diff options
| author | Balaji Rao <balajirrao@openmoko.org> | 2009-01-29 15:00:37 +0000 |
|---|---|---|
| committer | Andy Green <agreen@octopus.localdomain> | 2009-01-29 15:00:37 +0000 |
| commit | 034df49fd946df12fb555d184a113385cb72944a (patch) | |
| tree | 53bc87a6a11ae4535493e244b24b8843aabb5d5a /drivers/power | |
| parent | 31d84c5ce35769f94c9c981c6c6738acb7b473da (diff) | |
pcf50633_charging_current_control.patch
Introduces battery charging current control.
Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/pcf50633-charger.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c index 1efd7987517..874caf6033f 100644 --- a/drivers/power/pcf50633-charger.c +++ b/drivers/power/pcf50633-charger.c @@ -156,9 +156,42 @@ static ssize_t set_usblim(struct device *dev, static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim); +static ssize_t +show_chglim(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct pcf50633_mbc *mbc = dev_get_drvdata(dev); + u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5); + unsigned int ma; + + ma = (mbc->pcf->pdata->chg_ref_current_ma * mbcc5) >> 8; + + return sprintf(buf, "%u\n", ma); +} + +static ssize_t set_chglim(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct pcf50633_mbc *mbc = dev_get_drvdata(dev); + unsigned long ma; + u8 mbcc5; + int ret; + + ret = strict_strtoul(buf, 10, &ma); + if (ret) + return -EINVAL; + + mbcc5 = (ma << 8) / mbc->pcf->pdata->chg_ref_current_ma; + pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5); + + return count; +} + +static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim); + static struct attribute *pcf50633_mbc_sysfs_entries[] = { &dev_attr_chgmode.attr, &dev_attr_usb_curlim.attr, + &dev_attr_chg_curlim.attr, NULL, }; |