On 16.09.2015 02:58, Andreas Dannenberg wrote: > A new optional device property called "ti,ovp-voltage" is introduced to > allow configuring the input over voltage protection setting. > > This commit also adds the basic sysfs support for custom properties > which is being used to allow userspace to read the current ovp-voltage > setting. > > Signed-off-by: Andreas Dannenberg <dannenberg@xxxxxx> > --- > drivers/power/bq24257_charger.c | 67 +++++++++++++++++++++++++++++++++++++++-- > 1 file changed, 64 insertions(+), 3 deletions(-) > > diff --git a/drivers/power/bq24257_charger.c b/drivers/power/bq24257_charger.c > index d7488cf..47af858 100644 > --- a/drivers/power/bq24257_charger.c > +++ b/drivers/power/bq24257_charger.c > @@ -75,6 +75,7 @@ struct bq24257_init_data { > u8 vbat; /* regulation voltage */ > u8 iterm; /* termination current */ > u8 in_ilimit; /* input current limit */ > + u8 vovp; /* over voltage protection voltage */ > }; > > struct bq24257_state { > @@ -198,6 +199,13 @@ static const u32 bq24257_iilimit_map[] = { > > #define BQ24257_IILIMIT_MAP_SIZE ARRAY_SIZE(bq24257_iilimit_map) > > +static const u32 bq24257_vovp_map[] = { > + 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000, > + 10500000 > +}; > + > +#define BQ24257_VOVP_MAP_SIZE ARRAY_SIZE(bq24257_vovp_map) > + > static int bq24257_field_read(struct bq24257_device *bq, > enum bq24257_fields field_id) > { > @@ -413,6 +421,17 @@ enum bq24257_in_ilimit { > IILIMIT_NONE, > }; > > +enum bq24257_vovp { > + VOVP_6000, > + VOVP_6500, > + VOVP_7000, > + VOVP_8000, > + VOVP_9000, > + VOVP_9500, > + VOVP_10000, > + VOVP_10500 > +}; What is the purpose of this enum? It is duplicating values from the map (so you can make a mistake in its order) but actually is not used. I don't see benefit. > + > enum bq24257_port_type { > PORT_TYPE_DCP, /* Dedicated Charging Port */ > PORT_TYPE_CDP, /* Charging Downstream Port */ > @@ -594,7 +613,8 @@ static int bq24257_hw_init(struct bq24257_device *bq) > } init_data[] = { > {F_ICHG, bq->init_data.ichg}, > {F_VBAT, bq->init_data.vbat}, > - {F_ITERM, bq->init_data.iterm} > + {F_ITERM, bq->init_data.iterm}, > + {F_VOVP, bq->init_data.vovp}, > }; > > /* > @@ -664,6 +684,28 @@ static const struct power_supply_desc bq24257_power_supply_desc = { > .get_property = bq24257_power_supply_get_property, > }; > > +static ssize_t bq24257_show_ovp_voltage(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct power_supply *psy = dev_get_drvdata(dev); > + struct bq24257_device *bq = power_supply_get_drvdata(psy); > + > + return scnprintf(buf, PAGE_SIZE, "%d\n", "%u", you are printing u32. > + bq24257_vovp_map[bq->init_data.vovp]); > +} > + > +static DEVICE_ATTR(ovp_voltage, S_IRUGO, bq24257_show_ovp_voltage, NULL); > + > +static struct attribute *bq24257_charger_attr[] = { > + &dev_attr_ovp_voltage.attr, > + NULL, > +}; > + > +static const struct attribute_group bq24257_attr_group = { > + .attrs = bq24257_charger_attr, > +}; > + > static int bq24257_power_supply_init(struct bq24257_device *bq) > { > struct power_supply_config psy_cfg = { .drv_data = bq, }; > @@ -750,6 +792,15 @@ static int bq24257_fw_probe(struct bq24257_device *bq) > BQ24257_IILIMIT_MAP_SIZE); > } > > + ret = device_property_read_u32(bq->dev, "ti,ovp-voltage", > + &property); > + if (ret < 0) > + bq->init_data.vovp = VOVP_6500; > + else > + bq->init_data.vovp = bq24257_find_idx(property, > + bq24257_vovp_map, > + BQ24257_VOVP_MAP_SIZE); > + > return 0; > } > > @@ -889,10 +940,18 @@ static int bq24257_probe(struct i2c_client *client, > return ret; > > ret = bq24257_power_supply_init(bq); > - if (ret < 0) > + if (ret < 0) { > dev_err(dev, "Failed to register power supply\n"); > + return ret; > + } > > - return ret; > + ret = sysfs_create_group(&bq->charger->dev.kobj, &bq24257_attr_group); > + if (ret < 0) { > + dev_err(dev, "Can't create sysfs entries\n"); power_supply_unregister(bq->charger); or convert in separate patch to devm-like method. Best regards, Krzysztof > + return ret; > + } > + > + return 0; > } > > static int bq24257_remove(struct i2c_client *client) > @@ -902,6 +961,8 @@ static int bq24257_remove(struct i2c_client *client) > if (!bq->in_ilimit_autoset_disable) > cancel_delayed_work_sync(&bq->iilimit_setup_work); > > + sysfs_remove_group(&bq->charger->dev.kobj, &bq24257_attr_group); > + > power_supply_unregister(bq->charger); > > bq24257_field_write(bq, F_RESET, 1); /* reset to defaults */ > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html