Hi,
On Wed, Oct 31, 2018 at 08:11:46PM -0400, Brian Masney wrote:
> Add extcon support so that we can notify USB drivers of cable state
> changes. Based on work from Jonathan Marek. USB OTG was tested on a LG
> Nexus 5 (hammerhead) phone.
>
> Signed-off-by: Brian Masney <masneyb@xxxxxxxxxxxxx>
> ---
Thanks, queued.
-- Sebastian
> drivers/power/supply/bq24190_charger.c | 37 +++++++++++++++++++++++++-
> 1 file changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> index 9e7f3e33458a..4e64e6ac95c5 100644
> --- a/drivers/power/supply/bq24190_charger.c
> +++ b/drivers/power/supply/bq24190_charger.c
> @@ -21,6 +21,7 @@
> #include <linux/workqueue.h>
> #include <linux/gpio.h>
> #include <linux/i2c.h>
> +#include <linux/extcon-provider.h>
>
> #define BQ24190_MANUFACTURER "Texas Instruments"
>
> @@ -159,6 +160,7 @@
> struct bq24190_dev_info {
> struct i2c_client *client;
> struct device *dev;
> + struct extcon_dev *edev;
> struct power_supply *charger;
> struct power_supply *battery;
> struct delayed_work input_current_limit_work;
> @@ -174,6 +176,11 @@ struct bq24190_dev_info {
> u8 watchdog;
> };
>
> +static const unsigned int bq24190_usb_extcon_cable[] = {
> + EXTCON_USB,
> + EXTCON_NONE,
> +};
> +
> /*
> * The tables below provide a 2-way mapping for the value that goes in
> * the register field and the real-world value that it represents.
> @@ -1528,6 +1535,20 @@ static const struct power_supply_desc bq24190_battery_desc = {
> .property_is_writeable = bq24190_battery_property_is_writeable,
> };
>
> +static int bq24190_configure_usb_otg(struct bq24190_dev_info *bdi, u8 ss_reg)
> +{
> + bool otg_enabled;
> + int ret;
> +
> + otg_enabled = !!(ss_reg & BQ24190_REG_SS_VBUS_STAT_MASK);
> + ret = extcon_set_state_sync(bdi->edev, EXTCON_USB, otg_enabled);
> + if (ret < 0)
> + dev_err(bdi->dev, "Can't set extcon state to %d: %d\n",
> + otg_enabled, ret);
> +
> + return ret;
> +}
> +
> static void bq24190_check_status(struct bq24190_dev_info *bdi)
> {
> const u8 battery_mask_ss = BQ24190_REG_SS_CHRG_STAT_MASK;
> @@ -1597,8 +1618,10 @@ static void bq24190_check_status(struct bq24190_dev_info *bdi)
> bdi->ss_reg = ss_reg;
> }
>
> - if (alert_charger || alert_battery)
> + if (alert_charger || alert_battery) {
> power_supply_changed(bdi->charger);
> + bq24190_configure_usb_otg(bdi, ss_reg);
> + }
> if (alert_battery && bdi->battery)
> power_supply_changed(bdi->battery);
>
> @@ -1732,6 +1755,14 @@ static int bq24190_probe(struct i2c_client *client,
> return -EINVAL;
> }
>
> + bdi->edev = devm_extcon_dev_allocate(dev, bq24190_usb_extcon_cable);
> + if (IS_ERR(bdi->edev))
> + return PTR_ERR(bdi->edev);
> +
> + ret = devm_extcon_dev_register(dev, bdi->edev);
> + if (ret < 0)
> + return ret;
> +
> pm_runtime_enable(dev);
> pm_runtime_use_autosuspend(dev);
> pm_runtime_set_autosuspend_delay(dev, 600);
> @@ -1778,6 +1809,10 @@ static int bq24190_probe(struct i2c_client *client,
> goto out_charger;
> }
>
> + ret = bq24190_configure_usb_otg(bdi, bdi->ss_reg);
> + if (ret < 0)
> + goto out_charger;
> +
> ret = bq24190_sysfs_create_group(bdi);
> if (ret < 0) {
> dev_err(dev, "Can't create sysfs entries\n");
> --
> 2.17.2
>
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