| Message ID | 20170102163723.7939-18-quentin.schulz@free-electrons.com |
|---|---|
| State | New |
| Headers | show |
On Mon, Jan 02, 2017 at 05:37:17PM +0100, Quentin Schulz wrote: > + /* > + * IIO framework gives mV but Power Supply framework gives µV. > + */ > + val->intval *= 1000; s/gives/wants/ ? > +static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt, > + int val) > +{ > + switch (val) { > + case 4100000: > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_VOLT, > + AXP20X_CHRG_CTRL1_TGT_4_1V); > + case 4150000: > + if (axp20x_batt->axp_id == AXP221_ID) > + return -EINVAL; > + > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_VOLT, > + AXP20X_CHRG_CTRL1_TGT_4_15V); > + case 4200000: > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_VOLT, > + AXP20X_CHRG_CTRL1_TGT_4_2V); > + default: > + /* > + * AXP20x max voltage can be set to 4.36V and AXP22X max voltage > + * can be set to 4.22V and 4.24V, but these voltages are too > + * high for Lithium based batteries (AXP PMICs are supposed to > + * be used with these kinds of battery). > + */ > + return -EINVAL; > + } Since all your calls to regmap are the same, something like: case 4100000: val = AXP20X_CHRG_CTRL1_TGT_4_1V; break; case 4150000: val = AXP20X_CHRG_CTRL1_TGT_4_15V; break; regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, AXP20X_CHRG_CTRL1_TGT_VOLT, val); It would also get rid of your warnings in checkpatch. Maxime
On 2 January 2017 at 13:37, Quentin Schulz <quentin.schulz@free-electrons.com> wrote: [...] > + > +#define AXP20X_PWR_STATUS_BAT_CHARGING BIT(2) > + > +#define AXP20X_PWR_OP_BATT_PRESENT BIT(5) > +#define AXP20X_PWR_OP_BATT_ACTIVATED BIT(3) > + > +#define AXP209_FG_PERCENT GENMASK(6, 0) > +#define AXP22X_FG_VALID BIT(7) > + > +#define AXP20X_CHRG_CTRL1_TGT_VOLT GENMASK(6, 5) > +#define AXP20X_CHRG_CTRL1_TGT_4_1V (0 << 5) > +#define AXP20X_CHRG_CTRL1_TGT_4_15V BIT(5) This is just a silly nit, but I would put (1 << 5) here for readability. > +#define AXP20X_CHRG_CTRL1_TGT_4_2V (2 << 5) > +#define AXP20X_CHRG_CTRL1_TGT_4_36V (3 << 5) > +#define AXP20X_CHRG_CTRL1_TGT_CURR GENMASK(3, 0) > + > +#define AXP22X_CHRG_CTRL1_TGT_4_22V BIT(5) Ditto. > +#define AXP22X_CHRG_CTRL1_TGT_4_24V (3 << 5) > + > +#define AXP20X_V_OFF_MASK GENMASK(2, 0) > + > +struct axp20x_batt_ps { > + struct regmap *regmap; > + struct power_supply *batt; > + struct axp20x_dev *axp20x; > + struct iio_channel *batt_chrg_i; > + struct iio_channel *batt_dischrg_i; > + struct iio_channel *batt_v; > + u8 axp_id; > +}; > + [..] > +static int axp20x_power_probe(struct platform_device *pdev) > +{ > + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); > + struct axp20x_batt_ps *axp20x_batt; > + struct power_supply_config psy_cfg = {}; > + To be consistent with the AC power supply and USB power supply, you might want to call of_device_is_available() here. Otherwise, the device probes even if "disabled" in the DTS. > + axp20x_batt = devm_kzalloc(&pdev->dev, sizeof(*axp20x_batt), > + GFP_KERNEL); > + if (!axp20x_batt) > + return -ENOMEM; > + Thanks for the good work,
Hi, On Thu, Jan 05, 2017 at 02:34:48PM -0300, Ezequiel Garcia wrote: > > +static int axp20x_power_probe(struct platform_device *pdev) > > +{ > > + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); > > + struct axp20x_batt_ps *axp20x_batt; > > + struct power_supply_config psy_cfg = {}; > > + > > To be consistent with the AC power supply and USB power supply, > you might want to call of_device_is_available() here. > Otherwise, the device probes even if "disabled" in the DTS. I would expect that check in the mfd code. Probe should not be called at all if the sub-device is disabled. -- Sebastian
Hi, On Tue, Jan 3, 2017 at 12:37 AM, Quentin Schulz <quentin.schulz@free-electrons.com> wrote: > The X-Powers AXP20X and AXP22X PMICs can have a battery as power supply. > > This patch adds the battery power supply driver to get various data from > the PMIC, such as the battery status (charging, discharging, full, > dead), current max limit, current current, battery capacity (in > percentage), voltage max and min limits, current voltage and battery > capacity (in Ah). > > This battery driver uses the AXP20X/AXP22X ADC driver as PMIC data > provider. > > Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> > --- > drivers/power/supply/Kconfig | 12 + > drivers/power/supply/Makefile | 1 + > drivers/power/supply/axp20x_battery.c | 458 ++++++++++++++++++++++++++++++++++ > 3 files changed, 471 insertions(+) > create