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mfd: ab8500-gpadc: Complain if we fail to enable vtvout LDO 

Since commit c8801a8e
"regulator: core: Mark all get and enable calls as __must_check",
we must check return value of regulator_enable() to silence below build warning.

  CC      drivers/mfd/ab8500-gpadc.o
drivers/mfd/ab8500-gpadc.c: In function 'ab8500_gpadc_runtime_resume':
drivers/mfd/ab8500-gpadc.c:598:18: warning: ignoring return value of 'regulator_enable', declared with attribute warn_unused_result [-Wunused-result]
drivers/mfd/ab8500-gpadc.c: In function 'ab8500_gpadc_probe':
drivers/mfd/ab8500-gpadc.c:655:18: warning: ignoring return value of 'regulator_enable', declared with attribute warn_unused_result [-Wunused-result]

Also convert to devm_regulator_get(), this fixes a missing regulator_put() call
in ab8500_gpadc_remove().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Axel Lin 2013-03-09 17:46:45 +08:00 committed by Samuel Ortiz
parent fd860195a4
commit 54fc4037ac
1 changed files with 13 additions and 4 deletions
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17
drivers/mfd/ab8500-gpadc.c
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@ -594,9 +594,12 @@ static int ab8500_gpadc_runtime_suspend(struct device *dev)
static int ab8500_gpadc_runtime_resume(struct device *dev)
{
struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
int ret;
regulator_enable(gpadc->regu);
return 0;
ret = regulator_enable(gpadc->regu);
if (ret)
dev_err(dev, "Failed to enable vtvout LDO: %d\n", ret);
return ret;
}
static int ab8500_gpadc_runtime_idle(struct device *dev)
@ -643,7 +646,7 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
}
/* VTVout LDO used to power up ab8500-GPADC */
gpadc->regu = regulator_get(&pdev->dev, "vddadc");
gpadc->regu = devm_regulator_get(&pdev->dev, "vddadc");
if (IS_ERR(gpadc->regu)) {
ret = PTR_ERR(gpadc->regu);
dev_err(gpadc->dev, "failed to get vtvout LDO\n");
@ -652,7 +655,11 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, gpadc);
regulator_enable(gpadc->regu);
ret = regulator_enable(gpadc->regu);
if (ret) {
dev_err(gpadc->dev, "Failed to enable vtvout LDO: %d\n", ret);
goto fail_enable;
}
pm_runtime_set_autosuspend_delay(gpadc->dev, GPADC_AUDOSUSPEND_DELAY);
pm_runtime_use_autosuspend(gpadc->dev);
@ -663,6 +670,8 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
list_add_tail(&gpadc->node, &ab8500_gpadc_list);
dev_dbg(gpadc->dev, "probe success\n");
return 0;
fail_enable:
fail_irq:
free_irq(gpadc->irq, gpadc);
fail: