On 16.09.2015 02:58, Andreas Dannenberg wrote:
> A new optional device property called "ti,in-dpm-voltage" is introduced
> to allow configuring the input voltage threshold for the devices'
> dynamic power path management (DPM) feature. In short, it can be used to
> prevent the input voltage from dropping below a certain value as current
> is drawn to charge the battery or supply the system.
>
> Signed-off-by: Andreas Dannenberg <[email protected]>
> ---
> drivers/power/bq24257_charger.c | 44
> +++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 44 insertions(+)
>
> diff --git a/drivers/power/bq24257_charger.c b/drivers/power/bq24257_charger.c
> index 47af858..84a8945 100644
> --- a/drivers/power/bq24257_charger.c
> +++ b/drivers/power/bq24257_charger.c
> @@ -76,6 +76,7 @@ struct bq24257_init_data {
> u8 iterm; /* termination current */
> u8 in_ilimit; /* input current limit */
> u8 vovp; /* over voltage protection voltage */
> + u8 vindpm; /* VDMP input threshold voltage */
> };
>
> struct bq24257_state {
> @@ -206,6 +207,13 @@ static const u32 bq24257_vovp_map[] = {
>
> #define BQ24257_VOVP_MAP_SIZE ARRAY_SIZE(bq24257_vovp_map)
>
> +static const u32 bq24257_vindpm_map[] = {
> + 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
> + 4760000
> +};
> +
> +#define BQ24257_VINDPM_MAP_SIZE ARRAY_SIZE(bq24257_vindpm_map)
> +
> static int bq24257_field_read(struct bq24257_device *bq,
> enum bq24257_fields field_id)
> {
> @@ -432,6 +440,17 @@ enum bq24257_vovp {
> VOVP_10500
> };
>
> +enum bq24257_vindpm {
> + VINDPM_4200,
> + VINDPM_4280,
> + VINDPM_4360,
> + VINDPM_4440,
> + VINDPM_4520,
> + VINDPM_4600,
> + VINDPM_4680,
> + VINDPM_4760
> +};
Same as patch 6/10... but now see the use case - to choose default value
not by index of array but from this enum.
I see the idea behind so skip that comment from 6/10.
> +
> enum bq24257_port_type {
> PORT_TYPE_DCP, /* Dedicated Charging Port */
> PORT_TYPE_CDP, /* Charging Downstream Port */
> @@ -615,6 +634,7 @@ static int bq24257_hw_init(struct bq24257_device *bq)
> {F_VBAT, bq->init_data.vbat},
> {F_ITERM, bq->init_data.iterm},
> {F_VOVP, bq->init_data.vovp},
> + {F_VINDPM, bq->init_data.vindpm},
> };
>
> /*
> @@ -648,6 +668,7 @@ static int bq24257_hw_init(struct bq24257_device *bq)
> /* program fixed input current limit */
> ret = bq24257_field_write(bq, F_IILIMIT,
> bq->init_data.in_ilimit);
> +
Not part of this patch. It confuses the reviewer of patch. If you need
cleanups, make them separate.
> if (ret < 0)
> return ret;
> } else if (!state.power_good)
> @@ -695,10 +716,23 @@ static ssize_t bq24257_show_ovp_voltage(struct device
> *dev,
> bq24257_vovp_map[bq->init_data.vovp]);
> }
>
> +static ssize_t bq24257_show_in_dpm_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",
> + bq24257_vindpm_map[bq->init_data.vindpm]);
Same as patch 6/10.
Best regards,
Krzysztof
> +}
> +
> static DEVICE_ATTR(ovp_voltage, S_IRUGO, bq24257_show_ovp_voltage, NULL);
> +static DEVICE_ATTR(in_dpm_voltage, S_IRUGO, bq24257_show_in_dpm_voltage,
> NULL);
>
> static struct attribute *bq24257_charger_attr[] = {
> &dev_attr_ovp_voltage.attr,
> + &dev_attr_in_dpm_voltage.attr,
> NULL,
> };
>
> @@ -801,6 +835,16 @@ static int bq24257_fw_probe(struct bq24257_device *bq)
> bq24257_vovp_map,
> BQ24257_VOVP_MAP_SIZE);
>
> + ret = device_property_read_u32(bq->dev, "ti,in-dpm-voltage",
> + &property);
> + if (ret < 0)
> + bq->init_data.vindpm = VINDPM_4360;
> + else
> + bq->init_data.vindpm =
> + bq24257_find_idx(property,
> + bq24257_vindpm_map,
> + BQ24257_VINDPM_MAP_SIZE);
> +
> return 0;
> }
>
>
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