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authorAxel Lin <axel.lin@gmail.com>2012-07-11 05:27:54 +0400
committerSamuel Ortiz <sameo@linux.intel.com>2012-07-16 17:26:37 +0400
commit46b65a8fe63ece3b01d7d0c5e3bb5b9f478c44d5 (patch)
tree5e79493ab517ea4ac97fe0ec9351d8e5dcffd250 /drivers/mfd/88pm800.c
parente102befe7a254f7b827fecc19eba0c5af03d1bf3 (diff)
downloadlinux-46b65a8fe63ece3b01d7d0c5e3bb5b9f478c44d5.tar.xz
mfd: Fix checking return value of 88pm8xx regmap_read()
Check the return value of regmap_read() rather than the read value. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/88pm800.c')
-rw-r--r--drivers/mfd/88pm800.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index ec7d9b8c7844..b67a3018b136 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -419,22 +419,24 @@ static int __devinit device_800_init(struct pm80x_chip *chip,
struct pm80x_platform_data *pdata)
{
int ret, pmic_id;
+ unsigned int val;
- regmap_read(chip->regmap, PM800_CHIP_ID, &ret);
+ ret = regmap_read(chip->regmap, PM800_CHIP_ID, &val);
if (ret < 0) {
dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
goto out;
}
- pmic_id = ret & PM80X_VERSION_MASK;
+ pmic_id = val & PM80X_VERSION_MASK;
if ((pmic_id >= PM800_CHIP_A0) && (pmic_id <= PM800_CHIP_END)) {
- chip->version = ret;
+ chip->version = val;
dev_info(chip->dev,
- "88PM80x:Marvell 88PM800 (ID:0x%x) detected\n", ret);
+ "88PM80x:Marvell 88PM800 (ID:0x%x) detected\n", val);
} else {
dev_err(chip->dev,
- "Failed to detect Marvell 88PM800:ChipID[0x%x]\n", ret);
+ "Failed to detect Marvell 88PM800:ChipID[0x%x]\n", val);
+ ret = -EINVAL;
goto out;
}
@@ -442,12 +444,12 @@ static int __devinit device_800_init(struct pm80x_chip *chip,
* alarm wake up bit will be clear in device_irq_init(),
* read before that
*/
- regmap_read(chip->regmap, PM800_RTC_CONTROL, &ret);
+ ret = regmap_read(chip->regmap, PM800_RTC_CONTROL, &val);
if (ret < 0) {
dev_err(chip->dev, "Failed to read RTC register: %d\n", ret);
goto out;
}
- if (ret & PM800_ALARM_WAKEUP) {
+ if (val & PM800_ALARM_WAKEUP) {
if (pdata && pdata->rtc)
pdata->rtc->rtc_wakeup = 1;
}