[PATCH -next 04/11] mtd: rawnand: intel: Use helper function devm_clk_get_enabled()

[Li Zetao]

After the commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for
prepared and enabled clocks"), it can replace the pair of functions,
devm_clk_get() and clk_prepare_enable() with a single helper function
devm_clk_get_enabled(). Moreover, the driver will keeps a clock prepared
(or enabled) during the whole lifetime of the driver, it is unnecessary to
unprepare and disable clock explicitly when remove driver or in the error
handling path.

Signed-off-by: Li Zetao <lizetao1 at huawei.com>
---
 drivers/mtd/nand/raw/intel-nand-controller.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/mtd/nand/raw/intel-nand-controller.c b/drivers/mtd/nand/raw/intel-nand-controller.c
index a9909eb08124..cb5d88f42297 100644
--- a/drivers/mtd/nand/raw/intel-nand-controller.c
+++ b/drivers/mtd/nand/raw/intel-nand-controller.c
@@ -626,16 +626,10 @@ 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;
 	}
 
@@ -643,7 +637,7 @@ static int ebu_nand_probe(struct platform_device *pdev)
 	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[] = {
-- 
2.34.1