Re: [PATCH 5/6] power: supply: charger-manager: Remove deprecated extcon APIs

From: Rob Herring
Date: Tue Dec 04 2018 - 16:52:25 EST

On Fri, Nov 16, 2018 at 07:01:12PM +0800, Baolin Wang wrote:
> The struct extcon_specific_cable_nb and related APIs are deprecated now,
> so we should use new method to get one extcon device and register extcon
> notifier.
>
> Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx>
> ---
> .../bindings/power/supply/charger-manager.txt | 6 +--

Bindings should be a separate patch.

> drivers/power/supply/charger-manager.c | 51 ++++++++------------
> include/linux/power/charger-manager.h | 2 +-
> 3 files changed, 23 insertions(+), 36 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/power/supply/charger-manager.txt b/Documentation/devicetree/bindings/power/supply/charger-manager.txt
> index ec4fe9d..315b0cb 100644
> --- a/Documentation/devicetree/bindings/power/supply/charger-manager.txt
> +++ b/Documentation/devicetree/bindings/power/supply/charger-manager.txt
> @@ -11,7 +11,7 @@ Required properties :
> - cm-regulator-name : name of charger regulator
> - subnode <cable> :
> - cm-cable-name : name of charger cable
> - - cm-cable-extcon : name of extcon dev
> + - extcon : phandles to external connector devices

Somewhat less terrible, but not really. I consider extcon binding itself
deprecated. I suspect 'charger-manager' as a whole probably needs to be
reworked. This also is not a backwards compatible change.

> (optional) - cm-cable-min : minimum current of cable
> (optional) - cm-cable-max : maximum current of cable
>
> @@ -66,13 +66,13 @@ Example :
> cm-regulator-name = "chg-reg";
> cable@0 {
> cm-cable-name = "USB";
> - cm-cable-extcon = "extcon-dev.0";
> + extcon = <&extcon_usb>;
> cm-cable-min = <475000>;
> cm-cable-max = <500000>;
> };
> cable@1 {
> cm-cable-name = "TA";
> - cm-cable-extcon = "extcon-dev.0";
> + extcon = <&extcon_usb>;
> cm-cable-min = <650000>;
> cm-cable-max = <675000>;
> };
> diff --git a/drivers/power/supply/charger-manager.c b/drivers/power/supply/charger-manager.c
> index dc0c9a6..4f28c03 100644
> --- a/drivers/power/supply/charger-manager.c
> +++ b/drivers/power/supply/charger-manager.c
> @@ -1207,12 +1207,11 @@ static int charger_extcon_init(struct charger_manager *cm,
> */
> INIT_WORK(&cable->wq, charger_extcon_work);
> cable->nb.notifier_call = charger_extcon_notifier;
> - ret = extcon_register_interest(&cable->extcon_dev,
> - cable->extcon_name, cable->name, &cable->nb);
> - if (ret < 0) {
> - pr_info("Cannot register extcon_dev for %s(cable: %s)\n",
> - cable->extcon_name, cable->name);
> - }
> + ret = devm_extcon_register_notifier(cm->dev, cable->extcon_dev,
> + EXTCON_USB, &cable->nb);
> + if (ret < 0)
> + dev_err(cm->dev, "Cannot register extcon_dev for (cable: %s)\n",
> + cable->name);
>
> return ret;
> }
> @@ -1589,15 +1588,25 @@ static struct charger_desc *of_cm_parse_desc(struct device *dev)
> for_each_child_of_node(child, _child) {
> of_property_read_string(_child,
> "cm-cable-name", &cables->name);
> - of_property_read_string(_child,
> - "cm-cable-extcon",
> - &cables->extcon_name);
> of_property_read_u32(_child,
> "cm-cable-min",
> &cables->min_uA);
> of_property_read_u32(_child,
> "cm-cable-max",
> &cables->max_uA);
> +
> + if (of_property_read_bool(_child, "extcon")) {
> + struct device_node *np;
> +
> + np = of_parse_phandle(_child, "extcon", 0);
> + if (!np)
> + return ERR_PTR(-ENODEV);
> +
> + cables->extcon_dev = extcon_find_edev_by_node(np);
> + of_node_put(np);
> + if (IS_ERR(cables->extcon_dev))
> + return ERR_PTR(PTR_ERR(cables->extcon_dev));
> + }
> cables++;
> }
> }
> @@ -1625,7 +1634,6 @@ static int charger_manager_probe(struct platform_device *pdev)
> struct charger_desc *desc = cm_get_drv_data(pdev);
> struct charger_manager *cm;
> int ret, i = 0;
> - int j = 0;
> union power_supply_propval val;
> struct power_supply *fuel_gauge;
> struct power_supply_config psy_cfg = {};
> @@ -1823,19 +1831,8 @@ static int charger_manager_probe(struct platform_device *pdev)
> &charger->attr_g);
> }
> err_reg_extcon:
> - for (i = 0; i < desc->num_charger_regulators; i++) {
> - struct charger_regulator *charger;
> -
> - charger = &desc->charger_regulators[i];
> - for (j = 0; j < charger->num_cables; j++) {
> - struct charger_cable *cable = &charger->cables[j];
> - /* Remove notifier block if only edev exists */
> - if (cable->extcon_dev.edev)
> - extcon_unregister_interest(&cable->extcon_dev);
> - }
> -
> + for (i = 0; i < desc->num_charger_regulators; i++)
> regulator_put(desc->charger_regulators[i].consumer);
> - }
>
> power_supply_unregister(cm->charger_psy);
>
> @@ -1847,7 +1844,6 @@ static int charger_manager_remove(struct platform_device *pdev)
> struct charger_manager *cm = platform_get_drvdata(pdev);
> struct charger_desc *desc = cm->desc;
> int i = 0;
> - int j = 0;
>
> /* Remove from the list */
> mutex_lock(&cm_list_mtx);
> @@ -1857,15 +1853,6 @@ static int charger_manager_remove(struct platform_device *pdev)
> cancel_work_sync(&setup_polling);
> cancel_delayed_work_sync(&cm_monitor_work);
>
> - for (i = 0 ; i < desc->num_charger_regulators ; i++) {
> - struct charger_regulator *charger
> - = &desc->charger_regulators[i];
> - for (j = 0 ; j < charger->num_cables ; j++) {
> - struct charger_cable *cable = &charger->cables[j];
> - extcon_unregister_interest(&cable->extcon_dev);
> - }
> - }
> -
> for (i = 0 ; i < desc->num_charger_regulators ; i++)
> regulator_put(desc->charger_regulators[i].consumer);
>
> diff --git a/include/linux/power/charger-manager.h b/include/linux/power/charger-manager.h
> index c4fa907..e4d0269 100644
> --- a/include/linux/power/charger-manager.h
> +++ b/include/linux/power/charger-manager.h
> @@ -66,7 +66,7 @@ struct charger_cable {
> const char *name;
>
> /* The charger-manager use Extcon framework */
> - struct extcon_specific_cable_nb extcon_dev;
> + struct extcon_dev *extcon_dev;
> struct work_struct wq;
> struct notifier_block nb;
>
> --
> 1.7.9.5
>