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linux-stable/drivers/power/supply/pcf50633-charger.c
Uwe Kleine-König 83bce34420 power: Switch back to struct platform_driver::remove() 
After commit 0edb555a65 ("platform: Make platform_driver::remove()
return void") .remove() is (again) the right callback to implement for
platform drivers.

Convert all platform drivers below drivers/power/ to use .remove(), with
the eventual goal to drop struct platform_driver::remove_new(). As
.remove() and .remove_new() have the same prototypes, conversion is done
by just changing the structure member name in the driver initializer.

While touching these files, make indention of the struct initializer
consistent in several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/20241010203622.839625-6-u.kleine-koenig@baylibre.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2024-10-21 15:51:42 +02:00

467 lines
12 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/* 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
*/
#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;
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;
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 sysfs_emit(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 sysfs_emit(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 = kstrtoul(buf, 10, &ma);
if (ret)
return ret;
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 sysfs_emit(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 = kstrtoul(buf, 10, &ma);
if (ret)
return ret;
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_attrs[] = {
&dev_attr_chgmode.attr,
&dev_attr_usb_curlim.attr,
&dev_attr_chg_curlim.attr,
NULL,
};
ATTRIBUTE_GROUPS(pcf50633_mbc_sysfs);
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 = power_supply_get_drvdata(psy);
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 = power_supply_get_drvdata(psy);
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 = power_supply_get_drvdata(psy);
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 const struct power_supply_desc pcf50633_mbc_adapter_desc = {
.name = "adapter",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = power_props,
.num_properties = ARRAY_SIZE(power_props),
.get_property = &adapter_get_property,
};
static const struct power_supply_desc pcf50633_mbc_usb_desc = {
.name = "usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = power_props,
.num_properties = ARRAY_SIZE(power_props),
.get_property = usb_get_property,
};
static const struct power_supply_desc pcf50633_mbc_ac_desc = {
.name = "ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = power_props,
.num_properties = ARRAY_SIZE(power_props),
.get_property = ac_get_property,
};
static int pcf50633_mbc_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
struct power_supply_config usb_psy_cfg;
struct pcf50633_mbc *mbc;
int i;
u8 mbcs1;
mbc = devm_kzalloc(&pdev->dev, 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);
psy_cfg.supplied_to = mbc->pcf->pdata->batteries;
psy_cfg.num_supplicants = mbc->pcf->pdata->num_batteries;
psy_cfg.drv_data = mbc;
/* Create power supplies */
mbc->adapter = devm_power_supply_register(&pdev->dev,
&pcf50633_mbc_adapter_desc,
&psy_cfg);
if (IS_ERR(mbc->adapter)) {
dev_err(mbc->pcf->dev, "failed to register adapter\n");
return PTR_ERR(mbc->adapter);
}
usb_psy_cfg = psy_cfg;
usb_psy_cfg.attr_grp = pcf50633_mbc_sysfs_groups;
mbc->usb = devm_power_supply_register(&pdev->dev,
&pcf50633_mbc_usb_desc,
&usb_psy_cfg);
if (IS_ERR(mbc->usb)) {
dev_err(mbc->pcf->dev, "failed to register usb\n");
return PTR_ERR(mbc->usb);
}
mbc->ac = devm_power_supply_register(&pdev->dev,
&pcf50633_mbc_ac_desc,
&psy_cfg);
if (IS_ERR(mbc->ac)) {
dev_err(mbc->pcf->dev, "failed to register ac\n");
return PTR_ERR(mbc->ac);
}
mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
if (mbcs1 & PCF50633_MBCS1_USBPRES)
pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
return 0;
}
static void pcf50633_mbc_remove(struct platform_device *pdev)
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
int i;
/* Remove IRQ handlers */
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
}
static struct platform_driver pcf50633_mbc_driver = {
.driver = {
.name = "pcf50633-mbc",
},
.probe = pcf50633_mbc_probe,
.remove = pcf50633_mbc_remove,
};
module_platform_driver(pcf50633_mbc_driver);
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50633 mbc driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-mbc");
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