mtd: rawnand: intel: 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 "err_disable_unprepare_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/20230821031737.1973183-5-lizetao1@huawei.com

Author: Li Zetao

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

@@ -626,24 +626,18 @@ static int ebu_nand_probe(struct platform_device *pdev)
 		goto err_of_node_put;
 	}
 
-	ebu_host->clk = devm_clk_get(dev, NULL);
+	ebu_host->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(ebu_host->clk)) {
 		ret = dev_err_probe(dev, PTR_ERR(ebu_host->clk),
-				    "failed to get clock\n");
-		goto err_of_node_put;
-	}
-
-	ret = clk_prepare_enable(ebu_host->clk);
-	if (ret) {
-		dev_err(dev, "failed to enable clock: %d\n", ret);
+				    "failed to get and enable clock\n");
 		goto err_of_node_put;
 	}
 
 	ebu_host->dma_tx = dma_request_chan(dev, "tx");
 	if (IS_ERR(ebu_host->dma_tx)) {
 		ret = dev_err_probe(dev, PTR_ERR(ebu_host->dma_tx),
 				    "failed to request DMA tx chan!.\n");
-		goto err_disable_unprepare_clk;
+		goto err_of_node_put;
 	}
 
 	ebu_host->dma_rx = dma_request_chan(dev, "rx");
@@ -698,8 +692,6 @@ static int ebu_nand_probe(struct platform_device *pdev)
 	nand_cleanup(&ebu_host->chip);
 err_cleanup_dma:
 	ebu_dma_cleanup(ebu_host);
-err_disable_unprepare_clk:
-	clk_disable_unprepare(ebu_host->clk);
 err_of_node_put:
 	of_node_put(chip_np);
 
@@ -716,7 +708,6 @@ static void ebu_nand_remove(struct platform_device *pdev)
 	nand_cleanup(&ebu_host->chip);
 	ebu_nand_disable(&ebu_host->chip);
 	ebu_dma_cleanup(ebu_host);
-	clk_disable_unprepare(ebu_host->clk);
 }
 
 static const struct of_device_id ebu_nand_match[] = {