path: root/drivers/mfd
diff options
authorAxel Lin <axel.lin@ingics.com>2013-03-09 17:46:45 +0800
committerSamuel Ortiz <sameo@linux.intel.com>2013-03-12 09:34:39 +0100
commit54fc4037ac449acf96ab88c3e65633c997df8a84 (patch)
treeff0b6d1bbc7d1f88a2f33cf9909f392ba32b0a93 /drivers/mfd
parentfd860195a4f9d661754345bd06a3adb30d12d882 (diff)
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>
Diffstat (limited to 'drivers/mfd')
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index b1f3561b023..5f341a50ee5 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -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);
@@ -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;
free_irq(gpadc->irq, gpadc);