[PATCH 12/17] spi: stm32-qspi: 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-stm32-qspi.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index df1bbacec90a..9ff9975edef4 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -819,25 +819,19 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 
 	init_completion(&qspi->match_completion);
 
-	qspi->clk = devm_clk_get(dev, NULL);
+	qspi->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(qspi->clk))
-		return PTR_ERR(qspi->clk);
-
+		return dev_err_probe(dev, PTR_ERR(qspi->clk),
+				     "can not enable the clock\n");
 	qspi->clk_rate = clk_get_rate(qspi->clk);
 	if (!qspi->clk_rate)
 		return -EINVAL;
 
-	ret = clk_prepare_enable(qspi->clk);
-	if (ret) {
-		dev_err(dev, "can not enable the clock\n");
-		return ret;
-	}
-
 	rstc = devm_reset_control_get_exclusive(dev, NULL);
 	if (IS_ERR(rstc)) {
 		ret = PTR_ERR(rstc);
 		if (ret == -EPROBE_DEFER)
-			goto err_clk_disable;
+			goto err_defer;
 	} else {
 		reset_control_assert(rstc);
 		udelay(2);
@@ -886,8 +880,7 @@ static int stm32_qspi_probe(struct platform_device *pdev)
 	pm_runtime_dont_use_autosuspend(qspi->dev);
 err_dma_free:
 	stm32_qspi_dma_free(qspi);
-err_clk_disable:
-	clk_disable_unprepare(qspi->clk);
+err_defer:
 
 	return ret;
 }
-- 
2.25.1