lkml.org 
[lkml]   [2012]   [Aug]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/13] drivers/staging/iio/adc/spear_adc.c: use clk_prepare_enable and clk_disable_unprepare
Date
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/staging/iio/adc/spear_adc.c | 25 ++++++++-----------------
1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/iio/adc/spear_adc.c b/drivers/staging/iio/adc/spear_adc.c
index 675c427..0b83e2e 100644
--- a/drivers/staging/iio/adc/spear_adc.c
+++ b/drivers/staging/iio/adc/spear_adc.c
@@ -330,36 +330,30 @@ static int __devinit spear_adc_probe(struct platform_device *pdev)
goto errout3;
}

- ret = clk_prepare(info->clk);
- if (ret) {
- dev_err(dev, "failed preparing clock\n");
- goto errout4;
- }
-
- ret = clk_enable(info->clk);
+ ret = clk_prepare_enable(info->clk);
if (ret) {
dev_err(dev, "failed enabling clock\n");
- goto errout5;
+ goto errout4;
}

irq = platform_get_irq(pdev, 0);
if ((irq < 0) || (irq >= NR_IRQS)) {
dev_err(dev, "failed getting interrupt resource\n");
ret = -EINVAL;
- goto errout6;
+ goto errout5;
}

ret = devm_request_irq(dev, irq, spear_adc_isr, 0, MOD_NAME, info);
if (ret < 0) {
dev_err(dev, "failed requesting interrupt\n");
- goto errout6;
+ goto errout5;
}

if (of_property_read_u32(np, "sampling-frequency",
&info->sampling_freq)) {
dev_err(dev, "sampling-frequency missing in DT\n");
ret = -EINVAL;
- goto errout6;
+ goto errout5;
}

/*
@@ -389,16 +383,14 @@ static int __devinit spear_adc_probe(struct platform_device *pdev)

ret = iio_device_register(iodev);
if (ret)
- goto errout6;
+ goto errout5;

dev_info(dev, "SPEAR ADC driver loaded, IRQ %d\n", irq);

return 0;

-errout6:
- clk_disable(info->clk);
errout5:
- clk_unprepare(info->clk);
+ clk_disable_unprepare(info->clk);
errout4:
clk_put(info->clk);
errout3:
@@ -416,8 +408,7 @@ static int __devexit spear_adc_remove(struct platform_device *pdev)

iio_device_unregister(iodev);
platform_set_drvdata(pdev, NULL);
- clk_disable(info->clk);
- clk_unprepare(info->clk);
+ clk_disable_unprepare(info->clk);
clk_put(info->clk);
iounmap(info->adc_base_spear6xx);
iio_device_free(iodev);


\
 
 \ /
  Last update: 2012-08-26 19:01    [W:0.169 / U:0.616 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site