mode 100644 drivers/power/supply/axp20x_battery.c > > diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig > index c552b4b..48619de 100644 > --- a/drivers/power/supply/Kconfig > +++ b/drivers/power/supply/Kconfig > @@ -226,6 +226,18 @@ config CHARGER_AXP20X > This driver can also be built as a module. If so, the module will be > called axp20x_ac_power. > > +config BATTERY_AXP20X > + tristate "X-Powers AXP20X battery driver" > + depends on MFD_AXP20X > + depends on AXP20X_ADC > + depends on IIO > + help > + Say Y here to enable support for X-Powers AXP20X PMICs' battery power > + supply. > + > + This driver can also be built as a module. If so, the module will be > + called axp20x_battery. > + > config AXP288_CHARGER > tristate "X-Powers AXP288 Charger" > depends on MFD_AXP20X && EXTCON_AXP288 > diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile > index 7d22417..5a217b2 100644 > --- a/drivers/power/supply/Makefile > +++ b/drivers/power/supply/Makefile > @@ -18,6 +18,7 @@ obj-$(CONFIG_TEST_POWER) += test_power.o > > obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o > obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o > +obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o > obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o > obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o > obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o > diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c > new file mode 100644 > index 0000000..e1d7b5f > --- /dev/null > +++ b/drivers/power/supply/axp20x_battery.c > @@ -0,0 +1,458 @@ > +/* > + * Battery power supply driver for X-Powers AXP20X and AXP22X PMICs > + * > + * Copyright 2016 Free Electrons NextThing Co. > + * Quentin Schulz <quentin.schulz@free-electrons.com> > + * > + * This driver is based on a previous upstreaming attempt by: > + * Bruno Prémont <bonbons@linux-vserver.org> > + * > + * This file is subject to the terms and conditions of the GNU General > + * Public License. See the file "COPYING" in the main directory of this > + * archive for more details. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/err.h> > +#include <linux/interrupt.h> > +#include <linux/irq.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/power_supply.h> > +#include <linux/regmap.h> > +#include <linux/slab.h> > +#include <linux/time.h> > +#include <linux/iio/iio.h> > +#include <linux/iio/consumer.h> > +#include <linux/mfd/axp20x.h> > + > +#define AXP20X_PWR_STATUS_BAT_CHARGING BIT(2) > + > +#define AXP20X_PWR_OP_BATT_PRESENT BIT(5) > +#define AXP20X_PWR_OP_BATT_ACTIVATED BIT(3) > + > +#define AXP209_FG_PERCENT GENMASK(6, 0) > +#define AXP22X_FG_VALID BIT(7) > + > +#define AXP20X_CHRG_CTRL1_TGT_VOLT GENMASK(6, 5) > +#define AXP20X_CHRG_CTRL1_TGT_4_1V (0 << 5) > +#define AXP20X_CHRG_CTRL1_TGT_4_15V BIT(5) > +#define AXP20X_CHRG_CTRL1_TGT_4_2V (2 << 5) > +#define AXP20X_CHRG_CTRL1_TGT_4_36V (3 << 5) > +#define AXP20X_CHRG_CTRL1_TGT_CURR GENMASK(3, 0) > + > +#define AXP22X_CHRG_CTRL1_TGT_4_22V BIT(5) > +#define AXP22X_CHRG_CTRL1_TGT_4_24V (3 << 5) > + > +#define AXP20X_V_OFF_MASK GENMASK(2, 0) > + > +struct axp20x_batt_ps { > + struct regmap *regmap; > + struct power_supply *batt; > + struct axp20x_dev *axp20x; > + struct iio_channel *batt_chrg_i; > + struct iio_channel *batt_dischrg_i; > + struct iio_channel *batt_v; > + u8 axp_id; > +}; > + > +static int axp20x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt, > + int *val) > +{ > + int ret, reg; > + > + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); > + if (ret) > + return ret; > + > + switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) { > + case AXP20X_CHRG_CTRL1_TGT_4_1V: > + *val = 4100000; > + break; > + case AXP20X_CHRG_CTRL1_TGT_4_15V: > + *val = 4150000; > + break; > + case AXP20X_CHRG_CTRL1_TGT_4_2V: > + *val = 4200000; > + break; > + case AXP20X_CHRG_CTRL1_TGT_4_36V: > + *val = 4360000; > + break; > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int axp22x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt, > + int *val) > +{ > + int ret, reg; > + > + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); > + if (ret) > + return ret; > + > + switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) { > + case AXP20X_CHRG_CTRL1_TGT_4_1V: > + *val = 4100000; > + break; > + case AXP20X_CHRG_CTRL1_TGT_4_2V: > + *val = 4200000; > + break; > + case AXP22X_CHRG_CTRL1_TGT_4_22V: > + *val = 4220000; > + break; > + case AXP22X_CHRG_CTRL1_TGT_4_24V: > + *val = 4240000; > + break; > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int axp20x_battery_get_prop(struct power_supply *psy, > + enum power_supply_property psp, > + union power_supply_propval *val) > +{ > + struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy); > + struct iio_channel *chan; > + int ret = 0, reg, val1; > + > + switch (psp) { > + case POWER_SUPPLY_PROP_PRESENT: > + case POWER_SUPPLY_PROP_ONLINE: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE, > + ®); > + if (ret) > + return ret; > + > + val->intval = !!