Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 2/13] drivers/spi/spi-{orion,pl022}.c: use clk_prepare_enable and clk_disable_unprepare | Date | Sun, 26 Aug 2012 18:00:54 +0200 |
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From: Julia Lawall <Julia.Lawall@lip6.fr>
Clk_prepare_enable and clk_disable_unprepare combine clk_prepare and clk_enable, and clk_disable and clk_unprepare. They make the code more concise, and ensure that clk_unprepare is called when clk_enable fails.
A simplified version of the semantic patch that introduces calls to these functions is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @@ expression e; @@
- clk_prepare(e); - clk_enable(e); + clk_prepare_enable(e);
@@ expression e; @@
- clk_disable(e); - clk_unprepare(e); + clk_disable_unprepare(e); // </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
--- drivers/spi/spi-orion.c | 3 +-- drivers/spi/spi-pl022.c | 17 ++++------------- 2 files changed, 5 insertions(+), 15 deletions(-)
diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c index b17c09c..b2a7199 100644 --- a/drivers/spi/spi-orion.c +++ b/drivers/spi/spi-orion.c @@ -416,8 +416,7 @@ static int __init orion_spi_probe(struct platform_device *pdev) goto out; } - clk_prepare(spi->clk); - clk_enable(spi->clk); + clk_prepare_enable(spi->clk); tclk_hz = clk_get_rate(spi->clk); spi->max_speed = DIV_ROUND_UP(tclk_hz, 4); spi->min_speed = DIV_ROUND_UP(tclk_hz, 30); diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c index b0fec03..0d235d4 100644 --- a/drivers/spi/spi-pl022.c +++ b/drivers/spi/spi-pl022.c @@ -2142,16 +2142,10 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) goto err_no_clk; } - status = clk_prepare(pl022->clk); - if (status) { - dev_err(&adev->dev, "could not prepare SSP/SPI bus clock\n"); - goto err_clk_prep; - } - - status = clk_enable(pl022->clk); + status = clk_prepare_enable(pl022->clk); if (status) { dev_err(&adev->dev, "could not enable SSP/SPI bus clock\n"); - goto err_no_clk_en; + goto err_clk_prep; } /* Initialize transfer pump */ @@ -2207,9 +2201,7 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) free_irq(adev->irq[0], pl022); err_no_irq: - clk_disable(pl022->clk); - err_no_clk_en: - clk_unprepare(pl022->clk); + clk_disable_unprepare(pl022->clk); err_clk_prep: clk_put(pl022->clk); err_no_clk: @@ -2243,8 +2235,7 @@ pl022_remove(struct amba_device *adev) pl022_dma_remove(pl022); free_irq(adev->irq[0], pl022); - clk_disable(pl022->clk); - clk_unprepare(pl022->clk); + clk_disable_unprepare(pl022->clk); clk_put(pl022->clk); pm_runtime_disable(&adev->dev); iounmap(pl022->virtbase);
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