From 034df49fd946df12fb555d184a113385cb72944a Mon Sep 17 00:00:00 2001 From: Balaji Rao Date: Thu, 29 Jan 2009 15:00:37 +0000 Subject: pcf50633_charging_current_control.patch Introduces battery charging current control. Signed-off-by: Balaji Rao --- drivers/power/pcf50633-charger.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'drivers/power') 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, }; -- cgit v1.2.3