(reg & AXP20X_PWR_OP_BATT_PRESENT); > + break; > + > + case POWER_SUPPLY_PROP_STATUS: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS, > + ®); > + if (ret) > + return ret; > + > + if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) { > + val->intval = POWER_SUPPLY_STATUS_CHARGING; > + return 0; > + } > + > + ret = iio_read_channel_processed(axp20x_batt->batt_dischrg_i, > + &val1); > + if (ret) > + return ret; > + > + if (val1) { > + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; > + return 0; > + } > + > + ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, &val1); > + if (ret) > + return ret; > + > + /* > + * Fuel Gauge data takes 7 bits but the stored value seems to be > + * directly the raw percentage without any scaling to 7 bits. > + */ > + if ((val1 & AXP209_FG_PERCENT) == 100) > + val->intval = POWER_SUPPLY_STATUS_FULL; > + else > + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; > + break; > + > + case POWER_SUPPLY_PROP_HEALTH: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE, > + &val1); > + if (ret) > + return ret; > + > + if (val1 & AXP20X_PWR_OP_BATT_ACTIVATED) { > + val->intval = POWER_SUPPLY_HEALTH_DEAD; > + return 0; > + } > + > + val->intval = POWER_SUPPLY_HEALTH_GOOD; > + break; > + > + case POWER_SUPPLY_PROP_CURRENT_MAX: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); > + if (ret) > + return ret; > + > + reg &= AXP20X_CHRG_CTRL1_TGT_CURR; > + val->intval = reg * 100000 + 300000; > + break; This controls the charge current. I believe the correct property to use is CONSTANT_CHARGE_CURRENT. And you should add CONSTANT_CHARGE_CURRENT_MAX which returns the highest possible setting. Also letting the user control this might not always be a good idea. IIUC, LiPo batteries can only be charged at 1C, where C is the rated capacity (X mAh). > + > + case POWER_SUPPLY_PROP_CURRENT_NOW: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS, > + ®); > + if (ret) > + return ret; > + > + if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) > + chan = axp20x_batt->batt_chrg_i; > + else > + chan = axp20x_batt->batt_dischrg_i; > + > + ret = iio_read_channel_processed(chan, &val->intval); > + if (ret) > + return ret; > + > + /* > + * IIO framework gives mV but Power Supply framework gives µV. > + */ > + val->intval *= 1000; > + break; > + > + case POWER_SUPPLY_PROP_CAPACITY: > + /* When no battery is present, return capacity is 100% */ > + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE, > + ®); > + if (ret) > + return ret; > + > + if (!(reg & AXP20X_PWR_OP_BATT_PRESENT)) { > + val->intval = 100; > + return 0; > + } > + > + ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, ®); > + if (ret) > + return ret; > + > + if (axp20x_batt->axp_id == AXP221_ID && > + !(reg & AXP22X_FG_VALID)) > + return -EINVAL; > + > + /* > + * Fuel Gauge data takes 7 bits but the stored value seems to be > + * directly the raw percentage without any scaling to 7 bits. > + */ > + val->intval = reg & AXP209_FG_PERCENT; > + break; > + > + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: > + if (axp20x_batt->axp_id == AXP209_ID) > + return axp20x_battery_get_max_voltage(axp20x_batt, > + &val->intval); > + return axp22x_battery_get_max_voltage(axp20x_batt, > + &val->intval); > + > + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_V_OFF, ®); > + if (ret) > + return ret; > + > + val->intval = 2600000 + 100000 * (reg & AXP20X_V_OFF_MASK); > + break; > + > + case POWER_SUPPLY_PROP_VOLTAGE_NOW: > + ret = iio_read_channel_processed(axp20x_batt->batt_v, > + &val->intval); > + if (ret) > + return ret; > + > + /* > + * IIO framework gives mV but Power Supply framework gives µV. > + */ > + val->intval *= 1000; > + break; > + > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt, > + int val) > +{ > + switch (val) { > + case 4100000: > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_VOLT, > + AXP20X_CHRG_CTRL1_TGT_4_1V); > + case 4150000: > + if (axp20x_batt->axp_id == AXP221_ID) > + return -EINVAL; > + > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_VOLT, > + AXP20X_CHRG_CTRL1_TGT_4_15V); > + case 4200000: > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_VOLT, > + AXP20X_CHRG_CTRL1_TGT_4_2V); > + default: > + /* > + * AXP20x max voltage can be set to 4.36V and AXP22X max voltage > + * can be set to 4.22V and 4.24V, but these voltages are too > + * high for Lithium based batteries (AXP PMICs are supposed to > + * be used with these kinds of battery). > + */ > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int axp20x_battery_set_prop(struct power_supply *psy, > + enum power_supply_property psp, > + const union power_supply_propval *val) > +{ > + struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy); > + int ret = 0, val1; > + > + switch (psp) { > + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: > + val1 = (val->intval - 2600000) / 100000; > + if (val1 < 0 || val1 > AXP20X_V_OFF_MASK) > + return -EINVAL; > + > + return regmap_update_bits(axp20x_batt->regmap, AXP20X_V_OFF, > + AXP20X_V_OFF_MASK, val1); > + > + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: > + return axp20x_battery_set_max_voltage(axp20x_batt, val->intval); > + > + case POWER_SUPPLY_PROP_CURRENT_MAX: > + if (axp20x_batt->axp_id == AXP209_ID) > + val1 = (val->intval - 300000) / 100000; > + else > + val1 = (val->intval - 300000) / 150000; > + > + if (val1 > AXP20X_CHRG_CTRL1_TGT_CURR || val1 < 0) > + return -EINVAL; > + > + return regmap_update_bits(axp20x_batt->regmap, > + AXP20X_CHRG_CTRL1, > + AXP20X_CHRG_CTRL1_TGT_CURR, val1); > + > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static enum power_supply_property axp20x_battery_props[] = { > + POWER_SUPPLY_PROP_PRESENT, > + POWER_SUPPLY_PROP_ONLINE, > + POWER_SUPPLY_PROP_STATUS, > + POWER_SUPPLY_PROP_VOLTAGE_NOW, > + POWER_SUPPLY_PROP_CURRENT_NOW, > + POWER_SUPPLY_PROP_CURRENT_MAX, > + POWER_SUPPLY_PROP_HEALTH, > + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, > + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, > + POWER_SUPPLY_PROP_CAPACITY, You can also add POWER_SUPPLY_PROP_TECHNOLOGY, which would return POWER_SUPPLY_TECHNOLOGY_LIPO. It is also possible to do POWER_SUPPLY_PROP_CHARGE_TYPE. According to the manual, if the battery is charging, it is in constant current mode (POWER_SUPPLY_CHARGE_TYPE_FAST) when V_battery < V_target. When V_battery == V_target, it is in constant voltage mode, though I don't think this is the same as POWER_SUPPLY_CHARGE_TYPE_TRICKLE. When it is not charging, you can return POWER_SUPPLY_CHARGE_TYPE_NONE. Regards ChenYu > +}; > + > +static int axp20x_battery_prop_writeable(struct power_supply *psy, > + enum power_supply_property psp) > +{ > + return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN || > + psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN || > + psp == POWER_SUPPLY_PROP_CURRENT_MAX; > +} > + > +static const struct power_supply_desc axp20x_batt_ps_desc = { > + .name = "axp20x-battery", > + .type = POWER_SUPPLY_TYPE_BATTERY, > + .properties = axp20x_battery_props, > + .num_properties = ARRAY_SIZE(axp20x_battery_props), > + .property_is_writeable = axp20x_battery_prop_writeable, > + .get_property = axp20x_battery_get_prop, > + .set_property = axp20x_battery_set_prop, > +}; > + > +static const struct of_device_id axp20x_battery_ps_id[] = { > + { > + .compatible = "x-powers,axp209-battery-power-supply", > + .data = (void *)AXP209_ID, > + }, { > + .compatible = "x-powers,axp221-battery-power-supply", > + .data = (void *)AXP221_ID, > + }, { /* sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, axp20x_battery_ps_id); > + > +static int axp20x_power_probe(struct platform_device *pdev) > +{ > + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); > + struct axp20x_batt_ps *axp20x_batt; > + struct power_supply_config psy_cfg = {}; > + > + axp20x_batt = devm_kzalloc(&pdev->dev, sizeof(*axp20x_batt), > + GFP_KERNEL); > + if (!axp20x_batt) > + return -ENOMEM; > + > + axp20x_batt->batt_v = devm_iio_channel_get(&pdev->dev, "batt_v"); > + if (IS_ERR(axp20x_batt->batt_v)) { > + if (PTR_ERR(axp20x_batt->batt_v) == -ENODEV) > + return -EPROBE_DEFER; > + return PTR_ERR(axp20x_batt->batt_v); > + } > + > + axp20x_batt->batt_chrg_i = devm_iio_channel_get(&pdev->dev, > + "batt_chrg_i"); > + if (IS_ERR(axp20x_batt->batt_chrg_i)) { > + if (PTR_ERR(axp20x_batt->batt_chrg_i) == -ENODEV) > + return -EPROBE_DEFER; > + return PTR_ERR(axp20x_batt->batt_chrg_i); > + } > + > + axp20x_batt->batt_dischrg_i = devm_iio_channel_get(&pdev->dev, > + "batt_dischrg_i"); > + if (IS_ERR(axp20x_batt->batt_dischrg_i)) { > + if (PTR_ERR(axp20x_batt->batt_dischrg_i) == -ENODEV) > + return -EPROBE_DEFER; > + return PTR_ERR(axp20x_batt->batt_dischrg_i); > + } > + > + axp20x_batt->regmap = axp20x->regmap; > + platform_set_drvdata(pdev, axp20x_batt); > + > + psy_cfg.drv_data = axp20x_batt; > + psy_cfg.of_node = pdev->dev.of_node; > + > + axp20x_batt->axp_id = (int)of_device_get_match_data(&pdev->dev); > + > + axp20x_batt->batt = devm_power_supply_register(&pdev->dev, > + &axp20x_batt_ps_desc, > + &psy_cfg); > + return PTR_ERR_OR_ZERO(axp20x_batt->batt); > +} > + > +static struct platform_driver axp20x_batt_driver = { > + .probe = axp20x_power_probe, > + .driver = { > + .name = "axp20x-battery-power-supply", > + .of_match_table = axp20x_battery_ps_id, > + }, > +}; > + > +module_platform_driver(axp20x_batt_driver); > + > +MODULE_DESCRIPTION("Battery power supply driver for AXP20X and AXP22X PMICs"); > +MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>"); > +MODULE_LICENSE("GPL"); > -- > 2.9.3 >
Hi, On 06/01/2017 04:39, Chen-Yu Tsai wrote: > Hi, > > On Tue, Jan 3, 2017 at 12:37 AM, Quentin Schulz > <quentin.schulz@free-electrons.com> wrote: [...] >> + case POWER_SUPPLY_PROP_CURRENT_MAX: >> + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); >> + if (ret) >> + return ret; >> + >> + reg &= AXP20X_CHRG_CTRL1_TGT_CURR; >> + val->intval = reg * 100000 + 300000; >> + break; > > > This controls the charge current. I believe the correct property to use > is CONSTANT_CHARGE_CURRENT. And you should add CONSTANT_CHARGE_CURRENT_MAX > which returns the highest possible setting. > ACK. > Also letting the user control this might not always be a good idea. > IIUC, LiPo batteries can only be charged at 1C, where C is the > rated capacity (X mAh). > OK. Should I get the charge current from a DT property then? Like "x-powers,charge-current = <300000>;" It's close to what has been done in bq24257_charger for example. [...] >> +static enum power_supply_property axp20x_battery_props[] = { >> + POWER_SUPPLY_PROP_PRESENT, >> + POWER_SUPPLY_PROP_ONLINE, >> + POWER_SUPPLY_PROP_STATUS, >> + POWER_SUPPLY_PROP_VOLTAGE_NOW, >> + POWER_SUPPLY_PROP_CURRENT_NOW, >> + POWER_SUPPLY_PROP_CURRENT_MAX, >> + POWER_SUPPLY_PROP_HEALTH, >> + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, >> + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, >> + POWER_SUPPLY_PROP_CAPACITY, > > You can also add POWER_SUPPLY_PROP_TECHNOLOGY, which would return > POWER_SUPPLY_TECHNOLOGY_LIPO. > Hum.. There are also POWER_SUPPLY_TECHNOLOGY_LION, POWER_SUPPLY_TECHNOLOGY_LiFe and POWER_SUPPLY_TECHNOLOGY_LiMn which are all Lithium-based batteries. From the datasheet, it can take a "single cell Li-battery (Li-Ion/Polymer)". So I guess it's either POWER_SUPPLY_TECHNOLOGY_LION or POWER_SUPPLY_TECHNOLOGY_LIPO. > It is also possible to do POWER_SUPPLY_PROP_CHARGE_TYPE. According > to the manual, if the battery is charging, it is in constant current > mode (POWER_SUPPLY_CHARGE_TYPE_FAST) when V_battery < V_target. > When V_battery == V_target, it is in constant voltage mode, though > I don't think this is the same as POWER_SUPPLY_CHARGE_TYPE_TRICKLE. > When it is not charging, you can return POWER_SUPPLY_CHARGE_TYPE_NONE. > ACK, I'll look into that. Thanks, Quentin
Hi Quentin, Just a couple of small things in this patch. On Mon, Jan 02, 2017 at 05:37:17PM +0100, Quentin Schulz wrote: > [...] > + case POWER_SUPPLY_PROP_CURRENT_NOW: > + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS, > + ®); > + if (ret) > + return ret; > + > + if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) > + chan = axp20x_batt->batt_chrg_i; > + else > + chan = axp20x_batt->batt_dischrg_i; > + > + ret = iio_read_channel_processed(chan, &val->intval); > + if (ret) > + return ret; > + > + /* > + * IIO framework gives mV but Power Supply framework gives µV. > + */ Nit: Volt -> Ampere > + val->intval *= 1000; > + break; > > [...] > > +static int axp20x_power_probe(struct platform_device *pdev) > +{ > + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); > + struct axp20x_batt_ps *axp20x_batt; > + struct power_supply_config psy_cfg = {}; > + > + axp20x_batt = devm_kzalloc(&pdev->dev, sizeof(*axp20x_batt), > + GFP_KERNEL); > + if (!axp20x_batt) > + return -ENOMEM; > + > + axp20x_batt->batt_v = devm_iio_channel_get(&pdev->dev, "batt_v"); > + if (IS_ERR(axp20x_batt->batt_v)) { > + if (PTR_ERR(axp20x_batt->batt_v) == -ENODEV) > + return -EPROBE_DEFER; > + return PTR_ERR(axp20x_batt->batt_v); > + } > + > + axp20x_batt->batt_chrg_i = devm_iio_channel_get(&pdev->dev, > + "batt_chrg_i"); > + if (IS_ERR(axp20x_batt->batt_chrg_i)) { > + if (PTR_ERR(axp20x_batt->batt_chrg_i) == -ENODEV) > + return -EPROBE_DEFER; > + return PTR_ERR(axp20x_batt->batt_chrg_i); > + } > + > + axp20x_batt->batt_dischrg_i = devm_iio_channel_get(&pdev->dev, > + "batt_dischrg_i"); > + if (IS_ERR(axp20x_batt->batt_dischrg_i)) { > + if (PTR_ERR(axp20x_batt->batt_dischrg_i) == -ENODEV) > + return -EPROBE_DEFER; > + return PTR_ERR(axp20x_batt->batt_dischrg_i); > + } > + > + axp20x_batt->regmap = axp20x->regmap; > + platform_set_drvdata(pdev, axp20x_batt); Please use drv_get_regmap(pdev->dev.parent, NULL) instead (and drop axp20x). > + psy_cfg.drv_data = axp20x_batt; > + psy_cfg.of_node = pdev->dev.of_node; > + > + axp20x_batt->axp_id = (int)of_device_get_match_data(&pdev->dev); use (uintptr_t) to avoid compiler warnings on systems with sizeof int != sizeof ptr. -- Sebastian
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index c552b4b..48619de 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -226,6 +226,18 @@ config CHARGER_AXP20X This driver can also be built as a module. If so, the module will be called axp20x_ac_power. +config BATTERY_AXP20X + tristate "X-Powers AXP20X battery driver" + depends on MFD_AXP20X + depends on AXP20X_ADC + depends on IIO + help + Say Y here to enable support for X-Powers AXP20X PMICs' battery power + supply. + + This driver can also be built as a module. If so, the module will be + called axp20x_battery. + config AXP288_CHARGER tristate "X-Powers AXP288 Charger" depends on MFD_AXP20X && EXTCON_AXP288 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 7d22417..5a217b2 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_TEST_POWER) += test_power.o obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o +obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c new file mode 100644 index 0000000..e1d7b5f --- /dev/null +++ b/drivers/power/supply/axp20x_battery.c @@ -0,0 +1,458 @@ +/* + * Battery power supply driver for X-Powers AXP20X and AXP22X PMICs + * + * Copyright 2016 Free Electrons NextThing Co. + * Quentin Schulz <quentin.schulz@free-electrons.com> + * + * This driver is based on a previous upstreaming attempt by: + * Bruno Prémont <bonbons@linux-vserver.org> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/power_supply.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <linux/iio/iio.h> +#include <linux/iio/consumer.h> +#include <linux/mfd/axp20x.h> + +#define AXP20X_PWR_STATUS_BAT_CHARGING BIT(2) + +#define AXP20X_PWR_OP_BATT_PRESENT BIT(5) +#define AXP20X_PWR_OP_BATT_ACTIVATED BIT(3) + +#define AXP209_FG_PERCENT GENMASK(6, 0) +#define AXP22X_FG_VALID BIT(7) + +#define AXP20X_CHRG_CTRL1_TGT_VOLT GENMASK(6, 5) +#define AXP20X_CHRG_CTRL1_TGT_4_1V (0 << 5) +#define AXP20X_CHRG_CTRL1_TGT_4_15V BIT(5) +#define AXP20X_CHRG_CTRL1_TGT_4_2V (2 << 5) +#define AXP20X_CHRG_CTRL1_TGT_4_36V (3 << 5) +#define AXP20X_CHRG_CTRL1_TGT_CURR GENMASK(3, 0) + +#define AXP22X_CHRG_CTRL1_TGT_4_22V BIT(5) +#define AXP22X_CHRG_CTRL1_TGT_4_24V (3 << 5) + +#define AXP20X_V_OFF_MASK GENMASK(2, 0) + +struct axp20x_batt_ps { + struct regmap *regmap; + struct power_supply *batt; + struct axp20x_dev *axp20x; + struct iio_channel *batt_chrg_i; + struct iio_channel *batt_dischrg_i; + struct iio_channel *batt_v; + u8 axp_id; +}; + +static int axp20x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt, + int *val) +{ + int ret, reg; + + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); + if (ret) + return ret; + + switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) { + case AXP20X_CHRG_CTRL1_TGT_4_1V: + *val = 4100000; + break; + case AXP20X_CHRG_CTRL1_TGT_4_15V: + *val = 4150000; + break; + case AXP20X_CHRG_CTRL1_TGT_4_2V: + *val = 4200000; + break; + case AXP20X_CHRG_CTRL1_TGT_4_36V: + *val = 4360000; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int axp22x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt, + int *val) +{ + int ret, reg; + + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); + if (ret) + return ret; + + switch (reg & AXP20X_CHRG_CTRL1_TGT_VOLT) { + case AXP20X_CHRG_CTRL1_TGT_4_1V: + *val = 4100000; + break; + case AXP20X_CHRG_CTRL1_TGT_4_2V: + *val = 4200000; + break; + case AXP22X_CHRG_CTRL1_TGT_4_22V: + *val = 4220000; + break; + case AXP22X_CHRG_CTRL1_TGT_4_24V: + *val = 4240000; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int axp20x_battery_get_prop(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy); + struct iio_channel *chan; + int ret = 0, reg, val1; + + switch (psp) { + case POWER_SUPPLY_PROP_PRESENT: + case POWER_SUPPLY_PROP_ONLINE: + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE, + ®); + if (ret) + return ret; + + val->intval = !!