linux-kernel - Re: [PATCH v2 28/34] power: supply: ab8500: Migrate to aggregate driver

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Message-ID: <20211013162455.2srbgmxw6dgoplzo@earth.universe>
Date:   Wed, 13 Oct 2021 18:24:55 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Stephen Boyd <swboyd@...omium.org>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-pm@...r.kernel.org, Daniel Vetter <daniel.vetter@...ll.ch>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Clark <robdclark@...il.com>,
        Russell King <rmk+kernel@....linux.org.uk>,
        Saravana Kannan <saravanak@...gle.com>
Subject: Re: [PATCH v2 28/34] power: supply: ab8500: Migrate to aggregate
 driver

Hi,

[+cc Linus Walleij (I guess we should add a MAINTAINERS entry for
the ab8500* power-supply drivers)]

On Wed, Oct 06, 2021 at 12:38:13PM -0700, Stephen Boyd wrote:
> Use an aggregate driver instead of component ops so that we can get
> proper driver probe ordering of the aggregate device with respect to all
> the component devices that make up the aggregate device.
> 
> Cc: Sebastian Reichel <sre@...nel.org>
> Cc: <linux-pm@...r.kernel.org>
> Cc: Daniel Vetter <daniel.vetter@...ll.ch>
> Cc: "Rafael J. Wysocki" <rafael@...nel.org>
> Cc: Rob Clark <robdclark@...il.com>
> Cc: Russell King <rmk+kernel@....linux.org.uk>
> Cc: Saravana Kannan <saravanak@...gle.com>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---

Acked-by: Sebastian Reichel <sre@...nel.org>

-- Sebastian

>  drivers/power/supply/ab8500_charger.c | 22 +++++++++++++---------
>  1 file changed, 13 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
> index 15eadaf46f14..52d4105e28f2 100644
> --- a/drivers/power/supply/ab8500_charger.c
> +++ b/drivers/power/supply/ab8500_charger.c
> @@ -3312,8 +3312,9 @@ static const struct power_supply_desc ab8500_usb_chg_desc = {
>  	.get_property	= ab8500_charger_usb_get_property,
>  };
>  
> -static int ab8500_charger_bind(struct device *dev)
> +static int ab8500_charger_bind(struct aggregate_device *adev)
>  {
> +	struct device *dev = adev->parent;
>  	struct ab8500_charger *di = dev_get_drvdata(dev);
>  	int ch_stat;
>  	int ret;
> @@ -3354,8 +3355,9 @@ static int ab8500_charger_bind(struct device *dev)
>  	return 0;
>  }
>  
> -static void ab8500_charger_unbind(struct device *dev)
> +static void ab8500_charger_unbind(struct aggregate_device *adev)
>  {
> +	struct device *dev = adev->parent;
>  	struct ab8500_charger *di = dev_get_drvdata(dev);
>  	int ret;
>  
> @@ -3380,9 +3382,13 @@ static void ab8500_charger_unbind(struct device *dev)
>  	component_unbind_all(dev, di);
>  }
>  
> -static const struct component_master_ops ab8500_charger_comp_ops = {
> -	.bind = ab8500_charger_bind,
> -	.unbind = ab8500_charger_unbind,
> +static struct aggregate_driver ab8500_charger_aggregate_driver = {
> +	.probe = ab8500_charger_bind,
> +	.remove = ab8500_charger_unbind,
> +	.driver = {
> +		.name = "ab8500_charger_agg",
> +		.owner = THIS_MODULE,
> +	},
>  };
>  
>  static struct platform_driver *const ab8500_charger_component_drivers[] = {
> @@ -3663,9 +3669,7 @@ static int ab8500_charger_probe(struct platform_device *pdev)
>  	}
>  
>  
> -	ret = component_master_add_with_match(&pdev->dev,
> -					      &ab8500_charger_comp_ops,
> -					      match);
> +	ret = component_aggregate_register(&pdev->dev, &ab8500_charger_aggregate_driver, match);
>  	if (ret) {
>  		dev_err(dev, "failed to add component master\n");
>  		goto free_notifier;
> @@ -3688,7 +3692,7 @@ static int ab8500_charger_remove(struct platform_device *pdev)
>  {
>  	struct ab8500_charger *di = platform_get_drvdata(pdev);
>  
> -	component_master_del(&pdev->dev, &ab8500_charger_comp_ops);
> +	component_aggregate_unregister(&pdev->dev, &ab8500_charger_aggregate_driver);
>  
>  	usb_unregister_notifier(di->usb_phy, &di->nb);
>  	usb_put_phy(di->usb_phy);
> -- 
> https://chromeos.dev
> 

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