litmus-rt.git - The LITMUS^RT kernel.

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author	Guenter Roeck <linux@roeck-us.net>	2012-01-20 00:49:20 -0500
committer	Guenter Roeck <guenter.roeck@ericsson.com>	2012-03-18 21:27:29 -0400
commit	2185696d7d8a852146f6a901b35e9b94be43329a (patch)
tree	b3f75fc6188622e689ef3e7507cc485e9b9ddcdf /drivers/rtc/rtc-rx8581.c
parent	b162c033480a7ba0433d329f56c142a0ab59049d (diff)

hwmon: (vt1211) Fix: do not use assignment in if condition

Fix checkpatch issue: ERROR: do not use assignment in if condition Replace repeated calls to device_create_file() with calls to sysfs_create_group. Cc: Juerg Haefliger <juergh@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Diffstat (limited to 'drivers/rtc/rtc-rx8581.c')

0 files changed, 0 insertions, 0 deletions

/* NXP PCF50633 Main Battery Charger Driver * * (C) 2006-2008 by Openmoko, Inc. * Author: Balaji Rao <balajirrao@openmoko.org> * All rights reserved. * * Broken down from monstrous PCF50633 driver mainly by * Harald Welte, Andy Green and Werner Almesberger * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/types.h> #include <linux/device.h> #include <linux/sysfs.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/mfd/pcf50633/core.h> #include <linux/mfd/pcf50633/mbc.h> struct pcf50633_mbc { struct pcf50633 *pcf; int adapter_online; int usb_online; struct power_supply usb; struct power_supply adapter; struct power_supply ac; }; int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma) { struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev); int ret = 0; u8 bits; int charging_start = 1; u8 mbcs2, chgmod; unsigned int mbcc5; if (ma >= 1000) { bits = PCF50633_MBCC7_USB_1000mA; ma = 1000; } else if (ma >= 500) { bits = PCF50633_MBCC7_USB_500mA; ma = 500; } else if (ma >= 100) { bits = PCF50633_MBCC7_USB_100mA; ma = 100; } else { bits = PCF50633_MBCC7_USB_SUSPEND; charging_start = 0; ma = 0; } ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7, PCF50633_MBCC7_USB_MASK, bits); if (ret) dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma); else dev_info(pcf->dev, "usb curlim to %d mA\n", ma); /* * We limit the charging current to be the USB current limit. * The reason is that on pcf50633, when it enters PMU Standby mode, * which it does when the device goes "off", the USB current limit * reverts to the variant default. In at least one common case, that * default is 500mA. By setting the charging current to be the same * as the USB limit we set here before PMU standby, we enforce it only * using the correct amount of current even when the USB current limit * gets reset to the wrong thing */ if (mbc->pcf->pdata->charger_reference_current_ma) { mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma; if (mbcc5 > 255) mbcc5 = 255; pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5); } mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2); chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK); /* If chgmod == BATFULL, setting chgena has no effect. * Datasheet says we need to set resume instead but when autoresume is * used resume doesn't work. Clear and set chgena instead. */ if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL) pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA); else { pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA); pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1, PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA); } power_supply_changed(&mbc->usb); return ret; } EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set); int pcf50633_mbc_get_status(struct pcf50633 *pcf) { struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev); int status = 0; u8 chgmod; if (!mbc) return 0; chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2) & PCF50633_MBCS2_MBC_MASK; if (mbc->usb_online) status |= PCF50633_MBC_USB_ONLINE; if (chgmod == PCF50633_MBCS2_MBC_USB_PRE || chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT || chgmod == PCF50633_MBCS2_MBC_USB_FAST || chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT) status |= PCF50633_MBC_USB_ACTIVE; if (mbc->adapter_online) status |= PCF50633_MBC_ADAPTER_ONLINE; if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE || chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT || chgmod == PCF50633_MBCS2_MBC_ADP_FAST || chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT) status |= PCF50633_MBC_ADAPTER_ACTIVE; return status; } EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status); int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf) { struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev); if (!mbc) return 0; return mbc->usb_online; } EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status); static ssize_t show_chgmode(struct device *dev, struct device_attribute *attr, char *buf) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2); u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK); return sprintf(buf, "%d\n", chgmod); } static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL); static ssize_t show_usblim(struct device *dev, struct device_attribute *attr, char *buf) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) & PCF50633_MBCC7_USB_MASK; unsigned int ma; if (usblim == PCF50633_MBCC7_USB_1000mA) ma = 1000; else if (usblim == PCF50633_MBCC7_USB_500mA) ma = 500; else if (usblim == PCF50633_MBCC7_USB_100mA) ma = 100; else ma = 0; return sprintf(buf, "%u\n", ma); } static ssize_t set_usblim(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct pcf50633_mbc *mbc = dev_get_drvdata(dev); unsigned long ma; int ret; ret = strict_strtoul(buf, 10, &ma); if (ret) return -EINVAL; pcf50633_mbc_usb_curlim_set(mbc->pcf, ma); return count; } 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; if (!mbc->pcf->pdata->charger_reference_current_ma) return -ENODEV; ma = (mbc->pcf->pdata->charger_reference_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; unsigned int mbcc5; int ret; if (!mbc->pcf->pdata->charger_reference_current_ma) return -ENODEV; ret = strict_strtoul(buf, 10, &ma); if (ret) return -EINVAL; mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma; if (mbcc5 > 255) mbcc5 = 255; pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5); return count; } /* * This attribute allows to change MBC charging limit on the fly * independently of usb current limit. It also gets set automatically every * time usb current limit is changed. */ 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, }; static struct attribute_group mbc_attr_group = { .name = NULL, /* put in device directory */ .attrs = pcf50633_mbc_sysfs_entries, }; static void pcf50633_mbc_irq_handler(int irq, void *data) { struct pcf50633_mbc *mbc = data; /* USB */ if (irq == PCF50633_IRQ_USBINS) { mbc->usb_online = 1; } else if (irq == PCF50633_IRQ_USBREM) { mbc->usb_online = 0; pcf50633_mbc_usb_curlim_set(mbc->pcf, 0); } /* Adapter */ if (irq == PCF50633_IRQ_ADPINS) mbc->adapter_online = 1; else if (irq == PCF50633_IRQ_ADPREM) mbc->adapter_online = 0; power_supply_changed(&mbc->ac); power_supply_changed(&mbc->usb); power_supply_changed(&mbc->adapter); if (mbc->pcf->pdata->mbc_event_callback) mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq); } static int adapter_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, adapter); int ret = 0; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = mbc->adapter_online; break; default: ret = -EINVAL; break; } return ret; } static int usb_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb); int ret = 0; u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) & PCF50633_MBCC7_USB_MASK; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = mbc->usb_online && (usblim <= PCF50633_MBCC7_USB_500mA); break; default: ret = -EINVAL; break; } return ret; } static int ac_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, ac); int ret = 0; u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) & PCF50633_MBCC7_USB_MASK; switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = mbc->usb_online && (usblim == PCF50633_MBCC7_USB_1000mA); break; default: ret = -EINVAL; break; } return ret; } static enum power_supply_property power_props[] = { POWER_SUPPLY_PROP_ONLINE, }; static const u8 mbc_irq_handlers[] = { PCF50633_IRQ_ADPINS, PCF50633_IRQ_ADPREM, PCF50633_IRQ_USBINS, PCF50633_IRQ_USBREM, PCF50633_IRQ_BATFULL, PCF50633_IRQ_CHGHALT, PCF50633_IRQ_THLIMON, PCF50633_IRQ_THLIMOFF, PCF50633_IRQ_USBLIMON, PCF50633_IRQ_USBLIMOFF, PCF50633_IRQ_LOWSYS, PCF50633_IRQ_LOWBAT, }; static int __devinit pcf50633_mbc_probe(struct platform_device *pdev) { struct pcf50633_mbc *mbc; int ret; int i; u8 mbcs1; mbc = kzalloc(sizeof(*mbc), GFP_KERNEL); if (!mbc) return -ENOMEM; platform_set_drvdata(pdev, mbc); mbc->pcf = dev_to_pcf50633(pdev->dev.parent); /* Set up IRQ handlers */ for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++) pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i], pcf50633_mbc_irq_handler, mbc); /* Create power supplies */ mbc->adapter.name = "adapter"; mbc->adapter.type = POWER_SUPPLY_TYPE_MAINS; mbc->adapter.properties = power_props;


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