[PATCH 01/17] spi: axiado: Use helper function devm_clk_get_enabled()

[Pei Xiao]

devm_clk_get() and clk_prepare_enable() can now be replaced by
devm_clk_get_enabled() when driver enables the clocks. Moreover, it is no
longer necessary to unprepare and disable the clocks explicitly.
Simplify code.

Signed-off-by: Pei Xiao <xiaopei01 at kylinos.cn>
---
 drivers/spi/spi-axiado.c | 23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/drivers/spi/spi-axiado.c b/drivers/spi/spi-axiado.c
index 8cea81432c5b..4ba8f0e6909f 100644
--- a/drivers/spi/spi-axiado.c
+++ b/drivers/spi/spi-axiado.c
@@ -770,32 +770,20 @@ static int ax_spi_probe(struct platform_device *pdev)
 		goto remove_ctlr;
 	}
 
-	xspi->pclk = devm_clk_get(&pdev->dev, "pclk");
+	xspi->pclk = devm_clk_get_enabled(&pdev->dev, "pclk");
 	if (IS_ERR(xspi->pclk)) {
-		dev_err(&pdev->dev, "pclk clock not found.\n");
+		dev_err(&pdev->dev, "Unable to enable APB clock.\n");
 		ret = PTR_ERR(xspi->pclk);
 		goto remove_ctlr;
 	}
 
-	xspi->ref_clk = devm_clk_get(&pdev->dev, "ref");
+	xspi->ref_clk = devm_clk_get_enabled(&pdev->dev, "ref");
 	if (IS_ERR(xspi->ref_clk)) {
-		dev_err(&pdev->dev, "ref clock not found.\n");
+		dev_err(&pdev->dev, "Unable to enable device clock.\n");
 		ret = PTR_ERR(xspi->ref_clk);
 		goto remove_ctlr;
 	}
 
-	ret = clk_prepare_enable(xspi->pclk);
-	if (ret) {
-		dev_err(&pdev->dev, "Unable to enable APB clock.\n");
-		goto remove_ctlr;
-	}
-
-	ret = clk_prepare_enable(xspi->ref_clk);
-	if (ret) {
-		dev_err(&pdev->dev, "Unable to enable device clock.\n");
-		goto clk_dis_apb;
-	}
-
 	pm_runtime_use_autosuspend(&pdev->dev);
 	pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
 	pm_runtime_get_noresume(&pdev->dev);
@@ -866,9 +854,6 @@ static int ax_spi_probe(struct platform_device *pdev)
 clk_dis_all:
 	pm_runtime_set_suspended(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	clk_disable_unprepare(xspi->ref_clk);
-clk_dis_apb:
-	clk_disable_unprepare(xspi->pclk);
 remove_ctlr:
 	spi_controller_put(ctlr);
 	return ret;
-- 
2.25.1