(reg & AXP20X_PWR_OP_BATT_PRESENT); + break; + + case POWER_SUPPLY_PROP_STATUS: + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS, + ®); + if (ret) + return ret; + + if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) { + val->intval = POWER_SUPPLY_STATUS_CHARGING; + return 0; + } + + ret = iio_read_channel_processed(axp20x_batt->batt_dischrg_i, + &val1); + if (ret) + return ret; + + if (val1) { + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + return 0; + } + + ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, &val1); + if (ret) + return ret; + + /* + * Fuel Gauge data takes 7 bits but the stored value seems to be + * directly the raw percentage without any scaling to 7 bits. + */ + if ((val1 & AXP209_FG_PERCENT) == 100) + val->intval = POWER_SUPPLY_STATUS_FULL; + else + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + + case POWER_SUPPLY_PROP_HEALTH: + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE, + &val1); + if (ret) + return ret; + + if (val1 & AXP20X_PWR_OP_BATT_ACTIVATED) { + val->intval = POWER_SUPPLY_HEALTH_DEAD; + return 0; + } + + val->intval = POWER_SUPPLY_HEALTH_GOOD; + break; + + case POWER_SUPPLY_PROP_CURRENT_MAX: + ret = regmap_read(axp20x_batt->regmap, AXP20X_CHRG_CTRL1, ®); + if (ret) + return ret; + + reg &= AXP20X_CHRG_CTRL1_TGT_CURR; + val->intval = reg * 100000 + 300000; + break; + + case POWER_SUPPLY_PROP_CURRENT_NOW: + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_INPUT_STATUS, + ®); + if (ret) + return ret; + + if (reg & AXP20X_PWR_STATUS_BAT_CHARGING) + chan = axp20x_batt->batt_chrg_i; + else + chan = axp20x_batt->batt_dischrg_i; + + ret = iio_read_channel_processed(chan, &val->intval); + if (ret) + return ret; + + /* + * IIO framework gives mV but Power Supply framework gives µV. + */ + val->intval *= 1000; + break; + + case POWER_SUPPLY_PROP_CAPACITY: + /* When no battery is present, return capacity is 100% */ + ret = regmap_read(axp20x_batt->regmap, AXP20X_PWR_OP_MODE, + ®); + if (ret) + return ret; + + if (!(reg & AXP20X_PWR_OP_BATT_PRESENT)) { + val->intval = 100; + return 0; + } + + ret = regmap_read(axp20x_batt->regmap, AXP20X_FG_RES, ®); + if (ret) + return ret; + + if (axp20x_batt->axp_id == AXP221_ID && + !(reg & AXP22X_FG_VALID)) + return -EINVAL; + + /* + * Fuel Gauge data takes 7 bits but the stored value seems to be + * directly the raw percentage without any scaling to 7 bits. + */ + val->intval = reg & AXP209_FG_PERCENT; + break; + + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + if (axp20x_batt->axp_id == AXP209_ID) + return axp20x_battery_get_max_voltage(axp20x_batt, + &val->intval); + return axp22x_battery_get_max_voltage(axp20x_batt, + &val->intval); + + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + ret = regmap_read(axp20x_batt->regmap, AXP20X_V_OFF, ®); + if (ret) + return ret; + + val->intval = 2600000 + 100000 * (reg & AXP20X_V_OFF_MASK); + break; + + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + ret = iio_read_channel_processed(axp20x_batt->batt_v, + &val->intval); + if (ret) + return ret; + + /* + * IIO framework gives mV but Power Supply framework gives µV. + */ + val->intval *= 1000; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt, + int val) +{ + switch (val) { + case 4100000: + return regmap_update_bits(axp20x_batt->regmap, + AXP20X_CHRG_CTRL1, + AXP20X_CHRG_CTRL1_TGT_VOLT, + AXP20X_CHRG_CTRL1_TGT_4_1V); + case 4150000: + if (axp20x_batt->axp_id == AXP221_ID) + return -EINVAL; + + return regmap_update_bits(axp20x_batt->regmap, + AXP20X_CHRG_CTRL1, + AXP20X_CHRG_CTRL1_TGT_VOLT, + AXP20X_CHRG_CTRL1_TGT_4_15V); + case 4200000: + return regmap_update_bits(axp20x_batt->regmap, + AXP20X_CHRG_CTRL1, + AXP20X_CHRG_CTRL1_TGT_VOLT, + AXP20X_CHRG_CTRL1_TGT_4_2V); + default: + /* + * AXP20x max voltage can be set to 4.36V and AXP22X max voltage + * can be set to 4.22V and 4.24V, but these voltages are too + * high for Lithium based batteries (AXP PMICs are supposed to + * be used with these kinds of battery). + */ + return -EINVAL; + } + + return 0; +} + +static int axp20x_battery_set_prop(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct