-	}
+	if (!info)
+		return -ENODEV;
 	fsm->info = info;
 
 	/* Use device size to determine address width */
@@ -2089,7 +2081,7 @@ static int stfsm_probe(struct platform_device *pdev)
 	else
 		ret = stfsm_prepare_rwe_seqs_default(fsm);
 	if (ret)
-		goto err_clk_unprepare;
+		return ret;
 
 	fsm->mtd.name		= info->name;
 	fsm->mtd.dev.parent	= &pdev->dev;
@@ -2112,13 +2104,7 @@ static int stfsm_probe(struct platform_device *pdev)
 		(long long)fsm->mtd.size, (long long)(fsm->mtd.size >> 20),
 		fsm->mtd.erasesize, (fsm->mtd.erasesize >> 10));
 
-	ret = mtd_device_register(&fsm->mtd, NULL, 0);
-	if (ret) {
-err_clk_unprepare:
-		clk_disable_unprepare(fsm->clk);
-	}
-
-	return ret;
+	return mtd_device_register(&fsm->mtd, NULL, 0);
 }
 
 static int stfsm_remove(struct platform_device *pdev)
@@ -2127,8 +2113,6 @@ static int stfsm_remove(struct platform_device *pdev)
 
 	WARN_ON(mtd_device_unregister(&fsm->mtd));
 
-	clk_disable_unprepare(fsm->clk);
-
 	return 0;
 }