linux-kernel - Re: [PATCH 1/2] power: supply: Add fwnode pointer to power_supply

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Message-ID: <20180522161532.qqmyknk6f3scwzpg@earth.universe>
Date:   Tue, 22 May 2018 18:15:32 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, support.opensource@...semi.com
Subject: Re: [PATCH 1/2] power: supply: Add fwnode pointer to
 power_supply_config struct

Hi,

On Tue, May 22, 2018 at 04:16:23PM +0100, Adam Thomson wrote:
> To allow users of the power supply framework to be hw description
> agnostic, this commit adds the ability to pass a fwnode pointer,
> via the power_supply_config structure, to the initialisation code
> of the core, instead of explicitly specifying of_ndoe. If that
> fwnode pointer is provided then it will automatically resolve down
> to of_node on platforms which support it, otherwise it will be NULL.
> 
> In the future, when ACPI support is added, this can be modified to
> accommodate ACPI without the need to change calling code which
> already provides the fwnode handle in this manner.
> 
> Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
> Suggested-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---

Reviewed-by: Sebastian Reichel <sebastian.reichel@...labora.co.uk>

-- Sebastian

>  drivers/power/supply/power_supply_core.c | 4 +++-
>  include/linux/power_supply.h             | 2 ++
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
> index ecd68c2..f57ab0a 100644
> --- a/drivers/power/supply/power_supply_core.c
> +++ b/drivers/power/supply/power_supply_core.c
> @@ -19,6 +19,7 @@
>  #include <linux/err.h>
>  #include <linux/of.h>
>  #include <linux/power_supply.h>
> +#include <linux/property.h>
>  #include <linux/thermal.h>
>  #include "power_supply.h"
>  
> @@ -874,7 +875,8 @@ static void psy_unregister_cooler(struct power_supply *psy)
>  	psy->desc = desc;
>  	if (cfg) {
>  		psy->drv_data = cfg->drv_data;
> -		psy->of_node = cfg->of_node;
> +		psy->of_node =
> +			cfg->fwnode ? to_of_node(cfg->fwnode) : cfg->of_node;
>  		psy->supplied_to = cfg->supplied_to;
>  		psy->num_supplicants = cfg->num_supplicants;
>  	}
> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
> index 0c9a572..b21c4bd9 100644
> --- a/include/linux/power_supply.h
> +++ b/include/linux/power_supply.h
> @@ -199,6 +199,8 @@ enum power_supply_notifier_events {
>  /* Run-time specific power supply configuration */
>  struct power_supply_config {
>  	struct device_node *of_node;
> +	struct fwnode_handle *fwnode;
> +
>  	/* Driver private data */
>  	void *drv_data;
>  
> -- 
> 1.9.1
> 

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