axp20x_batt_ps *axp20x_batt = power_supply_get_drvdata(psy); + int ret = 0, val1; + + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + val1 = (val->intval - 2600000) / 100000; + if (val1 < 0 || val1 > AXP20X_V_OFF_MASK) + return -EINVAL; + + return regmap_update_bits(axp20x_batt->regmap, AXP20X_V_OFF, + AXP20X_V_OFF_MASK, val1); + + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + return axp20x_battery_set_max_voltage(axp20x_batt, val->intval); + + case POWER_SUPPLY_PROP_CURRENT_MAX: + if (axp20x_batt->axp_id == AXP209_ID) + val1 = (val->intval - 300000) / 100000; + else + val1 = (val->intval - 300000) / 150000; + + if (val1 > AXP20X_CHRG_CTRL1_TGT_CURR || val1 < 0) + return -EINVAL; + + return regmap_update_bits(axp20x_batt->regmap, + AXP20X_CHRG_CTRL1, + AXP20X_CHRG_CTRL1_TGT_CURR, val1); + + default: + return -EINVAL; + } + + return 0; +} + +static enum power_supply_property axp20x_battery_props[] = { + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_CAPACITY, +}; + +static int axp20x_battery_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN || + psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN || + psp == POWER_SUPPLY_PROP_CURRENT_MAX; +} + +static const struct power_supply_desc axp20x_batt_ps_desc = { + .name = "axp20x-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = axp20x_battery_props, + .num_properties = ARRAY_SIZE(axp20x_battery_props), + .property_is_writeable = axp20x_battery_prop_writeable, + .get_property = axp20x_battery_get_prop, + .set_property = axp20x_battery_set_prop, +}; + +static const struct of_device_id axp20x_battery_ps_id[] = { + { + .compatible = "x-powers,axp209-battery-power-supply", + .data = (void *)AXP209_ID, + }, { + .compatible = "x-powers,axp221-battery-power-supply", + .data = (void *)AXP221_ID, + }, { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, axp20x_battery_ps_id); + +static int axp20x_power_probe(struct platform_device *pdev) +{ + struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); + struct axp20x_batt_ps *axp20x_batt; + struct power_supply_config psy_cfg = {}; + + axp20x_batt = devm_kzalloc(&pdev->dev, sizeof(*axp20x_batt), + GFP_KERNEL); + if (!axp20x_batt) + return -ENOMEM; + + axp20x_batt->batt_v = devm_iio_channel_get(&pdev->dev, "batt_v"); + if (IS_ERR(axp20x_batt->batt_v)) { + if (PTR_ERR(axp20x_batt->batt_v) == -ENODEV) + return -EPROBE_DEFER; + return PTR_ERR(axp20x_batt->batt_v); + } + + axp20x_batt->batt_chrg_i = devm_iio_channel_get(&pdev->dev, + "batt_chrg_i"); + if (IS_ERR(axp20x_batt->batt_chrg_i)) { + if (PTR_ERR(axp20x_batt->batt_chrg_i) == -ENODEV) + return -EPROBE_DEFER; + return PTR_ERR(axp20x_batt->batt_chrg_i); + } + + axp20x_batt->batt_dischrg_i = devm_iio_channel_get(&pdev->dev, + "batt_dischrg_i"); + if (IS_ERR(axp20x_batt->batt_dischrg_i)) { + if (PTR_ERR(axp20x_batt->batt_dischrg_i) == -ENODEV) + return -EPROBE_DEFER; + return PTR_ERR(axp20x_batt->batt_dischrg_i); + } + + axp20x_batt->regmap = axp20x->regmap; + platform_set_drvdata(pdev, axp20x_batt); + + psy_cfg.drv_data = axp20x_batt; + psy_cfg.of_node = pdev->dev.of_node; + + axp20x_batt->axp_id = (int)of_device_get_match_data(&pdev->dev); + + axp20x_batt->batt = devm_power_supply_register(&pdev->dev, + &axp20x_batt_ps_desc, + &psy_cfg); + return PTR_ERR_OR_ZERO(axp20x_batt->batt); +} + +static struct platform_driver axp20x_batt_driver = { + .probe = axp20x_power_probe, + .driver = { + .name = "axp20x-battery-power-supply", + .of_match_table = axp20x_battery_ps_id, + }, +}; + +module_platform_driver(axp20x_batt_driver); + +MODULE_DESCRIPTION("Battery power supply driver for AXP20X and AXP22X PMICs"); +MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>"); +MODULE_LICENSE("GPL");
The X-Powers AXP20X and AXP22X PMICs can have a battery as power supply. This patch adds the battery power supply driver to get various data from the PMIC, such as the battery status (charging, discharging, full, dead), current max limit, current current, battery capacity (in percentage), voltage max and min limits, current voltage and battery capacity (in Ah). This battery driver uses the AXP20X/AXP22X ADC driver as PMIC data provider. Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> --- drivers/power/supply/Kconfig | 12 + drivers/power/supply/Makefile | 1 + drivers/power/supply/axp20x_battery.c | 458 ++++++++++++++++++++++++++++++++++ 3 files changed, 471 insertions(+) create mode 100644 drivers/power/supply/axp20x_battery.c