[PATCH -next v2 05/25] spi: spi-axi-spi-engine: Use helper function devm_clk_get_enabled()

[Li Zetao]

Since commit 7ef9651e9792 ("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.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron at huawei.com>
Signed-off-by: Li Zetao <lizetao1 at huawei.com>
---
v1 -> v2: None

 drivers/spi/spi-axi-spi-engine.c | 25 +++++--------------------
 1 file changed, 5 insertions(+), 20 deletions(-)

diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c
index 0258c9a72fdc..b96e55f59d1a 100644
--- a/drivers/spi/spi-axi-spi-engine.c
+++ b/drivers/spi/spi-axi-spi-engine.c
@@ -485,30 +485,22 @@ static int spi_engine_probe(struct platform_device *pdev)
 
 	spin_lock_init(&spi_engine->lock);
 
-	spi_engine->clk = devm_clk_get(&pdev->dev, "s_axi_aclk");
+	spi_engine->clk = devm_clk_get_enabled(&pdev->dev, "s_axi_aclk");
 	if (IS_ERR(spi_engine->clk)) {
 		ret = PTR_ERR(spi_engine->clk);
 		goto err_put_host;
 	}
 
-	spi_engine->ref_clk = devm_clk_get(&pdev->dev, "spi_clk");
+	spi_engine->ref_clk = devm_clk_get_enabled(&pdev->dev, "spi_clk");
 	if (IS_ERR(spi_engine->ref_clk)) {
 		ret = PTR_ERR(spi_engine->ref_clk);
 		goto err_put_host;
 	}
 
-	ret = clk_prepare_enable(spi_engine->clk);
-	if (ret)
-		goto err_put_host;
-
-	ret = clk_prepare_enable(spi_engine->ref_clk);
-	if (ret)
-		goto err_clk_disable;
-
 	spi_engine->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(spi_engine->base)) {
 		ret = PTR_ERR(spi_engine->base);
-		goto err_ref_clk_disable;
+		goto err_put_host;
 	}
 
 	version = readl(spi_engine->base + SPI_ENGINE_REG_VERSION);
@@ -518,7 +510,7 @@ static int spi_engine_probe(struct platform_device *pdev)
 			SPI_ENGINE_VERSION_MINOR(version),
 			SPI_ENGINE_VERSION_PATCH(version));
 		ret = -ENODEV;
-		goto err_ref_clk_disable;
+		goto err_put_host;
 	}
 
 	writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_RESET);
@@ -527,7 +519,7 @@ static int spi_engine_probe(struct platform_device *pdev)
 
 	ret = request_irq(irq, spi_engine_irq, 0, pdev->name, host);
 	if (ret)
-		goto err_ref_clk_disable;
+		goto err_put_host;
 
 	host->dev.of_node = pdev->dev.of_node;
 	host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_3WIRE;
@@ -545,10 +537,6 @@ static int spi_engine_probe(struct platform_device *pdev)
 	return 0;
 err_free_irq:
 	free_irq(irq, host);
-err_ref_clk_disable:
-	clk_disable_unprepare(spi_engine->ref_clk);
-err_clk_disable:
-	clk_disable_unprepare(spi_engine->clk);
 err_put_host:
 	spi_controller_put(host);
 	return ret;
@@ -569,9 +557,6 @@ static void spi_engine_remove(struct platform_device *pdev)
 	writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING);
 	writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE);
 	writel_relaxed(0x01, spi_engine->base + SPI_ENGINE_REG_RESET);
-
-	clk_disable_unprepare(spi_engine->ref_clk);
-	clk_disable_unprepare(spi_engine->clk);
 }
 
 static const struct of_device_id spi_engine_match_table[] = {
-- 
2.34.1